zpool – Giovanni F. Mazzeo De Santolo

Fix ZFSonLinux pool auto expanding

Giovanni — Mon, 24 Jul 2017 05:00:16 +0000

If you’re having issues with zfsonlinux and your pool not expanding after replacing your hard drives with larger ones then here is a trick to fix it.

# zpool set autoexpand=on {pool name}

# zpool online -e {pool-name} {disk name/id as displayed on zpool status}

Your pool should resize after running the second command. The first command was only to make sure you had set the zfs property that’s needed for the second command to expand the pool.

Create a Storage Pool

Giovanni — Sun, 02 May 2010 22:11:35 +0000

This will create a pool named “gpool” using RAIDZ (raid5) with member drives c8t1d0 c8t2d0 c8t3d0 c8t4d0 c8t5d0

Giovanni@server:~# zpool create gpool raidz c8t1d0 c8t2d0 c8t3d0 c8t4d0 c8t5d0
Giovanni@server:~# zpool status
pool: gpool
state: ONLINE
scrub: none requested
config:

NAME        STATE     READ WRITE CKSUM
gpool       ONLINE       0     0     0
raidz1    ONLINE       0     0     0
c8t1d0 ONLINE       0     0     0
c8t2d0 ONLINE       0     0     0
c8t3d0 ONLINE       0     0     0
c8t4d0 ONLINE       0     0     0
c8t5d0 ONLINE       0     0     0

errors: No known data errors

pool: rpool
state: ONLINE
scrub: none requested
config:

NAME        STATE     READ WRITE CKSUM
rpool       ONLINE       0     0     0
c8t0d0s0 ONLINE       0     0     0

errors: No known data errors
Giovanni@server:~#

OK.

How to view available SATA hard drives

Giovanni — Sun, 02 May 2010 21:41:27 +0000

You will be able to view hardware ID’s for hard drives using ‘format’

Giovanni@server:~# format
Searching for disks…done
AVAILABLE DISK SELECTIONS:
0. c8t0d0
/pci@0,0/pci15d9,d380@1f,2/disk@0,0
1. c8t1d0
/pci@0,0/pci15d9,d380@1f,2/disk@1,0
2. c8t2d0
/pci@0,0/pci15d9,d380@1f,2/disk@2,0
3. c8t3d0
/pci@0,0/pci15d9,d380@1f,2/disk@3,0
4. c8t4d0
/pci@0,0/pci15d9,d380@1f,2/disk@4,0
5. c8t5d0
/pci@0,0/pci15d9,d380@1f,2/disk@5,0
Specify disk (enter its number):

Hard drives are located on /dev/dsk in Opensolaris. Compare to the zpool status and add drives that are new to the system (not yet in any storage pools)