SUMMARY: cloning boot drive

From: Grant Lowe <>
Date: Wed Nov 10 2004 - 17:15:54 EST
Hi gurus.
Another problem solved.  First thanks to the following for their help:
Drew Skinner
Michael Horton
Darren Dunham
No Spam (
Alex Theodore
Thomas M. Payerle
Frederick Hughes
Bruce Kirkland
Everybody gave got lots of good advice.  Some mentioned why I would use dd.  I thought dd might help because of SDS's screwiness.  Others suggest using a flash archive.  Drew Skinner gave me just about everything I need, which I include here as it includes the way I went forward.  I add to it something at the end.
Assume the following layout and adjust for your site (# devices, etc):

Primary Mirror	Subdevices	Disk
d0		d10,  d20	/dev/dsk/c0t0d0s0 /dev/dsk/c0t1d0s0
d1		d11,  d21	/dev/dsk/c0t0d0s1 /dev/dsk/c0t1d0s1
d3		d13,  d23	/dev/dsk/c0t0d0s3 /dev/dsk/c0t1d0s3
metadb databases		/dev/dsk/c0t0d0s7 /dev/dsk/c0t1d0s7

Then issue:

metadetach d0 d20
metadetach d1 d21
metadetach d3 d23
metadb -d /dev/dsk/c0t1d0s7
metaclear d20
metaclear d21
metaclear d23

-- This second disk will boot the new server. ( /dev/dsk/c0t1d0s0 will 
become /dev/dsk/c0t0d0s0 on the new 220 ). Next steps:

mkdir /a
mount /dev/dsk/c0t1d0s0 /a
vi /a/etc/vfstab  <== Change all references of /dev/md/dsk/d? to the 
logical disk eg:  /dev/dsk/c0t0d0s0  and  /dev/rdsk/c0t0d0s0
Close the file.
vi /a/etc/system  <== Verify that a metaroot is not specified.
Close the file.

When ready issue an "init 0"  -- there is now way to offline a standard 
SCSI device in a 220 that I'm aware of (or have tried to use). Once at 
the OK prompt pull the drive and put it in the correct slot of the new 
220; at the same time replacing the donor drive with one from the other 

Issue a "boot" to the old system. Down time can be as low as 3 mins.
Issue a "boot -r" to the new 220. If the new 220 doesn't come up try 
switching the slot the disk is in.

On System #1 run format, matching the partitions to the old disks.
Then add back the metadevice databases:
metadb -a -c3 /dev/dsk/c0t1d0s7
metainit d20 1 1 /dev/dsk/c0t1d0s0
metainit d21 1 1 /dev/dsk/c0t1d0s1
metainit d23 1 1 /dev/dsk/c0t1d0s3
metattach d0 d20
metattach d1 d21
metattach d3 d23

==>  Allow the system time to resync before rebooting any further.

On the new system:  Recreate all the mirrors from scratch as a new SDS 
install. First run format to match the donated drives partition sizes.


metadb -a -f -c3 /dev/dsk/c0t0d0s7
metadb -a -c3 /dev/dsk/c0t1d0s7
metainit d10 1 1 /dev/dsk/c0t0d0s0
metainit d11 1 1 /dev/dsk/c0t0d0s1
metainit d13 1 1 /dev/dsk/c0t0d0s3
metainit d0 -m d10
metainit d1 -m d11
metainit d3 -m d13
vi /etc/vfstab  <==  Change all mount points **Except root** to 
/dev/md/dsk/d1 (etc) and /dev/md/rdsk/d1 ....
Save the file.
metaroot d0  <== Assuming the root filesystem
lockfs -fa

After reboot create the other half of the mirrors (per the first server 
I would like to add that the 220 does have hot-swappable capabilities, so there was no downtime for the original machine.
sunmanagers mailing list
Received on Wed Nov 10 17:16:33 2004

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