freenas:replace_a_drive
Table of Contents
FreeNAS - Replace a Drive
The GUI informs that the zpool is degraded.
List the Pools
zpool list
returns:
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT Pool1 43.5T 35.6T 7.94T - - 10% 81% 1.00x ONLINE /mnt freenas-boot 216G 5.08G 211G - - 0% 2% 1.00x ONLINE -
Check the status of the Pool
zpool status Pool1
returns:
pool: Pool1 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://illumos.org/msg/ZFS-8000-9P config: NAME STATE READ WRITE CKSUM Pool1 ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 gptid/2d35e96c-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 0 gptid/2d41dcbd-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 40 too many errors gptid/2ddb5cb2-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 0 errors: No known data errors
NOTE: This shows the disks within the Pool.
It also shows that device 2d41dcbd-b611-11ea-be33-00d861fcb7d8 has errors.
Determine the actual disk connected to that device
glabel status | grep 2d41dcbd
returns:
gptid/2d41dcbd-b611-11ea-be33-00d861fcb7d8 N/A ada3p2
NOTE: This shows that the disk is /dev/ada3
Determine the Serial Number of the Disk
sudo camcontrol identify ada3 | grep serial
returns:
serial number ZL21DEPA
- Power off the system.
- Pull the failed drive and replace it with a new drive.
- Reboot.
- Navigate back and find the OFFLINE disk.
NOTE: It will be the one with a series of numbers rather than a device name, and click the Replace button and select the new device (should be the only one on the list).
Since this drive is entirely new and unpartitioned, you'll need to force the replacement.
After that, it's just a matter of sitting back while the volume performs the resilver operation.
Estimate how long it will take to resilver
zpool status -v Pool1
returns:
pool: Pool1 state: ONLINE tatus: 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 Jan 12 12:34:19 2014 16.3G scanned out of 15.85T at 592M/s, 8h12m to go 1.4G resilvered, 9.82% done config: NAME STATE READ WRITE CKSUM Pool1 ONLINE 0 0 0 raidz1-0 ONLINE 0 0 0 gptid/2d35e96c-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 0 gptid/11111111-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 0 (resilvering) gptid/2ddb5cb2-b611-11ea-be33-00d861fcb7d8 ONLINE 0 0 0 errors: No known data errors
NOTE: Notice the resilvered disk has a new id, starting 11111111, which will differ as it is a different disk.
freenas/replace_a_drive.txt · Last modified: 2020/12/21 18:45 by peter