Increasing the size of an array on a PowerEdge 1850

[Nick_Parrott at Dell.com]

Hi Jeff,

Not aware of this being possible on PERC 5's, useful to know! Cannot
guarantee the outcome on PERC 4's however, only way is to test it..

Thanks for your input on this one.. good trick to know. If anyone is
aware of whether this can be done on the PERC 4's or before, please let
us know!

*Important thing to remember - DO NOT initialise the array once created,
as this WILL wipe the data in there, so make sure the option is not set,
and if it does start automatically, stop it ASAP*

Regards,

Nick

-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] On Behalf Of J Potter
Sent: 29 July 2008 17:03
To: linux-poweredge-Lists
Subject: Re: Increasing the size of an array on a PowerEdge 1850


> I've got a requirement to increase the size of the volume on an 1850  
> running two 73GB disks in a raid-1 mirror.
> Is is possible to rebuild onto larger disks (pull one disk out,  
> rebuild, swap the other, rebuild) and then see more space on the  
> array?
> Any other options?

I did the following on a batch of PE 1950s running CentOS  
successfully. I wouldn't try it unless you're prepared to do a full  
restore anyway.

Yank 1 drive, pop the new (larger) one in, wait for the mirror to  
rebuild, then pop the 2nd one in, and wait for it to rebuild.

Then, reboot, hit ctrl-r at right point for raid controller. Delete  
virtual disk 0; re-add virtual disk 0 (as raid-1, as it was before),  
and reboot.

Boot off of CentOS installer CD -- when prompted, enter 'linux  
rescue'. Once at a prompt, run:

parted /dev/sda
p
resize 4 2344MB 300GB
mkpart logical ext3 35.8GB 299GB
quit

mkfs.ext3 /dev/sda7

Reboot. CentOS should come back up. In /etc/fstab, add the new /dev/ 
sda7 entry and map it to whatever appropriate mount point (i.e., / 
home). Then, 'mount /home' or whatever the path you want is.


-Jeff


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