This message concerns the Promise Ultra33 controllers, and upgrading
an existing RAID5 config to use the new controllers. Current config
for /dev/md[X]:
raid-disk 0: /dev/hdb[X+1]
raid-disk 1: /dev/hdc[X+1]
raid-disk 2: /dev/hdd[X+1]
Want to go to a config in which all three raid disks (and possible
future spares) are primary on their own IDE channel.
Ref: Zach Coombes, AMD, Austin, TX ([EMAIL PROTECTED]), Wednesday Jul 28.
> The oldest (and probably most bullet-proof in linux) I know of is the
> Promise Ultra33. Promise also just released the Ultra66 for the new class
> of ATA66 drives. Another company, Highpoint, has a card out, but I have
> no experience with it and they're hard to find, even on the net.
>
I ordered them. What I'm wondering is how the controllers will be
identified provided I do nothing special to set up the kernel (2.2.10
with 0723 raid patch). which controller will get hde/f,g/h, and which
will get hdi/j,hdk/l (if I install two ultra33's in a single
motherboard?)
Right now I have two md devices, one using hdb1,hdc1,hdd1 and the other
hdb2,hdc2,hdd2.
I am wondering how I can migrate those drives to the promise ultra33's
without losing data? If I edit /etc/raidtab to point to other devices
say (/dev/hde1 /dev/hdg1 /dev/hdi1) (same for the other md device) and
I put the devices in the right order (i.e. the same raid-disk number
as with the old config in raidtab), then all I have to do is reboot,
no?
I'm a bit afraid of the raid autodetect partition types, in this
scenario. If it tries to autodetect and autostart the raid device, it
could be hairy. Is there anyway I can disable the autodetection in the
kernel , short of recompiling the kernel? I.e. is there a kernel flag
to the raid subsystem?
Any help and advice is much appreciated, esp. from anyone out there
who has done this sort of move.
--
Kiyan Azarbar Sound Foundation Inc.
[EMAIL PROTECTED] R.A. Fencing Club
http://anduin.kublai.com/~kiyan PGPkeyID: 0x9A9EC5EA
