Linux Mdadm + LVM 恢复

Linux Mdadm + LVM 恢复

我最近重新安装了 Ubuntu 服务器 10.04,但在重新激活包含所有非关键数据的 LVM 分区时遇到了问题。、、/dev/sda和都组装成一个 Raid-5 阵列,上面有一个带LG 的VG (我想是的;我以前能够用手动安装它)。我目前的问题是,我无法让系统检测到 VG 并激活它。不到 20 分钟前,它还运行正常(我在上次启动时遇到过这个问题,但没有记下上次启动系统时实际激活 VG 所采取的步骤)。/dev/sdb/dev/sdc/dev/sdd/dev/md0mediapart1vgchange -ay media && mount /dev/mapper/media-part1

团队组装得很好,也很干净,但我无法让 VG 显示或安装。pvck /dev/md0显示:
Device /dev/md0 not found (or ignored by filtering).
我的过滤器/etc/lvm/lvm.conffilter = [ "a/.*/" ]

pvck /dev/md0p1显示:
Could not find LVM label on /dev/md0p1

pvdisplay产生以下输出:

 Setting global/locking_type to 1
  Setting global/wait_for_locks to 1
  File-based locking selected.
  Setting global/locking_dir to /var/lock/lvm
  Locking /var/lock/lvm/P_global RB
Scanning for physical volume names
  /dev/ram0: No label detected
  /dev/md0p1: Label for sector 1 found at sector 0 - ignoring
  /dev/md0p1: No label detected
  /dev/ram1: No label detected
  /dev/sda1: Label for sector 1 found at sector 0 - ignoring
  /dev/sda1: No label detected
  /dev/ram2: No label detected
  /dev/ram3: No label detected
  /dev/ram4: No label detected
  /dev/ram5: No label detected
  /dev/ram6: No label detected
  /dev/ram7: No label detected
  /dev/ram8: No label detected
  /dev/ram9: No label detected
  /dev/ram10: No label detected
  /dev/ram11: No label detected
  /dev/ram12: No label detected
  /dev/ram13: No label detected
  /dev/ram14: No label detected
  /dev/ram15: No label detected
  /dev/sdb1: No label detected
  /dev/sde1: No label detected
  /dev/sdf1: No label detected
  /dev/sdg1: No label detected
  /dev/sdh1: No label detected
  /dev/sdi1: No label detected
  /dev/root: No label detected
  /dev/sdj3: No label detected
  /dev/sdj4: No label detected
  /dev/sdj5: No label detected
  /dev/sdj6: No label detected
  Unlocking /var/lock/lvm/P_global

/dev/m0p1是 PV 应该存储的位置,但它没有显示。遗憾的是,我没有/etc/lvm/backup之前安装的目录。

我很确定数据都在那里,我只需要知道
a)我如何强制 lvm 在/dev/md0设备上搜索卷组,以及
b)我该如何修复此问题,以便系统在启动时检测并激活卷组(RAID 阵列在启动时已经组装)。

我不确定我是否完全理解 LVM 在物理设备上的具体位置,因此如果我的术语出现混淆,请纠正它。(PV 是物理设备,VG 位于一个或多个 PV 之上,并且 VG 中有一个或多个 LV,有点像传统硬盘中的分区?)

我当前的 lvm.conf(由 提供lvm dumpconf)是:

 devices {
    dir="/dev"
    scan="/dev/disk"
    preferred_names=[]
    filter="a/.*/"
    cache_dir="/etc/lvm/cache"
    cache_file_prefix=""
    write_cache_state=1
    sysfs_scan=1
    md_component_detection=1
    md_chunk_alignment=1
    data_alignment_detection=1
    data_alignment=0
    data_alignment_offset_detection=1
    ignore_suspended_devices=0
  }
  dmeventd {
    mirror_library="libdevmapper-event-lvm2mirror.so"
    snapshot_library="libdevmapper-event-lvm2snapshot.so"
  }
  activation {
    udev_sync=1
    missing_stripe_filler="error"
    reserved_stack=256
    reserved_memory=8192
    process_priority=-18
    mirror_region_size=512
    readahead="auto"
    mirror_log_fault_policy="allocate"
    mirror_device_fault_policy="remove"
  }
  global {
    umask=63
    test=0
    units="h"
    si_unit_consistency=1
    activation=1
    proc="/proc"
    locking_type=1
    wait_for_locks=1
    fallback_to_clustered_locking=1
    fallback_to_local_locking=1
    locking_dir="/var/lock/lvm"
    prioritise_write_locks=1
  }
  shell {
    history_size=100
  }
  backup {
    backup=1
    backup_dir="/etc/lvm/backup"
    archive=1
    archive_dir="/etc/lvm/archive"
    retain_min=10
    retain_days=30
  }
  log {
    verbose=0
    syslog=1
    overwrite=0
    level=0
    indent=1
    command_names=0
    prefix="  "
  }

编辑:看来 LVM 拒绝扫描 MD 设备。

dandroid@tinuvael:/etc/lvm$ sudo vgcfgrestore --test --verbose media
 Test mode: Metadata will NOT be updated.
 Wiping cache of LVM-capable devices
 Couldn't find device with uuid 'iTmyql-LYQv-N1GD-6aM0-BHco-uHEe-taHhBI'.
 Cannot restore Volume Group media with 1 PVs marked as missing.
 Restore failed.
 Test mode: Wiping internal cache
 Wiping internal VG cache

dandroid@tinuvael:/etc/lvm$ sudo blkid
/dev/md0: UUID="iTmyql-LYQv-N1GD-6aM0-BHco-uHEe-taHhBI" TYPE="LVM2_member" /dev/sdc: UUID="b81c877f-6542-d03b-4e08-ceb6032f5cfe" TYPE="linux_raid_member" /dev/sdd: UUID="b81c877f-6542-d03b-4e08-ceb6032f5cfe" TYPE="linux_raid_member"

我已经修剪了几行不相关的内容,但上面显示 raid 阵列已安装并且具有 LVM 正在搜索的 UUID,但在添加到types = [ "md", 16 ]我的配置后它仍然继续忽略该设备。

答案1

事实证明,驱动器上添加了分区表(可能是我在捣鼓并试图让 BIOS 在启动时引导正确的驱动器时添加的),而 LVM 绝对拒绝查看包含分区表的设备。使用 清空分区表后fdisk,LVM 完美地检测到了卷组。

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