I am currently using 3wares products to create 2T raids. To increase performance on my NAS type boxes I am using software raids. My problem relates to a falure of a IDE drive. Once a drive fails the next boot of the machine remaps all scsi ids. so /dev/sda-adi becomes /dev/sda-sdh. In short, if /dev/sdb dies, all raids become bad as all scsi ids shift down making my raidtab file now point at the wrong drives. (I assume this will also be a possible problem when I use my USB dongle to update software.)
Is there a way to hard assign logical /dev/sd(x) in the driver so they will always map the same ide port on the 3ware controllers? 3ware is no help on this. They say it is the bios/system and they have no control over this.
You'd better use mdadm instead of the raidtools.
The config file for mdadm looks like this: # cat /etc/mdadm.conf DEVICE /dev/hd* /dev/sd* ARRAY /dev/md0 level=raid1 num-devices=2 UUID=52094036:b2e9cf8b:4267c923:750757da
So you do not have to worry about which drive gets assigned which scsi id.
A /sbin/mdadm --assemble --scan will do the trick.
Get it at http://www.cse.unsw.edu.au/~neilb/source/mdadm/
-- MfG / Regards Friedrich Lobenstock ____________________________________________________________________ Friedrich Lobenstock Linux Services Lobenstock URL: http://www.lsl.at/ Email: fl@fl.priv.at ____________________________________________________________________
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