For one time this blog post will not be around Telecom and Cisco/Juniper/Nokia or something like this.
Just to keep in mind how to replace a faulty device in a ZFS pool.
I have :
root@pve:~# zpool status -x root@pve:~# zpool status pool: pve-zfs state: DEGRADED status: One or more devices could not be used because the label is missing or invalid. Sufficient replicas exist for the pool to continue functioning in a degraded state. action: Replace the device using 'zpool replace'. see: http://zfsonlinux.org/msg/ZFS-8000-4J scan: resilvered 41.9M in 0 days 00:00:11 with 0 errors on Sun Jul 24 13:38:51 2022 config: NAME STATE READ WRITE CKSUM pve-zfs DEGRADED 0 0 0 mirror-0 DEGRADED 0 0 0 wwn-0x50014ee267b78b52 ONLINE 0 0 0 2534239155907356895 FAULTED 0 0 0 was /dev/sdb1 mirror-1 ONLINE 0 0 0 wwn-0x50014ee267b63342 ONLINE 0 0 0 wwn-0x50014ee2bd0cf6b4 ONLINE 0 0 0 errors: No known data errors
But how to replace this faulty device when all the howto on the net talk about replace/make offline the old disk… But in my situation I have made an RMA on the disk and don’t have mind to make the faulty device offline.
Nevertheless, I have replaced my 2TB disk with a new one, such as :
But If I made :
root@pve:~# zpool replace pve-zfs 2534239155907356895 ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN invalid vdev specification use '-f' to override the following errors: /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN-part1 contains a filesystem of type 'ntfs'
After make a little apt-get install parted :
root@pve:~# parted /dev/sda GNU Parted 3.2 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) print Model: ATA WDC WD20EFRX-68E (scsi) Disk /dev/sda: 2000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags 1 1049kB 2000GB 2000GB primary ntfs (parted) rm 1 (parted) print Model: ATA WDC WD20EFRX-68E (scsi) Disk /dev/sda: 2000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Disk Flags: Number Start End Size Type File system Flags (parted) mklabel GPT Warning: The existing disk label on /dev/sda will be destroyed and all data on this disk will be lost. Do you want to continue? Yes/No? Yes (parted) q Information: You may need to update /etc/fstab. root@pve:~#
So :
root@pve:~# zpool replace pve-zfs 2534239155907356895 ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN
root@pve:~# zpool status -x
pool: pve-zfs
state: DEGRADED
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 Sun Jul 24 14:23:11 2022
10.5G scanned at 716M/s, 4.04G issued at 276M/s, 450G total
0B resilvered, 0.90% done, 0 days 00:27:37 to go
config:
NAME STATE READ WRITE CKSUM
pve-zfs DEGRADED 0 0 0
mirror-0 DEGRADED 0 0 0
wwn-0x50014ee267b78b52 ONLINE 0 0 0
replacing-1 DEGRADED 0 0 0
2534239155907356895 FAULTED 0 0 0 was /dev/sdb1
ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN ONLINE 0 0 0
mirror-1 ONLINE 0 0 0
wwn-0x50014ee267b63342 ONLINE 0 0 0
wwn-0x50014ee2bd0cf6b4 ONLINE 0 0 0
errors: No known data errors
root@pve:~#
How I get the new device name :
root@pve:~# ls -l /dev/disk/by-id | grep J8KN lrwxrwxrwx 1 root root 9 Jul 24 14:23 ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN -> ../../sda lrwxrwxrwx 1 root root 10 Jul 24 14:23 ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Jul 24 14:23 ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M1EUJ8KN-part9 -> ../../sda9 root@pve:~#
Where “J8KN” is a pattern of the Serial Number you can pick on the new disk.