Teemu Ikonen wrote: > I'm trying to migrate a RAID 1+0 array on a Promise S150 TX4 card with > 2.4.x kernel and the ft3xx.o module to a 2.6 kernel based system. > > Unfortunately, it seems that dmraid supports only either RAID 1 or > RAID 0, but not the combination (RAID 10) on this card. Based on a quick glance of the code in dmraid/lib/format/ataraid/hpt.h, I'd say that currently it probably only supports PDC RAID 0, 1 and SPAN. > The ft3xx module gives the following information on the array: [ snip 4x Maxtor 6Y200 / 203928MB disks ] > Dmraid tells the following: > > # dmraid -tay > pdc_cebbhcjedc: 0 792968704 mirror core 2 512 nosync 4 /dev/sdc 0 /dev/sdd 0 > /dev/sde 0 /dev/sdf 0 Just to clarify (if you're having a hard time with the dmsetup nomenclature - I know I am!): dmraid is trying to assemble a mirror from the 4 devices above with a total size of 792968704 512-byte sectors. That's a 4-way mirror that has a capacity of 94.5 MB. Knowing that disk manufacturers are cheating bastards when it comes to size figures, that's almost exactly half of one of your 200 "MB" Maxtor disks. > ERROR: dos: reading /dev/mapper/pdc_cebbhcjedc[No such file or directory] > > Contratry to above the device file /dev/mapper/pdc_cebbhcjedc exists, > but mounting it fails. That is probably a bug somewhere in dmraid/lib/format/partition/dos.c. > Is there anything I could do to help get the RAID 10 support on TX4 to > work with dmraid? I'm not the one to tell if there is, but I can definitely recommend digging into the code. It's extremely well-written, with great commenting dispersed at exactly the right intervals. I'd start with dmraid/doc/dmraid_design.txt, which is about 5-6 pages. Scroll down to "Code directory tree" if you want to dig right in. For starters, you should probably get dmraid to recognize your array correctly by fiddling with dmraid/lib/format/ataraid/pdc.*. _______________________________________________ Ataraid-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ataraid-list
