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RAID 5 Capacity Expansion

thomas2010
Occasional Visitor

RAID 5 Capacity Expansion

hello,

i need to increase the capacity of our fileserver, raid5 with bigger harddrives.
the systempartition is an raid 1 with 150gb drives.

is there a possibility to "change" the drives online?

the datapartition is now configured as raid 5 with 3x150gb sas driver, i want to change them to 3x300gb drives.

is it possible to do this with hp array config. utility?

many thanks!
thomas
5 REPLIES
Víctor Cespón
Honored Contributor

Re: RAID 5 Capacity Expansion

You can replace each disk, one by one, waiting for the RAID reconstruction to finish before replacing the next disk.

You'll end with a RAID that has 600 GB usable, 300 used by the existing LUN. Then you have to expand the LUN to use the 600 GB.

And finally, expand the filesystem using operating system tools.
thomas2010
Occasional Visitor

Re: RAID 5 Capacity Expansion

superb,
excelent news!

i will use server 2008 tools to expand the capacity.

many thanks!
thomas
Jan Soska
Honored Contributor

Re: RAID 5 Capacity Expansion

Hello,
just have on mind you need raid controller with baterry backuped cache to online expand hw raids....

Jan
thomas2010
Occasional Visitor

Re: RAID 5 Capacity Expansion

hello jan,

i'm not sure, having battery backed up controller...i will find out.

in the case i havn't, how is it possible to expand? backup and restore? or ist there an other solution?

many thanks
thomas

Jan Soska
Honored Contributor

Re: RAID 5 Capacity Expansion

Hello,
I you not have battery cache, you can use solution provided by vcespon, but at the end not expand the array, but create a new logical volume. This allows you have another 300GB disk under windows.
You can live with if if you do not need whole 600GB in one windows disk.

Jan