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Adaptec 5805 raid 5 expand

T

Terr1

n00b
Joined
May 24, 2010
Messages
28
I bought an Adaptec 5805 a year ago or so..
Currently got 6x2TB WD RE4 in a RAID 5 configuration using ext4 on linux..

A few months after I got the array, I had power fluxuations (at least thats my theory, now I got server correctly grounded) and 1 drive popped out of the array.. I had to Force it online again to get it working (I am a newbie with zero knowlegde).. I got a bad stripe warning on my array, but it is listed as optimal and is working without any problems.

Question 1:
Is there any way to get rid of the Bad Stripe warning without reforming the raid array (ie deleting all data). Im currently doing a "verify and fix" no idea if it can do the trick thou.

Question 2:
I bought 2 new 2TB WD RE4 drives and want to expand my RAID 5 array. Should I just do "Verify with fix" and afterwards Initialize my 2 new disks thats in "Ready State" and then just add them one by one to my RAID 5 array?

When I add a new disk, will my ext4 filesystem remain intact (usable)? I will just have to expand the ext4 filesystem after I added my two new disks to gain the extra space?
 
When I add a new disk, will my ext4 filesystem remain intact (usable)?
Click to expand...

Yes.

I will just have to expand the ext4 filesystem after I added my two new disks to gain the extra space?
Click to expand...
You probably need to expand the partition. I usually use lvm on top of mdadm.
 
drescherjm said:
Yes.
You probably need to expand the partition. I usually use lvm on top of mdadm.
Click to expand...

I use Adaptec Hardware raid, mdadm is for software raid only right?

I didnt choose to use lvm when I build my current ext4 filesystem (My old setup was lvm logical volume created by joining 8-9 random sized old harddrives).

I guess ill start by expanding the array and then figure out how to expand the partition afterwards :) (EDIT: I guess I just should use resize2fs ..)

But thank you for the answers!
 
Last edited:
I guess ill start by expanding the array and then figure out how to expand the partition afterwards
Click to expand...

In the past before I have used lvm I have deleted the partition table and recreated it with the same start position. That sure was scary but worked. Make sure you backup the partition table with sfdisk before attempting that..

Another option was to add an additional partition. And finally gparted (and similar utilities) is also an option.
 
I cannot choose the Expand option on Adaptec Storage Manager, can somebody help? Its grayed out?

Is it because of the bad striping warning?
 
If anyone else gets this problem, it is because of the bad striping.. It requires recreation of the array before any expansion can be done :(
 
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