Hi, folks.
I think I may have painted myself into a corner, but I thought I'd ask here
before I undo what I've done so far. My configuration is as follows:
I have a hardware RAID with 2 logical drives defined. The second logical
drive (/dev/sdb) is dedicated entirely to LVM. When I set up LVM, I used
pvcreate /dev/sdb
to allocate the entire logical drive, rather than creating a partition
table and using
pvcreate /dev/sdb1
I then created a VG with just the single PV, and several LV's. It's all
working great, but I need to expand the available capacity.
Thinking this would be a simple operation, I added three new drives to the
RAID5 array, taking the available space from ~850GB to ~1.25TB. The RAID
controller dynamically expanded /dev/sdb to the new size, which the OS
recognized after a reboot:
SCSI device sdb: 2578636800 512-byte hdwr sectors (1320262 MB)
sdb: unknown partition table
I thought I would simply be able to expand the PV to take up the newly
available space on the "new larger disk". However, I can't seem to find
any way to expand a PV, and therein lies my problem. It seems that without
a pvexpand or pvresize command, I have no way of utilizing the additional
space.
Without that ability, it seems that I have no alternative but to remove the
additional drives (taking /dev/sdb back to its original size), create a new
RAID5 array (/dev/sdc), and create a new PV on that logical drive. Total
bummer because I lose another 147GB drive to parity for the new array, but
I don't see any other way out.
So my questions are twofold:
1) Am I missing something, or is there currently no way to expand a PV?,
and
2) Would I have been better off creating a partition table and
pvcreate'ing on /dev/sdb1instead of pvcreate'ing the entire /dev/sdb disk
initially, given that I could now have created a new partition on the extra
space and pvreate'd a new PV alongside the old?
Thanks in advance,
Jon Etkins
IT Administration & Support
Austin Logistics, Inc
ph: (512) 651-5641
fax: (512) 329-5625
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