Not sure this is actually it (I'm just guessing here), but are you starting the raid partition on cylinder 0? Or cyl 1? I *think* (though I'm not sure) that starting on cylinder 0 actually puts the disklabel into the beginning of the partition itself. This isn't a problem for UFS, as UFS leaves 8k unused at the beginning of the FS, but it might be a problem for md.
Again, that's just a shot in the dark, take it for what it's worth. -- Sam On Mon, 18 Jul 2005, David Johnson wrote: > Hi all, > > I've been having problems with software RAID (using mdadm) on Sarge on an > Ultra Enterprise 450. There seems to be a bug somewhere causing corruption of > Sun disk labels. > > I start with 8 SCSI disks with valid Sun disk labels and one partition filling > each disk. The partition types are set to "Linux RAID autodetect". > > I can create a RAID 5 array without problems. This is the command I'm using: > mdadm -C -l5 -n7 > -x1 /dev/md0 /dev/sdd1 /dev/sde1 /dev/sdf1 /dev/sdg1 /dev/sdh1 /dev/sdi1 > /dev/sdj1 /dev/sdk1 > > If I now reboot, everything is OK and the array is detected and configured. > > The problem occurs when I format the array. E.g.: > mkfs.ext2 /dev/md0 > > This works OK and no errors are given. However when the system is rebooted, > around half the disks now have corrupt disk labels. If I re-create the disk > labels and restore the partition tables, everything is fine when I reboot. > The array is started correctly and the disk labels are maintained on > subsequent reboots. Only formatting the array causes the problem. > > I have tried with other filing systems and the same happens. Not all the disks > are affected, only around half of them (the last time I did it, sd[efghi] > were affected). > > I'd be interested to know if anyone else seen this issue. > > Regards, > David. > > -- > David Johnson > www.david-web.co.uk - My Personal Website > www.ethereye.org.uk - EtherEye Network Host Checker > www.penguincomputing.co.uk - Need a Web Developer? > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
