I’m using ZFS for my main fileserver, this pool was created over 10 years ago.
Meanwhile i’ve: Swapped broken disks, switched disks for bigger ones and effectively resized my storage 2 or 3 times. Never had any corruption.
Yesterday i say a warning that one of the disks in the pool was OFFLINE.
Today i replaced it using below command’s
- Put the disk in OFFLINE mode (if needed, mine was already offline)
- zpool offline tank sdb
- Remove disk from system
- echo 1 | sudo tee /sys/block/sdb/device/delete
- Remove the disk physically
- Insert the replacement disk. And copy headers/structure from another disk
- sgdisk –replicate=/dev/sdb /dev/sda
- sgdisk –randomize-guids /dev/sdb
- Run the zpool replace command.
- zpool replace tank /dev/sdb
- Use online command to activate disk (no needed in my case, it already did that)
Tips:
# My labels with serials fell off :(
dd if=/dev/sdb of=/dev/null -> blinky led ..
# What is the serial?
sudo hdparm -i /dev/sdb | grep Serial
Output
root@latex:~# sgdisk --replicate=/dev/sdb /dev/sda
The operation has completed successfully.
root@latex:~# sgdisk --randomize-guids /dev/sdb
The operation has completed successfully.
root@latex:~# zpool replace tank /dev/sdb
root@latex:~# zpool status
pool: tank
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 Wed May 18 11:31:21 2022
5.64T scanned out of 14.4T at 331M/s, 7h42m to go
1.88T resilvered, 39.16% done
config:
NAME STATE READ WRITE CKSUM
tank DEGRADED 0 0 0
raidz1-0 DEGRADED 0 0 0
sda ONLINE 0 0 0
replacing-1 REMOVED 0 0 0
old REMOVED 0 0 0
sdb ONLINE 0 0 0 (resilvering)
sdc ONLINE 0 0 0
errors: No known data errors