On 12/10/2009 09:18 PM, Bob Goodwin wrote:
Yes, I posted the question and found the response interesting and
helpful. I spent a couple of hours reading man pages and
experimenting with the lvm commands on various drives.
But I have not been able to open a volume and list the directories
and files, such as /home and /etc! I must be dense ...
This from another drive:
[root@box6 bob]# lvm
lvm> pvdisplay
--- Physical volume ---
PV Name /dev/sdb2
VG Name VolGroup00
PV Size 74.43 GB / not usable 22.62 MB
Allocatable yes
PE Size (KByte) 32768
Total PE 2381
Free PE 1
Allocated PE 2380
PV UUID J5Yc28-aO4n-ODWI-1c0W-H9Jr-04jN-ufwyRj
And fdisk shows:
Disk /dev/sdc: 20.0 GB, 20020396032 bytes
255 heads, 63 sectors/track, 2434 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000c6487
Device Boot Start End Blocks Id System
/dev/sdc1 * 1 2434 19551073+ 8e Linux LVM
But I can't mount this one either using " mount /dev/sdc1 -t
ext3 /mnt/hdtest "
It protests about the file type[?]. Perhaps lvm requires a
different type?
You cannot directly mount an LVM2 physical volume. The idea of the
volume manager is that it abstracts storage using a layered model:
Physical volumes - actual disks/storage devices
Volume groups - collections of related disks that are managed together
Logical volumes - virtual "partitions" carved out of the disks in the VG
The PV is a container for the LVs that exist in the volume group.
You need to activate any LVs that it contains using the commands in my
earlier mail before you can mount them.
LVs then behave a lot like regular partitions but with more flexibility;
they can be resized on the fly, mirrored, snapshotted, migrated to new
storage etc all without interruption to services.
When you activate an LV or a VG you will get new entries in the /dev
directory in a subdirectory named after the volume group. E.g. my VG in
the examples I gave was named "system" and it contains a half-dozen or
so LVs:
# ls /dev/system/
home root swap0 tmp usr var
[root@p380-1 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
system 1 11 0 wz--n- 231.66G 88.81G
[root@p380-1 ~]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
home system -wi-ao 100.00G
root system -wi-ao 21.03G
swap0 system -wi-ao 8.00G
tmp system -wi-a- 1.00G
usr system -wi-a- 8.00G
var system -wi-ao 4.00G
E.g. to mount the tmp logical volume (assuming it's active and not
already mounted), I would run:
mount /dev/system/tmp /tmp
Regards,
Bryn.
--
fedora-list mailing list
fedora-list@xxxxxxxxxx
To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
