缺少第二个逻辑区

Question

编辑1:只是为了澄清没有数据被写入到新的范围。我知道这一点，因为管理员在执行lv可扩展性之后就使用fdisk生成了文件系统，然后重新启动以使更改生效。重新启动时，新的块设备丢失了。

以下是sys管理员所做的工作。

添加了一个新的块设备，然后他将新的块设备添加到现有的卷组中，然后决定对卷组执行一个扩展：

vgextend archive1-retain /dev/sdd1
lvextend -l +31 /dev/archive1-retain/data

本质上是用新的物理卷扩展卷组。然后他重新启动并以某种方式失去了新的物理卷成员(sdd1)。但是，逻辑卷挂载，所有数据看起来都完好无损。

我确信，在意外添加第二个逻辑范围(sdd1)之后，实际上没有向卷组写入任何数据。下面是我剩下的内容，请注意第二个逻辑范围上的未知(缺失)设备，这是预期的：

archive1:~ # lvdisplay -am
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059711488: Input/output error
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059768832: Input/output error
  Couldn't find device with uuid W0btGW-Zp3R-yoAC-dkow-PabM-1Vri-3VUQo1.
  --- Logical volume ---
  LV Name                /dev/archive1-retain/data
  VG Name                archive1-retain
  LV UUID                fLG6tU-6tla-h49c-KOf2-LIAh-uIFy-wH0XB5
  LV Write Access        read/write
  LV Creation host, time archive1, 2015-06-12 11:50:30 -0700
  LV Status              available
  # open                 1
  LV Size                4.00 TiB
  Current LE             65566
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     1024
  Block device           253:3

  --- Segments ---
  Logical extent 0 to 65534:
    Type                linear
    Physical volume     /dev/sda
    Physical extents    0 to 65534

  Logical extent 65535 to 65565:
    Type                linear
    Physical volume     unknown device
    Physical extents    0 to 30

这是我试过的。回首过去，我不应该使用武力，但幸运的是，当时的音量被装上了：

archive1:~ # vgreduce archive1-retain --removemissing
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059711488: Input/output error
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059768832: Input/output error
  Couldn't find device with uuid W0btGW-Zp3R-yoAC-dkow-PabM-1Vri-3VUQo1.
  WARNING: Partial LV data needs to be repaired or removed.
  There are still partial LVs in VG archive1-retain.
  To remove them unconditionally use: vgreduce --removemissing --force.
  Proceeding to remove empty missing PVs.

archive1:~ # vgreduce archive1-retain --removemissing --force
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059711488: Input/output error
  /dev/archive1-retain/data: read failed after 0 of 512 at 4400059768832: Input/output error
  Couldn't find device with uuid W0btGW-Zp3R-yoAC-dkow-PabM-1Vri-3VUQo1.
  Removing partial LV data.
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  device-mapper: remove ioctl on  failed: Device or resource busy
  Unable to deactivate archive1--retain-data (253:3)
  Unable to deactivate logical volume "data"

一些补充信息：

archive1:~ # lsblk
NAME                                     MAJ:MIN RM   SIZE RO MOUNTPOINT
xvdb                                     202:16   0   249G  0
└─xvdb1                                  202:17   0   249G  0 /var/log/retain-tomcat7
xvda                                     202:0    0    80G  0
├─xvda1                                  202:1    0     2G  0 [SWAP]
└─xvda2                                  202:2    0    78G  0 /
sda                                        8:0    0     4T  0
└─archive1--retain-data (dm-3)           253:3    0     4T  0 /var/opt/beginfinite/retain
sdc                                        8:32   0   750G  0
└─gwsystem-data (dm-0)                   253:0    0   750G  0 /gwsystem
sdb                                        8:16   0     1T  0
└─archive1--sql-data (dm-1)              253:1    0  1024G  0 /var/lib/mysql
archive1--retain-data-missing_1_0 (dm-2) 253:2    0     2G  0
└─archive1--retain-data (dm-3)           253:3    0     4T  0 /var/opt/beginfinite/retain

逻辑卷装入并可用：

archive1:~ # df -h
Filesystem                         Size  Used Avail Use% Mounted on
/dev/xvda2                          77G   35G   41G  46% /
udev                                19G  120K   19G   1% /dev
tmpfs                               19G     0   19G   0% /dev/shm
/dev/xvdb1                         246G   62G  172G  27% /var/log/retain-tomcat7
/dev/mapper/gwsystem-data          739G  590G  112G  85% /gwsystem
/dev/mapper/archive1--sql-data     1.0T  330G  695G  33% /var/lib/mysql
/dev/mapper/archive1--retain-data  4.0T  2.9T  1.2T  73% /var/opt/beginfinite/retain

Answer 1

在卸载FS之后，我会这样做：

步骤1-用于标识文件的vgcfgrestore -l具有正确的lvm元数据( sdd1扩展名之前的元数据)

步骤2-实际还原旧的lvm元数据的vgcfgrestore -f filename