SUMMARY: confirmation of a theory (regarding A3500 disks) (fwd)

From: Adam and Christine Levin <>
Date: Wed Apr 30 2003 - 11:34:23 EDT
Thanks to Morgan Jones <> and
Sydney Weinstein <>.  Both confirmed that I can do what I
thought I could.  The one thing to be aware of is that growfs will lock
the filesystem while growing (which is mentioned in the growfs manpage,
along with a way to alleviate the problem using the -s flag).

Original question below.

Thanks very much,

We have a machine with an A3500 attached.  It has four LUNs mounted:

Each is around 300GB.

We just added another A3500, because we need bigger disk volumes.  What
I'd like to do is unmount the existing volumes, create DiskSuite
metadevices out of them, and then create concats with the four new
volumes, so we'd have:

d10 = c4t5d0s0 + c8t5d0s0
d20 = c4t5d1s0 + c8t5d1s0
d30 = c5t5d0s0 + c9t5d0s0
d40 = c5t5d1s0 + c9t5d1s0

Then, I'd just growfs the volumes to be 600GB each.

I'm pretty sure this should work.  The main questionable part is whether
taking the curret /dev/dsk/c4t5d0s0 (etc) and making metadevices out of
them will somehow disrupt the data.  I know that when we mirror root
disks, we just create d0 with /dev/dsk/c0t0d0s0, and nothing bad happens,
so I think this will work.  Can anybody confirm that?

I'd rather do it this way than have to copy the data from the original
LUNs to metadevices made out of the new LUNs in the second unit -- that
could take quite a while.

Thanks very much,
sunmanagers mailing list
Received on Wed Apr 30 11:36:54 2003

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