Messages in this thread | | | Date | Tue, 7 Feb 2006 17:45:12 -0500 | From | Wakko Warner <> | Subject | Re: non-fakeraid controllers |
| |
Phillip Susi wrote: > Wakko Warner wrote: > >I've been wondering about dmraid. I considered buying an adaptec sata raid > >(hardware). One of the drawbacks on hardware raid is the format isn't > >compatible with any other card (or rather manufacturer). So the question > >is, has anyone written anything that can detect and activate disks from a > >hardware raid controller when they are placed on a controller w/o any raid? > > > >basically what I mean is, 3 disks, raid5 was in a system with hardware > >raid. the raid card blows up and cannot get another one so to get the data > >back, > >place disks in another machine or on a standard controller and use software > >raid or whatever to recover the data. > > Yes, that is one of the problems with hardware raid controllers. If you > can figure out the controller's metadata format, possibly by asking > adaptec, or reverse engineering, then patching dmraid to understand that > format ( it already understands several used by fakeraid controllers ) > should be rather easy.
One of the things that I noticed with adaptec's and ami's raid (and an old mylex dac960 IIRC) is that you can create containers or partitions (which every they call them) on a disk set. I guess you can take 3 disks, create a raid5 using half the capcity of the 3 disks and a raid0 on the rest. I'm not sure about fakeraid controllers as I've never configured one.
-- Lab tests show that use of micro$oft causes cancer in lab animals Got Gas??? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |