LVM: 200G + 200G = 376G ?!?
Colin Brace
cwb at lim.nl
Wed Aug 10 17:11:41 UTC 2005
Hi all,
I have two 200G HDs with which I would like to create is single LVM volume.
To begin with, I created one single primary partition on each of the
drives. Here is the fdisk output:
Disk /dev/sda: 200.0 GB, 200049647616 bytes
255 heads, 63 sectors/track, 24321 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 24321 195358401 83 Linux
Disk /dev/sdb: 203.9 GB, 203928109056 bytes
255 heads, 63 sectors/track, 24792 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 24792 199141708+ 83 Linux
Next I ran pvcreate on each. With vgcreate I then created a groups
called "zinka" consisting of /dev/sda1 /dev/sdb1
Now I wanted to create a single logical volume called "films":
lvcreate -n films -L 400G zinka
However, lvcreate complained:
Insufficient free extents (96310) in volume group zinka: 102400 required
By trial and error, I discovered that I could only make a volume 376G in
size. What is happening to those other 24Gs?
Here is the output of vgdisplay:
--- Volume group ---
VG Name zinka
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 8
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 0
Max PV 0
Cur PV 2
Act PV 2
VG Size 376.21 GB
PE Size 4.00 MB
Total PE 96310
Alloc PE / Size 96256 / 376.00 GB
Free PE / Size 54 / 216.00 MB
VG UUID TzCRA5-y8er-O14N-4b8D-fQMA-J1l0-iCYKtR
Thanks,
--
Colin Brace | cb at lim.nl
Amsterdam
http://www.lim.nl
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