Actually, there are two ways that I know of to deal with this. I'm assuming that you're using Adaptec HostRAID on that 7901 controller: 1) Deactivate HostRAID. Set up a small /boot at the beginning of sda, make a md-based RAID0 out of the rest of the two drives for /, and (generally speaking) things should just work. 2) md doesn't know how to interpret HostRAID arrays correctly--what you want is a program called dmraid because it _does_ know how to interpret HostRAID arrays and set up the device-mapper driver correctly. You'll need to get the latest copy (1.0.0rc10) from Heinz Mauelshagen (http://people.redhat.com/~heinzm/sw/dmraid/), build it, and then modify your initrd to include /sbin/dmraid and call "dmraid -ay" prior to mounting the root filesystem. Neither approach requires the attach_HostRAID patch. Incidentally, the a320raid driver is a binary module from Adaptec. You're not losing much by using an open-source solution, because a320raid, md and dmraid are all software RAID drivers. --D José Miguel Morales F. wrote: > Hello Mr. Darrick. My name is José Miguel Morales, System Manager at > Mining Center, P. Catholic University of Chile. > > I'm writing to you (in hope this IS your right address) about a > thread you started on December 1st, 2005, at ussg.iu.edu > > Is about your "rejected" patch for "aic79xx_osm_pci.c" under kernel > 2.6.14. > > I have a couple of Dell Precision 670n, with nice AIC-7901 on-board + > 2 73 GiB. SCSI-3 10.000 RPM H.D.s, built as RAID-0 for QUITE A GOOD > speed... > > Well, of course I had trouble installing Linux on that configuration. > The driver ("aic79xx_osm_pci.c" of kernel 2.6.15, IDENTICAL to the > 2.6.14 one) just recognized my two disks as /dev/sda & /dev/sdb, and NO > RAID support. > > With your patch (and using "attach_HostRAID=1"), I finally made a > /dev/md/0 visible, then wrote a SIMPLE /etc/raidtab (included below) and > started it with "raid0run /dev/md/0". > > That way "fdisk /dev/md/0" was able to see the partitions, and WITH > apropriate device names for each partition, but such devices don't exist > under /dev/md/... > > Looking at /var/log/messages I found raidtools complaining about > "errors with the superblock of the array", and I was unable to perform > further actions without risking to destroy the array. (Which already has > 2 partitions with a complete WinXP installation.) > > I noticed that you talk about an "a320raid" drier module, but I can't > find any "direct" reference to it. Could it be possible to you to > enlighten me a bit more on this issue, please? > > Sorry for bugging you, but as I read the whole thread I know I'll get > no "official" help from Linux people, and I don't want to give up the > array... > > Thank you very much in advance... José Miguel Morales F. > > P.D.: Here is my "simple" /etc/raidtab: > > - + - + - + - Cut Here - + - + - + - Cut Here - + - + - + - > > raiddev /dev/md/0 > raid-level 0 > nr-raid-disks 2 > persistent-superblock 0 > chunk-size 16 > > device /dev/sda > raid-disk 0 > device /dev/sdb > raid-disk 1 > > - + - + - + - Cut Here - + - + - + - Cut Here - + - + - + - > > ... I really don't know, but the "persistent-superblock" statement > always gives me problems, no matter how do I use (or don't use) it... > Regards !!! >
Attachment:
signature.asc
Description: OpenPGP digital signature
-- dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
