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jsosic
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Joined: 02 Aug 2004
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Location: Split (Croatia)
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 Posted: Wed Feb 03, 2010 11:20 am Post subject: LVM and partitions in logical volume? |
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Hi.
I use xen for virtualization, and I give phy's (LVM logical volumes) to Xen domU's. That means that each of my Logical Volumes has some partitions on it. I wonder, is it possible to see partitions on LVM logical volume, on the dom0 side. And if, how?
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fangorn
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Joined: 31 Jul 2004
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| Posted: Wed Feb 03, 2010 11:36 am Post subject: |
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Have you tried using fdisk/parted on the devices in /dev/mapper/<volumegroup>-<logicalvolume> ?
Have not tried it myself, but this shoud be block devices.
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jsosic
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| Posted: Wed Feb 03, 2010 12:08 pm Post subject: |
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| Code: | [root@hotstandby ~]# fdisk -l /dev/mapper/VGHotStandby-alfresco_os
Disk /dev/mapper/VGHotStandby-alfresco_os: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/mapper/VGHotStandby-alfresco_os1 * 1 13 104391 83 Linux
/dev/mapper/VGHotStandby-alfresco_os2 14 144 1052257+ 82 Linux swap / Solaris
/dev/mapper/VGHotStandby-alfresco_os3 145 1044 7229250 83 Linux
[root@hotstandby ~]# fdisk -l /dev/mapper/VGHotStandby-alfresco_data
Disk /dev/mapper/VGHotStandby-alfresco_data: 536.8 GB, 536870912000 bytes
255 heads, 63 sectors/track, 65270 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk /dev/mapper/VGHotStandby-alfresco_data doesn't contain a valid partition table |
But, I don't see them as a partitions, so I cannot mount for example /dev/mapper/VGHotStandby-alfresco_os3. Offcourse, I can mount /dev/mapper/VGHotStandby-alfresco_data, because FS is applied directly on a raw volume, without partitions.
| Code: | [root@hotstandby ~]# ls /dev/mapper/
control
VGHotStandby-alfresco_os
VGHotStandby-alfresco_data |
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jsosic
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Joined: 02 Aug 2004
Posts: 510
Location: Split (Croatia)
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| Posted: Thu Feb 04, 2010 12:58 am Post subject: |
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OK I've found solution... so here it is:
| Code: | [root@hotstandby ~]# ls /dev/mapper/VGHotStandby-alfresco_os*
/dev/mapper/VGHotStandby-alfresco_os
[root@hotstandby ~]# /sbin/kpartx -a /dev/mapper/VGHotStandby-alfresco_os
[root@hotstandby ~]# ls /dev/mapper/VGHotStandby-alfresco_os*
/dev/mapper/VGHotStandby-alfresco_os /dev/mapper/VGHotStandby-alfresco_os2
/dev/mapper/VGHotStandby-alfresco_os1 /dev/mapper/VGHotStandby-alfresco_os3 |
enjoy!
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