Re: diskutil createRAID question
Re: diskutil createRAID question
- Subject: Re: diskutil createRAID question
- From: email@hidden (Jack Howarth)
- Date: Mon, 20 Sep 2004 09:36:50 -0400 (EDT)
To answer my own question, it appears to be currently impossible
to use the device identifiers rather than the device itself to
create a RAID. If one has two identical SATA drives (each partitioned
with a single extended HFS partition) and boots off of a third drive
or a boot CD, the following command will fail under MacOS X 10.3.5...
diskutil createRAID mirror PantherMirror disk0s3 disk1s3
...where s3 is the slice containing the extended HFS partition on
each SATA drive. Diskutil fails with a message that
"Error -9983 encountered updating or creating raid on disk".
However the device form of this command succeeds...
diskutil createRAID mirror PantherMirror disk0 disk1
I would note that the failure of the first form of the command
using the device identifiers with the slice number fails in a
way that mangles the partition tables on those two drives so
you have to repartition them after the error in diskutil. The
reason I mention all of this is that this bug rules out the
possibility of having a set of mirrored 2-partition drives
under the current MacOS X releases.
Jack
ps At the very least the manpage for diskutil should be updated
to reflect this situation since it currently leads the user to
believe that one can use the disk identifier form (disk0s3)
with diskutil anywhere it takes a device name (disk0).
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