最後更新: 2024-10-23

目錄

• Create disk fault
• Replace Fault Disk

Create disk fault

[方式1]

position=$(cat /dev/urandom | tr -dc 0-9 | head -c 8)

echo $position

dd if=/dev/random of=/home/storage/fault_disk bs=512 count=1 seek=$position

 * For simple storage pools, metadata is dual redundant, but data is not redundant.

[方式2]

#  扮斷線

virsh qemu-monitor-command rocky8 --hmp device_del scsi0-0-0-2

# Connect 返

id="drive-scsi0-0-0-2"

virsh qemu-monitor-command rocky8  --hmp drive_add 0 \
  file=/mnt/raid/rockylinux/data2.raw,format=raw,if=none,id=$id

block_size="logical_block_size=4096,physical_block_size=4096"

virsh qemu-monitor-command rocky8 --hmp device_add \
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=2,drive=${id},id=scsi0-0-0-2,${block_size}

virsh qemu-monitor-command rocky8 --hmp info block

Replace Fault Disk

Step1: Find faulted disk

nas: ~ # zpool status

# 沒有 reboot 時

  pool: lxc
 state: DEGRADED
status: One or more devices are faulted in response to persistent errors.
        Sufficient replicas exist for the pool to continue functioning in a
        degraded state.
action: Replace the faulted device, or use 'zpool clear' to mark the device
        repaired.
config:

        NAME        STATE     READ WRITE CKSUM
        lxc         DEGRADED     0     0     0
          mirror-0  DEGRADED     0     0     0
            sda1    FAULTED      4   117     0  too many errors
            sdb1    ONLINE       0     0     0

errors: No known data errors

# reboot 後 (sdb 變成了 sda, 因為 device 沒有 fix name)

config:

        NAME                     STATE     READ WRITE CKSUM
        lxc                      DEGRADED     0     0     0
          mirror-0               DEGRADED     0     0     0
            3580605110681011631  FAULTED      0     0     0  was /dev/sda1
            sda1                 ONLINE       0     0     0

 * 有半死的 Disk 時別 reboot, 因為 sdb 有機會變成 sda, 之後影響了 pool

[方式1] offline, online

zpool offline lxc sda1

zpool status | grep sda1

sda1    OFFLINE      4   165     0

zpool online lxc sda1

warning: device 'sda1' onlined, but remains in faulted state
use 'zpool clear' to restore a faulted device

zpool scrub lxc

zpool clear lxc sda1

zpool status

[方式2] zpool replace

zpool replace lxc sdc1

[方式3] detach & attach

Step1: detach fault disk from pool

zpool detach MyPool /dev/ada3

OR

zpool detach MyPool 9179400675110531610

detach 後

nas: ~ # zpool status

  pool: MyPool
 state: ONLINE
  scan: resilvered 21.2G in 0h24m with 0 errors on Mon Oct 28 23:54:28 2013
config:

        NAME        STATE     READ WRITE CKSUM
        MyPool      ONLINE       0     0     0
          ada1      ONLINE       0     0     0

errors: No known data errors

* mirror 不見了

Step2:  add disk back to pool

zpool attach MyPool ada1 /dev/ada3                  # /dev/ada3 係新 disk

attach 後

nas: ~ # zpool status
  pool: MyPool
 state: ONLINE
status: One or more devices is currently being resilvered.  The pool will
        continue to function, possibly in a degraded state.
action: Wait for the resilver to complete.
  scan: resilver in progress since Mon Oct 28 23:30:06 2013
        1.22G scanned out of 21.2G at 10.6M/s, 0h32m to go
        1.22G resilvered, 5.77% done
config:

        NAME        STATE     READ WRITE CKSUM
        MyPool      ONLINE       0     0     0
          mirror-0  ONLINE       0     0     0
            ada1    ONLINE       0     0     0
            ada3    ONLINE       0     0     0  (resilvering)

errors: No known data errors