[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

RE: [lvm] Howto resize LVM on GPT partition.



I've done 1. before and it works okay. Like you say, it's just a little
scary modifying the partition table, but it works. I'd back up your data
first though.

-----Original Message-----
From: redhat-list-bounces redhat com
[mailto:redhat-list-bounces redhat com] On Behalf Of Soeren Grunewald
Sent: Wednesday, 11 May 2011 2:43 a.m.
To: General Red Hat Linux discussion list
Subject: [lvm] Howto resize LVM on GPT partition.

Hi All,

We had a RHEL5.6 server which was installed with default settings on a 
HW raid system. The raid was originally setup as raid1 with 2x2TB. Soon 
we run out of storage, so we migrate to raid5. Now we have ~4TB, but 
can't access the storage, because MBR supports only partitions up to
2TB.

So I've converted the MBR to GPT and fixed grub to boot again. That was 
quite easy (following http://www.rodsbooks.com/gdisk/mbr2gpt.html).

But now i need to resize the physical LVM partition. And this is 
something which makes me nervous.

Normally i would use fdisk to delete part2 and recreate it. Using parted

and resize command does not work because it is a LVM partition. and 
mkpart does not know LVM as partition type too.

Finally i can use pvresize, but i have no idea if pvresize is working 
correctly with GPT partitions and/or partitions size > 2TB.

In the end i have 2 options.
  1) try pvresize and pray
     - the way it should be, but scary
  2) create a new LVM partition and add it to the volume group.
     - uncool

So has anyone here done something before or any other ideas/comments?

Below some print outs which might be helpful.

parted:

Model: AMCC 9690SA-4I DISK (scsi)
Disk /dev/sda: 4000GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name                Flags
  1      32.3kB  107MB   107MB   ext3         Linux/Windows data
  2      107MB   2000GB  2000GB               Linux LVM           lvm

pvdisplay
   --- Physical volume ---
   PV Name               /dev/sda2
   VG Name               VolGroup00
   PV Size               1.82 TB / not usable 225.00 KB
   Allocatable           yes
   PE Size (KByte)       32768
   Total PE              59601
   Free PE               1
   Allocated PE          59600
   PV UUID               C0dkqJ-QObR-qx8I-EQZh-LV65-w2Df-nFJhw

lvdisplay
   --- Logical volume ---
   LV Name                /dev/VolGroup00/LogVol00
   VG Name                VolGroup00
   LV UUID                lBPFKP-OYX9-rPVU-f2RN-iO4q-Z9LP-RyFbUs
   LV Write Access        read/write
   LV Status              available
   # open                 1
   LV Size                1.81 TB
   Current LE             59351
   Segments               1
   Allocation             inherit
   Read ahead sectors     auto
   - currently set to     256
   Block device           253:0

   --- Logical volume ---
   LV Name                /dev/VolGroup00/LogVol01
   VG Name                VolGroup00
   LV UUID                1uJ9kD-l9WD-gEjQ-grAz-uppa-Un3d-HijG6w
   LV Write Access        read/write
   LV Status              available
   # open                 1
   LV Size                7.78 GB
   Current LE             249
   Segments               1
   Allocation             inherit
   Read ahead sectors     auto
   - currently set to     256
   Block device           253:1


--
Kind regards,
Soeren

-- 
redhat-list mailing list
unsubscribe mailto:redhat-list-request redhat com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/redhat-list
==========================================================
For more information on the Television New Zealand Group, visit us
online at tvnz.co.nz 
==========================================================
CAUTION:  This e-mail and any attachment(s) contain information that
is intended to be read only by the named recipient(s).  This information
is not to be used or stored by any other person and/or organisation.



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]