Increase capacity in a RAID1 setup, PE 1950/Perc 6i 72GB SAS disks, RHEL5

[Paul M. Dyer]

and the last step is to extend the filesystem size:

resize2fs /dev/sdbbbbb (rhel5)
ext2online /dev/sdbbbb (rhel4)

Paul


----- Original Message -----
From: "Brett Delle Grazie" <Brett.Dellegrazie at intact-is.com>
To: "Erling Ringen Elvsrud" <erlingre at gmail.com>
Cc: linux-poweredge at dell.com
Sent: Tuesday, November 18, 2008 10:36:21 AM (GMT-0600) America/Chicago
Subject: RE: Increase capacity in a RAID1 setup, PE 1950/Perc 6i 72GB SAS disks, RHEL5

Hi Erling, 

That should work fine but you'll need to do some extra work to make LVM
realise its
physical volume (PV) is bigger and hence the volume group (VG) has more
space available.

1. Make sure all LV's are unmounted. (required)
2. Make sure the VG's are marked offline. (maybe not necessary but for
safety) - vgchange -a n <VGNAME>
3. Resize the partition involved using parted (if using whole disk as
PV, skip this).
4. Tell LVM the PV has changed size - pvresize <DEVICE> 
5. Reactivate the VGs and LVs and remount file systems.
6. You should be in business.

Best regards,

Brett

-----Original Message-----
From: Erling Ringen Elvsrud [mailto:erlingre at gmail.com] 
Sent: Tuesday, November 18, 2008 7:30 AM
To: linux-poweredge at dell.com
Subject: Increase capacity in a RAID1 setup, PE 1950/Perc 6i 72GB SAS
disks,RHEL5

Hello,

All disk space is currently allocated to logical volumes and I need to
increase the size of one LV. It is a possibility to reduce the size of
one or several of the other LV's, but It will still be hard to get as
much free space as desired, and will require downtime.

I know it could be possible to change the disks to bigger ones in the
RAID1 set one at a time, like this:

1. Change disk 1 to 146 GB
2. wait for the PERC to copy data from disk 2 to disk 1 3. Change disk 2
to 146 GB 4. wait for the PERC to copy data from disk 1 to disk 2.

But, will the additional capacity in the RAID1 set be available to RHEL
immediately or is a reboot or other configuration required?

What kind of risks do you think this operation causes?

Thanks,

Erling



______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email 
______________________________________________________________________

_______________________________________________
Linux-PowerEdge mailing list
Linux-PowerEdge at dell.com
http://lists.us.dell.com/mailman/listinfo/linux-poweredge
Please read the FAQ at http://lists.us.dell.com/faq