I have a Dual-P3-450 Box running RedHat 6.0 and kernel version 2.2.9.
The drives I have are a 2.1 Gb UDMA (only used as a Boot / System Drive)
4 IBM 9.1 GB U2W SCSI Drives w/ 2Mb Cache
I have successfully created all of the partitions across all of the 4
drives, and have properly made the /etc/raidtab file
A sample of this, for my /dev/md0 device is....
parity algorithm left-symmetric
This format worked perfectly under kernel version 2.2.5, athough I found the
raid to be a little flaky.
Under the 2.2.9 kernel ver like I mentioned above, when I do a
"mkraid --really-force /dev/md0", it appears to view the drives correctly,
but the returns "mkraid aborted" for no apparent reason.
I have heard that the raid-tools are kernel-raid-patch specific, and that
some of the ioctl numbers have changed throughout the history.. But so far I
have been unable to track down any version that will work with my setup...
If anyone has any information which could help it would be immensely
appreciated, as I am currently pulling my hair out struggling to comprehend
why nothing is being reported to the syslog and mkraid isn't returning and
useable troubleshooting info...