Extending Virtual Disk and LVM online.

Ray Van Dolson rvandolson at esri.com
Thu Jun 26 10:27:39 CDT 2008

On Thu, Jun 26, 2008 at 06:32:27AM -0700, Ray Van Dolson wrote:
> Hi all, got a PE2850 with a PERC 4e/Di.  We had three 147GB disks in
> the system configured in a single RAID5 virtual disk (/dev/sda to the
> OS).  I added three more of these disks and wanted to extend the
> existing Virtual Disk.


FYI all, ended up having to reboot to get fdisk to see the new space.
Oh well.

Anyways, due to how things are partitioned on this system (wasn't set
up by me! :), it doesn't look like I'm out of the woods yet:

Command (m for help): p

Disk /dev/sda: 733.4 GB, 733478912000 bytes
255 heads, 63 sectors/track, 89173 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14       12761   102398310   8e  Linux LVM
/dev/sda3           12762       25509   102398310   8e  Linux LVM
/dev/sda4           25510       35669    81610200    5  Extended
/dev/sda5           25510       27421    15358108+  83  Linux
/dev/sda6           27422       27943     4192933+  82  Linux swap
/dev/sda7           27944       35669    62059063+  83  Linux

Command (m for help): n 
No free sectors available

Awesome.  No more primary partitions left and the extended partition is
too small.  So I either need to grow the extended partition or one of
the LVM primary partitions.

And why there are two identically sized LVM primary partitions (on the
same virtual disk mind you) is beyond me!

What a PITA. :)


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