Preserving RAID 0 array when changing RAID controllers

Posted on 2003-03-06
Medium Priority
Last Modified: 2010-04-03
I believe this is a very simple yes/no question, but I cannot find an answer in the documentation, and my google skills are failing me right now. I'm not a RAID expert at all :\

If I upgrade my Giga-Byte motherboard with an onboard (I know, I never said it was an elite setup) Promise FastTrack Lite IDE RAID controller to another Giga-Byte mobo with the same controller, will my RAID 0 drives remain intact? Will the controller automatically see the existing striped drives?

Thanks in advance
Question by:Win2K4Life
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Expert Comment

ID: 8085423
It's a new one on me too - I have had success in moving a RAID0 stripe from a Promise PCI RAID controller to another controller - so in at least that case, the Array configuration info was on the drives, not the card...

As always, I'd recommend backing up the data first (if that's an option) and then trying it - but I'd give the onboard about an 80% chance of being the same as the PCI one.

Cheers - Neil G

Accepted Solution

heskyttberg earned 150 total points
ID: 8086667

In general terms today RAID  controllers should store the raid config on each HD that is part of the RAID setup. This is gor any RAID controller IDE or SCSI.

This is however not always true.

But as talkiet said just try, but I'd also STRONGLY recommeding to backup any data you don't want to loose, games and programs are easy enogh to reinstall, but you might want to backup saved games and documents and such things.

/Hans - Erik Skyttberg

Author Comment

ID: 8088710
I made drive images of my system disk and my dev disk, I just don't want to resort to using them if I don't have to :) BTW, talkiet, they're both onboard, but I'm glad you brought that up because eventually I may need to upgrade to a 4 channel PCI RAID card. For now that's not my primary focus, though.
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Expert Comment

ID: 8099276
I built my main PC about 18 months ago based on an Abit KG7-RAID motherboard.  Using the on-board HighPoint RAID controller I set up a RAID 0+1 array with four Maxtor 40Gb drives giving a logical 80Gb C: drive. I also added a 20Gb drive on which I back up documents, downloads, email files etc. (belt and braces).

The mobo failed after about 14 months and I rebuilt with an Abit KX7-333RAID which also has an on-board HighPoint controller but one that can operate at 133 as opposed to 100.  For whatever reason, hardware or software, the new controller would not read my four disk array.  I thank the powers that be that I had the backups on the 20Gb disk and was able to start from scratch with the RAID array, rebuild the system and then restore my data files.

RAID 0+1 protects me from a failure of one disk but I still neeed to protect myself against the type of failure I experienced.  I would not now trust any RAID controller (SCSI or IDE) to read/write to a 0+1 array which had been set up by a different controller unless it had been tested and proven to work.

Author Comment

ID: 8105637

Well... It worked, sort of...

The RAID stripe is still intact, but there are now new issues that require me to resort to asking a question in the win2k forum *sigh*. Funny, just when you think you have a hardware issue on your hands, and solve it, a new software issue crops up to bite you on the behind. Thanks all, for your help.

I have no idea as to who's answer I should accept, since both talkiet's and heskyttberg's were helpful and accurate (sorry Lengore, I read yours ex post facto since my comp's been down for the last couple of days)

Author Comment

ID: 8120364

K, the points will be awarded to heskyttberg , simply because he answered my question with more technical information. Thanks to both of you (heskyttberg and talkiet)!

BTW Lengore, that's why I buy Giga-byte or Asus boards instead of Abit :P I hope this restores your faith in RAID flexibility a little bit as well :)

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