> zpool create tank raidz2 da0 da1 da2 da3 da4 da5 da6 da7
> 
> and after a reboot the device names for some reason are changed so da2
> and da5 are swapped, either by altering the LUN setting on the storage
> or by switching cables/swapping disks etc.?
> 
> How will zfs handle that? Will it simply acknowledge that all devices
> are present and the pool is intact and report online or will it
> complain?

It should simply work.

> The reason I ask is that six months ago I had two seperate storage
> systems on veritas volume manager (vxfs) attached to my
> solaris-9-nfs-server via a fiber-switch. I migrated all volumes from
> the smaller storage-system to the larger one and disconnected it. All
> went fine and the system was humming along.
> 
> The fiber-switch rebooted three weeks ago and some of the devices
> (LUN's) went into state failing as seen by veritas so I had to online
> the devices and fsck the volumes that went offline. The tape-drive
> also took a hit and so I did a devfsadm to have the devices
> (re)created. But then a device changed name from c3t1d0s2 to c3t0d0s2
> and now veritas report the disk as missing and one volume as
> unavailable.

Both VxVM and ZFS use similar schemes.  They can make use of a local
file that enumerates non-disk devices as storage spaces, and they scan
for attached disks looking for a signature that identifies it as a
ZFS/VxVM component.

Data within the storage identifies its place in the pool or diskgroup.
As long as the disk can be "seen" by the OS, the specific access name
shouldn't matter.

Without more details, it's impossible to guess what happened with your
previous setup, but the general case of renaming (offline!) storage
should not affect either ZFS or VxVM.

-- 
Darren Dunham                                           [EMAIL PROTECTED]
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
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