For those of us outside of Sun:

With ZFS on the way, I thought I’d gather up from some of my resources and create a ZFS cheatsheet so you can get ready for whats to come:

There are two main commands for ZFS, “zfs” and “zpool”

"zpool list" - Show current usage on zfs pools
"zpool iostat 5" - Display I/O stats for zfs pools
"zpool vdevs" - Shows current mirror/pool device properties
"zpool create pool c0t3d0 c1t1d0 c4t4d0 c5t2d0" - Creates a pool consisting of c0t3d0 c1t1d0, c4t4d0, c5t2d0
"zpool create -fv pool slice1 slice2" - Creates a pool consisting of slice1 and slice2
"zpool create pool mirror c1t0d0 c2t0d0" - Creates a mirror consisting of c2t0d0 and c2t0d0
"zpool add -f pool mirror c0t1d0s3 c0t1d0s4" - Adds mirror to pool

"zfs list" - Show current zfs filesystems
"zfs create pool/filesystem" - Creates filesystem under pool
"zfs create pool/filesystem /mountpoint" - Creates filesystem under pool and mounts it to mountpoint
"zfs snapshot pool/filesystem@snapshotname" - Takes snapshot of filesystem
"zfs mount pool/filesystem /mountpoint" - Mounts a zfs filesystem to mountpoint
"zfs destroy pool/filesystem" - Deletes filesystem from pool
"zfs destroy pool" - Deletes pool

Notes on ZFS:
(From what I’ve gathered, may not be correct)

Package Name: SUNWzfs

You can’t convert a UFS filesystem to a ZFS filesystem as of yet, this means if you want ZFS you will have to install Solaris 10 Express from scratch.

If upgrading, ZFS can be used on new disks but not on existing UFS disks.

If there is a bad checksum on a disk, ZFS will grab the good checksum from another disk in the mirror and self heal.

You can use part of a pool for additional swap space.

Other operating systems can’t mount ZFS volumes as of yet.

There is never a need to fsck a ZFS filesystem.

This entry was posted on Friday, November 4th, 2005 at 5:58 pm and is filed under Useful Commands, SMF/ZFS/Zones, General. You can follow any responses to this entry through the RSS 2.0 feed. Responses are currently closed, but you can trackback from your own site.