ZFS: Difference between revisions

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= Links =
= Links =
 
*[https://openzfs.github.io/openzfs-docs/man/4/zfs.4.html zfs manpage]
*[http://zfsonlinux.org/ ZFS on Linux]  
*[http://zfsonlinux.org/ ZFS on Linux]  
*[https://wiki.gentoo.org/wiki/ZFS https://wiki.gentoo.org/wiki/ZFS]  
*[https://wiki.gentoo.org/wiki/ZFS https://wiki.gentoo.org/wiki/ZFS]  

Revision as of 08:52, 3 July 2023

Links

HOWTO

Create zfs filesystem

zfs create poolname/fsname

this also creates mountpoint

Replace disk in zfs

Some links

Get information first:

Name of disk

zpool status

Find uid of disk to replace

take it offline

zpool offline poolname ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5RLZC6V

Get the disk guid:

zdb

guid: 15233236897831806877

Get list of disk by id:

ls -al /dev/disk/by-id

Save the id, shutdown, replace disk, boot:

Find the new disk:

ls -al /dev/disk/by-id

Run replace command. The id is the guid of the old disk, name is of the new disk

zpool replace tank /dev/disk/by-id/13450850036953119346 /dev/disk/by-id/ata-ST4000VN000-1H4168_Z302FQVZ


Show pools with sizes

zpool list 

or

zpool list -H -o name,size

Swap on zfs

https://askubuntu.com/questions/228149/zfs-partition-as-swap

FAQ

invalid vdev specification

Probably means you need -f

Tuning arc settings

arcstat
arc_summary
grep c_max /proc/spl/kstat/zfs/arcstats
echo 5368709120 > /sys/module/zfs/parameters/zfs_arc_max

maybe you need

echo 3 > /proc/sys/vm/drop_caches

FAQ

show status and disks

zpool status

show drives/pools

zfs list
      

check raid level

zfs list -a