Linux
ZFS Raid-Z2 失敗，需要建構新池但缺少 SAS 埠。我可以從 Raid-Z2 斷開一個驅動器嗎？
我有一個帶有 6 * 4TB 驅動器的 Raid-Z2 池。所有驅動器的執行時間都超過 40 000 小時。現在它們似乎都在同時退化。池已降級，並且所有驅動器都標記為已降級並出現許多錯誤。但幸運的是，目前沒有失去數據。
NAME STATE READ WRITE CKSUM File DEGRADED 0 0 0 raidz2-0 DEGRADED 0 0 0 sda DEGRADED 0 0 0 too many errors sdb DEGRADED 0 0 0 too many errors sdc DEGRADED 0 0 0 too many errors sdd DEGRADED 0 0 0 too many errors sde DEGRADED 0 0 0 too many errors sdf DEGRADED 0 0 0 too many errors我想用 Raid-Z1 和 3 * 6TB 驅動器建構一個新池，因為我不需要原始池中的所有空間。我的問題是舊池有 6 個驅動器，而我的池將有 3 個，但我的 SAS 控制器只有 8 個埠。所以我想從我的 Raid-Z2 池中斷開一個磁碟，連接我的 3 個新驅動器並用它們創建一個新池，然後在舊池失敗之前通過複製到新池來保存我的數據。
那可能嗎？我的想法是舊池應該在缺少一個磁碟的情況下工作。但是當我嘗試斷開磁碟連接時，我無法訪問舊池中的任何數據。
有誰知道如何解決這個問題？
Zpool狀態-v：
pool: File state: DEGRADED status: One or more devices has experienced an unrecoverable error. An attempt was made to correct the error. Applications are unaffected. action: Determine if the device needs to be replaced, and clear the errors using 'zpool clear' or replace the device with 'zpool replace'. see: http://zfsonlinux.org/msg/ZFS-8000-9P scan: resilvered 6.82G in 0 days 00:04:00 with 0 errors on Sun Aug 23 21:21:15 2020 config: NAME STATE READ WRITE CKSUM File DEGRADED 0 0 0 raidz2-0 DEGRADED 0 0 0 sda DEGRADED 0 0 0 too many errors sdb DEGRADED 0 0 0 too many errors sdc DEGRADED 0 0 0 too many errors sdd DEGRADED 0 0 0 too many errors sde DEGRADED 0 0 0 too many errors sdf DEGRADED 0 0 0 too many errors errors: No known data errors所有磁碟都報告 SMART 狀態正常：
smartctl -H /dev/sda smartctl 7.1 2019-12-30 r5022 [x86_64-linux-5.4.55-1-pve] (local build) Copyright (C) 2002-19, Bruce Allen, Christian Franke, www.smartmontools.org === START OF READ SMART DATA SECTION === SMART Health Status: OK系統日誌似乎是空的：
root@boxvm:/var/log# cat syslog | grep sda root@boxvm:/var/log#dmesg 輸出似乎也很好：
dmesg | grep sda [ 8.997624] sd 1:0:0:0: [sda] Enabling DIF Type 2 protection [ 8.998488] sd 1:0:0:0: [sda] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.998847] sd 1:0:0:0: [sda] Write Protect is off [ 8.998848] sd 1:0:0:0: [sda] Mode Sense: df 00 10 08 [ 8.999540] sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.093385] sda: sda1 sda9 [ 9.096819] sd 1:0:0:0: [sda] Attached SCSI disk dmesg | grep sdb [ 8.997642] sd 1:0:1:0: [sdb] Enabling DIF Type 2 protection [ 8.998467] sd 1:0:1:0: [sdb] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.998828] sd 1:0:1:0: [sdb] Write Protect is off [ 8.998830] sd 1:0:1:0: [sdb] Mode Sense: df 00 10 08 [ 8.999524] sd 1:0:1:0: [sdb] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.087056] sdb: sdb1 sdb9 [ 9.090465] sd 1:0:1:0: [sdb] Attached SCSI disk dmesg | grep sdc [ 8.997812] sd 1:0:2:0: [sdc] Enabling DIF Type 2 protection [ 8.998639] sd 1:0:2:0: [sdc] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.998998] sd 1:0:2:0: [sdc] Write Protect is off [ 8.998999] sd 1:0:2:0: [sdc] Mode Sense: df 00 10 08 [ 8.999692] sd 1:0:2:0: [sdc] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.084259] sdc: sdc1 sdc9 [ 9.088030] sd 1:0:2:0: [sdc] Attached SCSI disk dmesg | grep sdd [ 8.997932] sd 1:0:3:0: [sdd] Enabling DIF Type 2 protection [ 8.998761] sd 1:0:3:0: [sdd] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.999120] sd 1:0:3:0: [sdd] Write Protect is off [ 8.999121] sd 1:0:3:0: [sdd] Mode Sense: df 00 10 08 [ 8.999818] sd 1:0:3:0: [sdd] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.103840] sdd: sdd1 sdd9 [ 9.107482] sd 1:0:3:0: [sdd] Attached SCSI disk dmesg | grep sde [ 8.998017] sd 1:0:4:0: [sde] Enabling DIF Type 2 protection [ 8.998839] sd 1:0:4:0: [sde] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.999234] sd 1:0:4:0: [sde] Write Protect is off [ 8.999235] sd 1:0:4:0: [sde] Mode Sense: df 00 10 08 [ 8.999933] sd 1:0:4:0: [sde] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.088282] sde: sde1 sde9 [ 9.091665] sd 1:0:4:0: [sde] Attached SCSI disk dmesg | grep sdf [ 8.998247] sd 1:0:5:0: [sdf] Enabling DIF Type 2 protection [ 8.999076] sd 1:0:5:0: [sdf] 7814037168 512-byte logical blocks: (4.00 TB/3.64 TiB) [ 8.999435] sd 1:0:5:0: [sdf] Write Protect is off [ 8.999436] sd 1:0:5:0: [sdf] Mode Sense: df 00 10 08 [ 9.000136] sd 1:0:5:0: [sdf] Write cache: disabled, read cache: enabled, supports DPO and FUA [ 9.090609] sdf: sdf1 sdf9 [ 9.094235] sd 1:0:5:0: [sdf] Attached SCSI diskdmesg 用於 SAS 控制器
root@boxvm:/var/log# dmesg | grep mpt2 [ 1.151805] mpt2sas_cm0: 64 BIT PCI BUS DMA ADDRESSING SUPPORTED, total mem (65793672 kB) [ 1.200012] mpt2sas_cm0: CurrentHostPageSize is 0: Setting default host page size to 4k [ 1.200023] mpt2sas_cm0: MSI-X vectors supported: 1 [ 1.200024] mpt2sas_cm0: 0 1 [ 1.200098] mpt2sas_cm0: High IOPs queues : disabled [ 1.200099] mpt2sas0-msix0: PCI-MSI-X enabled: IRQ 51 [ 1.200100] mpt2sas_cm0: iomem(0x00000000fc740000), mapped(0x00000000629d5dd1), size(65536) [ 1.200101] mpt2sas_cm0: ioport(0x000000000000d000), size(256) [ 1.254826] mpt2sas_cm0: CurrentHostPageSize is 0: Setting default host page size to 4k [ 1.281681] mpt2sas_cm0: scatter gather: sge_in_main_msg(1), sge_per_chain(9), sge_per_io(128), chains_per_io(15) [ 1.281746] mpt2sas_cm0: request pool(0x0000000074c49e3e) - dma(0xfcd700000): depth(3492), frame_size(128), pool_size(436 kB) [ 1.289333] mpt2sas_cm0: sense pool(0x00000000693be9f4)- dma(0xfcba00000): depth(3367),element_size(96), pool_size(315 kB) [ 1.289400] mpt2sas_cm0: config page(0x00000000f6926acf) - dma(0xfcb9ad000): size(512) [ 1.289401] mpt2sas_cm0: Allocated physical memory: size(1687 kB) [ 1.289401] mpt2sas_cm0: Current Controller Queue Depth(3364),Max Controller Queue Depth(3432) [ 1.289402] mpt2sas_cm0: Scatter Gather Elements per IO(128) [ 1.333780] mpt2sas_cm0: LSISAS2008: FWVersion(20.00.07.00), ChipRevision(0x03), BiosVersion(00.00.00.00) [ 1.333781] mpt2sas_cm0: Protocol=(Initiator,Target), Capabilities=(TLR,EEDP,Snapshot Buffer,Diag Trace Buffer,Task Set Full,NCQ) [ 1.334527] mpt2sas_cm0: sending port enable !! [ 2.861790] mpt2sas_cm0: host_add: handle(0x0001), sas_addr(0x590b11c0155b3300), phys(8) [ 8.996385] mpt2sas_cm0: port enable: SUCCESS
如果您的游泳池已經出現故障，那麼進一步降低它是一個非常糟糕的主意。如果所有磁碟一起出錯，則很可能是控制器或 PSU 出現故障，而不是磁碟出現故障。
作為第一步，您最好投資一個額外的控制器來掛起您的替換磁碟。