first commit
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471
raid_operations.py
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471
raid_operations.py
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# raid_operations.py
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import logging
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import subprocess
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from PySide6.QtWidgets import QMessageBox, QInputDialog, QLineEdit
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from PySide6.QtCore import Qt
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from system_info import SystemInfoManager
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import re
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import pexpect
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import sys
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logger = logging.getLogger(__name__)
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class RaidOperations:
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def __init__(self, system_manager: SystemInfoManager):
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self.system_manager = system_manager
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def _execute_shell_command(self, command_list, error_msg_prefix, suppress_critical_dialog_on_stderr_match=None, input_to_command=None):
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"""
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执行一个shell命令并返回stdout和stderr。
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这个方法包装了 SystemInfoManager._run_command，并统一处理日志和错误消息框。
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它会通过 SystemInfoManager 自动处理 sudo。
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:param command_list: 命令及其参数的列表。
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:param error_msg_prefix: 命令失败时显示给用户的错误消息前缀。
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:param suppress_critical_dialog_on_stderr_match: 一个字符串或字符串元组。
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如果在 stderr 中找到此字符串（或元组中的任一字符串），
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则在 CalledProcessError 发生时，只记录日志，不弹出 QMessagebox.critical。
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:param input_to_command: 传递给命令stdin的数据 (str)。
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:return: (bool success, str stdout, str stderr)
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"""
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full_cmd_str = ' '.join(command_list)
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logger.info(f"执行命令: {full_cmd_str}")
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try:
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stdout, stderr = self.system_manager._run_command(
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command_list,
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root_privilege=True,
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check_output=True,
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input_data=input_to_command
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)
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if stdout: logger.debug(f"命令 '{full_cmd_str}' 标准输出:\n{stdout.strip()}")
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if stderr: logger.debug(f"命令 '{full_cmd_str}' 标准错误:\n{stderr.strip()}")
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return True, stdout, stderr
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except subprocess.CalledProcessError as e:
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stderr_output = e.stderr.strip()
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logger.error(f"{error_msg_prefix} 命令: {full_cmd_str}")
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logger.error(f"退出码: {e.returncode}")
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logger.error(f"标准输出: {e.stdout.strip()}")
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logger.error(f"标准错误: {stderr_output}")
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should_suppress_dialog = False
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if suppress_critical_dialog_on_stderr_match:
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if isinstance(suppress_critical_dialog_on_stderr_match, str):
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if suppress_critical_dialog_on_stderr_match in stderr_output:
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should_suppress_dialog = True
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elif isinstance(suppress_critical_dialog_on_stderr_match, (list, tuple)):
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for pattern in suppress_critical_dialog_on_stderr_match:
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if pattern in stderr_output:
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should_suppress_dialog = True
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break
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if should_suppress_dialog:
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logger.info(f"特定错误 '{stderr_output}' 匹配抑制条件，已抑制错误对话框。")
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else:
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n详细信息: {stderr_output}")
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return False, e.stdout, stderr_output
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except FileNotFoundError:
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logger.error(f"命令 '{command_list[0]}' 未找到。请确保已安装相关工具。")
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QMessageBox.critical(None, "错误", f"命令 '{command_list[0]}' 未找到。请确保已安装相关工具。")
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return False, "", "Command not found."
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except Exception as e:
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logger.error(f"{error_msg_prefix} 命令: {full_cmd_str} 发生未知错误: {e}")
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n未知错误: {e}")
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return False, "", str(e)
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def _execute_interactive_mdadm_command(self, command_list, error_msg_prefix):
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"""
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专门处理 mdadm --create 命令的交互式执行。
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通过 pexpect 监听提示并弹出 QMessageBox 让用户选择。
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"""
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full_cmd_str = "sudo " + ' '.join(command_list)
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logger.info(f"执行交互式命令: {full_cmd_str}")
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stdout_buffer = []
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try:
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child = pexpect.spawn(full_cmd_str, encoding='utf-8', timeout=300)
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child.logfile = sys.stdout
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try:
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index = child.expect(['[pP]assword for', pexpect.TIMEOUT], timeout=5)
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if index == 0:
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stdout_buffer.append(child.before)
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password, ok = QInputDialog.getText(
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None, "Sudo 密码", "请输入您的 sudo 密码:", QLineEdit.Password
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)
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if not ok or not password:
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QMessageBox.critical(None, "错误", "sudo 密码未提供或取消。")
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child.close()
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return False, "".join(stdout_buffer), "Sudo 密码未提供或取消。"
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child.sendline(password)
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stdout_buffer.append(child.after)
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logger.info("已发送 sudo 密码。")
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elif index == 1:
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logger.info("Sudo 未提示输入密码（可能已配置 NOPASSWD 或密码已缓存）。")
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stdout_buffer.append(child.before)
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except pexpect.exceptions.EOF:
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stdout_buffer.append(child.before)
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logger.error("命令在 sudo 密码提示前退出。")
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child.close()
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return False, "".join(stdout_buffer), "命令在 sudo 密码提示前退出。"
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except pexpect.exceptions.TIMEOUT:
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logger.info("Sudo 密码提示超时，可能已配置 NOPASSWD 或密码已缓存。")
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stdout_buffer.append(child.before)
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prompts_data = [
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(r"To optimalize recovery speed, .* write-(?:intent|indent) bitmap, do you want to enable it now\? \[y/N\]\s*",
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"mdadm 建议启用写入意图位图以优化恢复速度。您希望现在启用它吗？"),
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(r"Continue creating array \[y/N\]\s*",
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"mdadm 警告：检测到驱动器大小不一致或分区表。创建阵列将覆盖数据。是否仍要继续创建阵列？")
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]
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patterns_to_expect = [p for p, _ in prompts_data]
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while True:
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try:
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index = child.expect(patterns_to_expect, timeout=10)
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stdout_buffer.append(child.before)
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matched_description = prompts_data[index][1]
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reply = QMessageBox.question(None, "mdadm 提示", matched_description,
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QMessageBox.Yes | QMessageBox.No, QMessageBox.Yes)
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if reply == QMessageBox.Yes:
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user_choice = 'y'
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logger.info(f"用户对提示 '{matched_description}' 选择 '是'")
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else:
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user_choice = 'n'
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logger.info(f"用户对提示 '{matched_description}' 选择 '否'")
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child.sendline(user_choice)
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stdout_buffer.append(user_choice + '\n')
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except pexpect.exceptions.TIMEOUT:
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logger.debug("在等待 mdadm 提示时超时，可能没有更多交互。")
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stdout_buffer.append(child.before)
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break
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except pexpect.exceptions.EOF:
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logger.warning("在等待 mdadm 提示时遇到 EOF。")
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stdout_buffer.append(child.before)
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break
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try:
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child.expect(pexpect.EOF, timeout=120)
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stdout_buffer.append(child.before)
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logger.info("mdadm 命令已正常结束 (通过 EOF 捕获)。")
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except pexpect.exceptions.TIMEOUT:
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stdout_buffer.append(child.before)
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logger.error(f"mdadm 命令在所有交互完成后，等待 EOF 超时。")
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n详细信息: mdadm 命令在交互完成后未正常退出，等待 EOF 超时。")
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child.close()
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return False, "".join(stdout_buffer), "mdadm 命令等待 EOF 超时。"
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except pexpect.exceptions.EOF:
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stdout_buffer.append(child.before)
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logger.info("mdadm 命令已正常结束 (通过 EOF 捕获)。")
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child.close()
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final_output = "".join(stdout_buffer)
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if child.exitstatus == 0:
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logger.info(f"交互式命令 {full_cmd_str} 成功完成。")
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return True, final_output, ""
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else:
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logger.error(f"交互式命令 {full_cmd_str} 失败，退出码: {child.exitstatus}")
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n详细信息: 命令执行失败，退出码 {child.exitstatus}\n输出: {final_output}")
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return False, final_output, f"命令执行失败，退出码 {child.exitstatus}"
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except pexpect.exceptions.ExceptionPexpect as e:
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logger.error(f"pexpect 内部错误: {e}")
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n详细信息: pexpect 内部错误: {e}")
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return False, "", str(e)
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except Exception as e:
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logger.error(f"执行交互式命令 {full_cmd_str} 时发生未知错误: {e}")
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QMessageBox.critical(None, "错误", f"{error_msg_prefix}\n未知错误: {e}")
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return False, "", str(e)
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def _get_next_available_md_device_name(self):
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"""
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查找下一个可用的 /dev/mdX 设备名称（例如 /dev/md0, /dev/md1, ...）。
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"""
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existing_md_numbers = set()
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try:
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raid_arrays = self.system_manager.get_mdadm_arrays()
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for array in raid_arrays:
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device_path = array.get('device')
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if device_path and device_path.startswith('/dev/md'):
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match = re.match(r'/dev/md(\d+)', device_path)
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if match:
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existing_md_numbers.add(int(match.group(1)))
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except Exception as e:
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logger.warning(f"获取现有 RAID 阵列信息失败，可能无法找到最优的下一个设备名: {e}")
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next_md_num = 0
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while next_md_num in existing_md_numbers:
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next_md_num += 1
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return f"/dev/md{next_md_num}"
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def create_raid_array(self, devices, level, chunk_size):
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"""
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创建 RAID 阵列。
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:param devices: 成员设备列表，例如 ['/dev/sdb1', '/dev/sdc1']
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:param level: RAID 级别，例如 'raid0', 'raid1', 'raid5' (也可以是整数 0, 1, 5)
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:param chunk_size: Chunk 大小 (KB)
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"""
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if isinstance(level, int):
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level_str = f"raid{level}"
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elif isinstance(level, str):
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if level in ["0", "1", "5", "6", "10"]:
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level_str = f"raid{level}"
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else:
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level_str = level
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else:
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QMessageBox.critical(None, "错误", f"不支持的 RAID 级别类型: {type(level)}")
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return False
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level = level_str
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if not devices or len(devices) < 1:
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QMessageBox.critical(None, "错误", "创建 RAID 阵列至少需要一个设备（RAID0）。")
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return False
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if level == "raid1" and len(devices) < 2:
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QMessageBox.critical(None, "错误", "RAID1 至少需要两个设备。")
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return False
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if level == "raid5" and len(devices) < 3:
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QMessageBox.critical(None, "错误", "RAID5 至少需要三个设备。")
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return False
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if level == "raid6" and len(devices) < 4:
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QMessageBox.critical(None, "错误", "RAID6 至少需要四个设备。")
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return False
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if level == "raid10" and len(devices) < 2:
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QMessageBox.critical(None, "错误", "RAID10 至少需要两个设备。")
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return False
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reply = QMessageBox.question(None, "确认创建 RAID 阵列",
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f"你确定要使用设备 {', '.join(devices)} 创建 RAID {level} 阵列吗？\n"
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"此操作将销毁设备上的所有数据！",
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QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
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if reply == QMessageBox.No:
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logger.info("用户取消了创建 RAID 阵列的操作。")
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return False
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logger.info(f"尝试创建 RAID {level} 阵列，成员设备: {', '.join(devices)}, Chunk 大小: {chunk_size}KB。")
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# 1. 清除设备上的旧 RAID 超级块（如果有）
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for dev in devices:
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clear_cmd = ["mdadm", "--zero-superblock", "--force", dev]
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no_superblock_error_match = "Unrecognised md component device"
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success, _, stderr = self._execute_shell_command(
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clear_cmd,
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f"清除设备 {dev} 上的旧 RAID 超级块失败",
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suppress_critical_dialog_on_stderr_match=no_superblock_error_match
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)
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if no_superblock_error_match in stderr:
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logger.info(f"设备 {dev} 上未找到旧 RAID 超级块，已确保其干净。")
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elif success:
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logger.info(f"已清除设备 {dev} 上的旧 RAID 超级块。")
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else:
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logger.error(f"清除设备 {dev} 上的旧 RAID 超级块失败，中断 RAID 创建。")
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return False
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# 2. 创建 RAID 阵列
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array_name = self._get_next_available_md_device_name()
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logger.info(f"将使用自动生成的 RAID 阵列名称: {array_name}")
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create_cmd_base = ["mdadm", "--create", array_name, "--level=" + level.replace("raid", ""),
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f"--raid-devices={len(devices)}"]
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if level in ["raid0", "raid5", "raid6", "raid10"]:
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create_cmd_base.append(f"--chunk={chunk_size}K")
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create_cmd = create_cmd_base + devices
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create_cmd.insert(2, "--force")
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success_create, stdout_create, stderr_create = self._execute_interactive_mdadm_command(
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create_cmd,
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f"创建 RAID 阵列失败"
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)
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if not success_create:
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if "Array name" in stdout_create and "is in use already" in stdout_create:
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QMessageBox.critical(None, "错误", f"创建 RAID 阵列失败：阵列名称 {array_name} 已被占用。请尝试停止或删除现有阵列。")
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return False
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logger.info(f"成功创建 RAID {level} 阵列 {array_name}。")
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QMessageBox.information(None, "成功", f"成功创建 RAID {level} 阵列 {array_name}。")
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# 3. 刷新 mdadm 配置并等待阵列激活
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examine_scan_cmd = ["mdadm", "--examine", "--scan"]
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success_scan, scan_stdout, _ = self._execute_shell_command(examine_scan_cmd, "扫描 mdadm 配置失败")
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if success_scan:
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mkdir_cmd = ["mkdir", "-p", "/etc"]
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success_mkdir, _, stderr_mkdir = self._execute_shell_command(
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mkdir_cmd,
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"创建 /etc 目录失败"
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)
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if not success_mkdir:
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logger.error(f"无法创建 /etc 目录，更新 mdadm.conf 失败。错误: {stderr_mkdir}")
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QMessageBox.critical(None, "错误", f"无法创建 /etc 目录，更新 mdadm.conf 失败。\n详细信息: {stderr_mkdir}")
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return False
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logger.info("已确保 /etc 目录存在。")
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success_append, _, _ = self._execute_shell_command(
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["bash", "-c", f"echo '{scan_stdout.strip()}' | tee -a /etc/mdadm.conf > /dev/null"],
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"更新 /etc/mdadm/mdadm.conf 失败"
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)
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if not success_append:
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logger.warning("更新 /etc/mdadm.conf 失败。")
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else:
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logger.info("已成功更新 /etc/mdadm.conf。")
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else:
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logger.warning("未能扫描到 mdadm 配置，跳过更新 mdadm.conf。")
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return True
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def stop_raid_array(self, array_path):
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"""
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停止一个 RAID 阵列。
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:param array_path: RAID 阵列的设备路径，例如 /dev/md0
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"""
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reply = QMessageBox.question(None, "确认停止 RAID 阵列",
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f"你确定要停止 RAID 阵列 {array_path} 吗？\n"
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"停止阵列将使其无法访问，并可能需要重新组装。",
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QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
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if reply == QMessageBox.No:
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logger.info(f"用户取消了停止 RAID 阵列 {array_path} 的操作。")
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return False
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logger.info(f"尝试停止 RAID 阵列: {array_path}")
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# Original umount call (not using disk_ops.unmount_partition)
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self._execute_shell_command(
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["umount", array_path],
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f"尝试卸载 {array_path} 失败",
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suppress_critical_dialog_on_stderr_match=("not mounted", "未挂载")
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)
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if not self._execute_shell_command(["mdadm", "--stop", array_path], f"停止 RAID 阵列 {array_path} 失败")[0]:
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return False
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|
||||
logger.info(f"成功停止 RAID 阵列 {array_path}。")
|
||||
QMessageBox.information(None, "成功", f"成功停止 RAID 阵列 {array_path}。")
|
||||
return True
|
||||
|
||||
def delete_active_raid_array(self, array_path, member_devices, uuid):
|
||||
"""
|
||||
删除一个活动的 RAID 阵列。
|
||||
此操作将停止阵列、清除成员设备上的超级块，并删除 mdadm.conf 中的配置。
|
||||
:param array_path: RAID 阵列的设备路径，例如 /dev/md0
|
||||
:param member_devices: 成员设备列表，例如 ['/dev/sdb1', '/dev/sdc1']
|
||||
:param uuid: RAID 阵列的 UUID
|
||||
"""
|
||||
reply = QMessageBox.question(None, "确认删除 RAID 阵列",
|
||||
f"你确定要删除 RAID 阵列 {array_path} 吗？\n"
|
||||
"此操作将停止阵列，清除成员设备上的 RAID 超级块，并删除其配置，数据将无法访问！",
|
||||
QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
|
||||
if reply == QMessageBox.No:
|
||||
logger.info(f"用户取消了删除 RAID 阵列 {array_path} 的操作。")
|
||||
return False
|
||||
|
||||
logger.info(f"尝试删除活动 RAID 阵列: {array_path} (UUID: {uuid})")
|
||||
|
||||
# 1. 停止阵列
|
||||
if not self.stop_raid_array(array_path):
|
||||
QMessageBox.critical(None, "错误", f"删除 RAID 阵列 {array_path} 失败，因为无法停止阵列。")
|
||||
return False
|
||||
|
||||
# 2. 清除成员设备上的超级块
|
||||
success_all_cleared = True
|
||||
for dev in member_devices:
|
||||
clear_cmd = ["mdadm", "--zero-superblock", "--force", dev]
|
||||
no_superblock_error_match = "Unrecognised md component device"
|
||||
|
||||
success, _, stderr = self._execute_shell_command(
|
||||
clear_cmd,
|
||||
f"清除设备 {dev} 上的 RAID 超级块失败",
|
||||
suppress_critical_dialog_on_stderr_match=no_superblock_error_match
|
||||
)
|
||||
|
||||
if no_superblock_error_match in stderr:
|
||||
logger.info(f"设备 {dev} 上未找到旧 RAID 超级块，已确保其干净。")
|
||||
elif success:
|
||||
logger.info(f"已清除设备 {dev} 上的旧 RAID 超级块。")
|
||||
else:
|
||||
success_all_cleared = False
|
||||
logger.warning(f"未能清除设备 {dev} 上的 RAID 超级块，请手动检查。")
|
||||
|
||||
# 3. 从 mdadm.conf 中删除配置条目
|
||||
try:
|
||||
self.system_manager.delete_raid_array_config(uuid)
|
||||
logger.info(f"已成功从 mdadm.conf 中删除 UUID 为 {uuid} 的 RAID 阵列配置。")
|
||||
except Exception as e:
|
||||
QMessageBox.critical(None, "错误", f"删除 RAID 阵列 {array_path} 的配置失败: {e}")
|
||||
logger.error(f"删除 RAID 阵列 {array_path} 的配置失败: {e}")
|
||||
return False
|
||||
|
||||
if success_all_cleared:
|
||||
logger.info(f"成功删除 RAID 阵列 {array_path} 并清除了成员设备超级块。")
|
||||
QMessageBox.information(None, "成功", f"成功删除 RAID 阵列 {array_path}。")
|
||||
return True
|
||||
else:
|
||||
QMessageBox.critical(None, "错误", f"删除 RAID 阵列 {array_path} 完成，但部分成员设备超级块未能完全清除。")
|
||||
return False
|
||||
|
||||
def delete_configured_raid_array(self, uuid):
|
||||
"""
|
||||
只删除 mdadm.conf 中停止状态 RAID 阵列的配置条目。
|
||||
:param uuid: 要删除的 RAID 阵列的 UUID。
|
||||
:return: True 如果成功，False 如果失败。
|
||||
"""
|
||||
reply = QMessageBox.question(None, "确认删除 RAID 阵列配置",
|
||||
f"您确定要删除 UUID 为 {uuid} 的 RAID 阵列配置吗？\n"
|
||||
"此操作将从配置文件中移除该条目，但不会影响实际的磁盘数据或活动阵列。",
|
||||
QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
|
||||
if reply == QMessageBox.No:
|
||||
logger.info(f"用户取消了删除 UUID 为 {uuid} 的 RAID 阵列配置的操作。")
|
||||
return False
|
||||
|
||||
logger.info(f"尝试删除 UUID 为 {uuid} 的 RAID 阵列配置文件条目。")
|
||||
try:
|
||||
self.system_manager.delete_raid_array_config(uuid)
|
||||
QMessageBox.information(None, "成功", f"成功删除 UUID 为 {uuid} 的 RAID 阵列配置。")
|
||||
return True
|
||||
except Exception as e:
|
||||
QMessageBox.critical(None, "错误", f"删除 RAID 阵列配置失败: {e}")
|
||||
logger.error(f"删除 RAID 阵列配置失败: {e}")
|
||||
return False
|
||||
|
||||
|
||||
def activate_raid_array(self, array_path, array_uuid):
|
||||
"""
|
||||
激活一个已停止的 RAID 阵列。
|
||||
使用 mdadm --assemble <device> --uuid=<uuid>
|
||||
"""
|
||||
if not array_uuid or array_uuid == 'N/A':
|
||||
QMessageBox.critical(None, "错误", f"无法激活 RAID 阵列 {array_path}：缺少 UUID 信息。")
|
||||
logger.error(f"激活 RAID 阵列 {array_path} 失败：缺少 UUID。")
|
||||
return False
|
||||
|
||||
logger.info(f"尝试激活 RAID 阵列: {array_path} (UUID: {array_uuid})")
|
||||
|
||||
success, stdout, stderr = self._execute_shell_command(
|
||||
["mdadm", "--assemble", array_path, "--uuid", array_uuid],
|
||||
f"激活 RAID 阵列 {array_path} 失败",
|
||||
suppress_critical_dialog_on_stderr_match=("mdadm: device /dev/md", "already active", "No such file or directory")
|
||||
)
|
||||
|
||||
if success:
|
||||
logger.info(f"成功激活 RAID 阵列 {array_path} (UUID: {array_uuid})。")
|
||||
QMessageBox.information(None, "成功", f"成功激活 RAID 阵列 {array_path}。")
|
||||
return True
|
||||
else:
|
||||
logger.error(f"激活 RAID 阵列 {array_path} 失败。")
|
||||
return False
|
||||
Reference in New Issue
Block a user