hrm, good feedback.
I think most of the advice will assume you'll be using the master at the same time as the slave - usually in the same RAID.
I suppose the master/slave reliability issue is valid enough though, and is a good enough argument against it on it's own :(
I am wondering if the idea of grouping the master and slave devices in different arrays will make any difference. I'll give it a try since the alternative (two 4 channel s/w RAID boards) yet is more money ;)
thanks.
Max.
Paul Barker wrote:
Hi
AFAIK its a bad idea to put slave IDE devices into a software RAID set. Firstly it will upset performance and secondly there's a good chance that if you lost one of the disks on that channel then it would take out the other also. (ie loose the Primary master and the Primary slave goes too. So even if the Primary slave wasn't physically bad you'd still end up doing recovery on both arrays)
I have 2 X 2 channel PATA cards and tried putting slave devices on and I had problems even getting the OS to see the drives properly to create the RAID set. Got timeouts etc trying to bring a RAID5 set online. I now have 4 disks on these 2 controllers in RAID5 all on the masters and a RAID1 set for my OS on the motherboard IDE masters.
I guess there's no harm in trying, YMMV but I think even the RAID howto it advises against it.
Cheers
Paul
Paul Barker
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