I'm hoping that this is simpler than I think it is. :-)
We routinely clone our boot disks using a fairly simple script that:
1) Copies the source disk's partition layout to the target disk using
[i]prtvtoc[/i], [i]fmthard[/i] and [i]installboot.[/i]
2) Using a list, runs [i]newfs[/i] against the target slice and [i]ufsdump[/i]
of the source slice piped to a [i]ufsrestore[/i] of the target slice.
The result is a bootable clone of the source disk. Granted, there are
vulnerabilities with using ufsdump on a mounted file system but it works for us.
We're now looking at using ZFS file systems for /usr, /var, /opt, /export/home,
etc., leaving the root file system ("/") as UFS and swap as a bare slice as it
is now.
I've successfully created an Alternate Root Pool and have replicated the ZFS
file systems from another source [i]zpool[/i] into the Alternate Root Pool
using "zfs send" and "zfs receive". Right now, I'm doing this without the
benefit of a bootable system to play with. I'm experimenting with just
ordinary file systems, [b][i]not[/i][/b] "/ufs", "/opt", etc. Now comes the
"chicken and the egg" part.
I think I would have to fix-up the mount points of the newly copied ZFS file
systems on the Alternate Root Pool so that they remain set to "/ufs", "/opt",
etc. By the way, would these file systems have to be "legacy" mount points?
It seems like they would have to be.
Here's the part that makes my head hurt: If I've created this Alternate Root
Pool on this separate disk slice and populated it and exported it and I've
replicated a UFS root ("/") file system on that same disk but in slice 0, how
does that zpool get connected when I try to boot that cloned disk?
Fundamentally, the question is, how does one replicate a boot/system disk that
contains zpool(s) for file systems other than the root file system?
This is fairly straightforward with UFS file system technology. The addition
of zpool identity seems to complicate the issue considerably.
Thank you very much for any advice or clarification.
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