dmsetup remove dm device solve : zpool error:one or more vdevs refer to the same device-白红宇

这是一个OCZ的SSD, 一般用一半以内的容量是性能比较好, 所以480G的SSD, 我分了220G给ZFS缓存.

但是注意对其的问题.

# fdisk -c -u /dev/sda

开始位置2048

新增块数2048*1024*220-1=461373439

因为原来配置的块未对其, 所以准备重新分一下 :

查看cache设备 :

# zpool status  pool: zp1 state: ONLINE  scan: none requestedconfig:        NAME                                            STATE     READ WRITE CKSUM        zp1                                             ONLINE       0     0     0          mirror-0                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c8a06200099      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c92069983cb      ONLINE       0     0     0          mirror-1                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c9a0712503c      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2ca2078b4231      ONLINE       0     0     0          mirror-2                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2ca907f2b840      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2cb0085a22e6      ONLINE       0     0     0          mirror-3                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2cba08f37c32      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d340486b1c4      ONLINE       0     0     0          mirror-4                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d3b04e93404      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d42054f21b8      ONLINE       0     0     0          mirror-5                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d4905bed3f3      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d4f061c3f88      ONLINE       0     0     0        logs          wwn-0x6b083fe0d17216001c1b2c7f056bd76c-part3  ONLINE       0     0     0        cache          wwn-0x5e83a977e08cba3e-part1                  ONLINE       0     0     0

删除cache设备

# zpool remove zp1 wwn-0x5e83a977e08cba3e-part1

重新对ssd分区 :

# fdisk -c -u /dev/sdaDevice contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabelBuilding a new DOS disklabel with disk identifier 0xb641c765.Changes will remain in memory only, until you decide to write them.After that, of course, the previous content won't be recoverable.Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)Command (m for help): dSelected partition 1Command (m for help): nCommand action   e   extended   p   primary partition (1-4)pPartition number (1-4): 1First sector (2048-937766396, default 2048): Using default value 2048Last sector, +sectors or +size{K,M,G} (2048-937766396, default 937766396): +461373439

重新分完, 添加回去报错

# zpool add zp1 cache /dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1cannot open '/dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1': Device or resource busycannot add to 'zp1': one or more vdevs refer to the same device

dd 这个设备亦无变化, 一开始我以为是头信息的问题 :

# dd if=/dev/zero of=/dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1 bs=1k count=1024# zpool add zp1 cache /dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1cannot open '/dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1': Device or resource busycannot add to 'zp1': one or more vdevs refer to the same device

真实原因是这个设备被device mapper占用了.

# dmsetup  lssda1    (253:0)

删除这个dm设备 :

# dmsetup remove /dev/disk/by-id/dm-name-sda1ata-OCZ-REVODRIVE3_X2_OCZ-9XJBU029CT3M3U56           scsi-SATA_OCZ-REVODRIVE3_OCZ-9XJBU029CT3M3U56ata-OCZ-REVODRIVE3_X2_OCZ-9XJBU029CT3M3U56-part1     scsi-SATA_OCZ-REVODRIVE3_OCZ-9XJBU029CT3M3U56-part1dm-name-sda1                                         wwn-0x5e83a977e08cba3edm-uuid-part1-sda

现在添加cache成功了, 省去了重启的烦恼.

# zpool add zp1 cache /dev/disk/by-id/wwn-0x5e83a977e08cba3e-part1# zpool status  pool: zp1 state: ONLINE  scan: none requestedconfig:        NAME                                            STATE     READ WRITE CKSUM        zp1                                             ONLINE       0     0     0          mirror-0                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c8a06200099      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c92069983cb      ONLINE       0     0     0          mirror-1                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2c9a0712503c      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2ca2078b4231      ONLINE       0     0     0          mirror-2                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2ca907f2b840      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2cb0085a22e6      ONLINE       0     0     0          mirror-3                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2cba08f37c32      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d340486b1c4      ONLINE       0     0     0          mirror-4                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d3b04e93404      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d42054f21b8      ONLINE       0     0     0          mirror-5                                      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d4905bed3f3      ONLINE       0     0     0            wwn-0x6b083fe0d17216001c1b2d4f061c3f88      ONLINE       0     0     0        logs          wwn-0x6b083fe0d17216001c1b2c7f056bd76c-part3  ONLINE       0     0     0        cache          wwn-0x5e83a977e08cba3e-part1                  ONLINE       0     0     0