[linux-lvm] How do I use free PE?
Stuart D. Gathman
stuart at bmsi.com
Fri Oct 23 15:41:37 UTC 2009
On Fri, 23 Oct 2009, Rod Rook wrote:
> I've installed Fedora 10 on a 250GB SATA hard drive.
> I want to use the unused portion (free PE= 4378, about 140GB), but I don't
> know how I go about doing it.
> I don't want to add it to VolGroup00, but I want it made accessible as a
> general storage space.
> PV Name /dev/sdb2
> VG Name VolGroup00
> PV Size 232.69 GB / not usable 4.58 MB
> Total PE 7446
> Free PE 4376
> Allocated PE 3070
It already *is* part of VolGroup00. To use it, you can:
1) increase the size of an existing filesystem, e.g. / on LogVol00.
2) allocate another LV and create a filesystem on that.
I don't use the GUI tools, but here is how you could do (2) on
the command line:
# lvcreate -L 100G -n data VolGroup00
# mke2fs -j -L/data /dev/VolGroup00/data
# mkdir /data
Edit /etc/fstab and add a line like the following:
LABEL=/data /data ext3 noexec,nodev 1 0
# mount /data
Be sure to leave a gig or two of free space on VolGroup00 so that you
can make a snapshot of LogVol00 (or data) for backup:
# lvcreate -s -L1G -n LogVol00_snap VolGroup00/LogVol00
# mkdir /mnt/LogVol00
# mount -r /dev/VolGroup00/LogVol00_snap /mnt/LogVol00
# rsync -ravHX /mnt/LogVol00/ /path/to/directory/on/large/backup/disk
# lvremove VolGroup00/LogVol00_snap
Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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