Tyler wrote:

PS - I've tryed the latest 2.6.12-rc3-mm2 kernel, with mdadm v2.0-devel, 
using the --metadata 1.0 option on the create line, and still get:

# mdadm -C -e 1.0 -l 6 -n 31 /dev/md0 /dev/hdb /dev/hdc /dev/hdd 
/dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf /dev/sdg /dev/sdh 
/dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm /dev/sdn /dev/sdo /dev/sdp 
/dev/sdq /dev/sdr /dev/sds /dev/sdt /dev/sdu /dev/sdv /dev/sdw /dev/sdx 
/dev/sdy /dev/sdz /dev/sdaa /dev/sdab
mdadm: invalid number of raid devices: 31

As far as I can tell, mdadm just shouldn't give this error when you're 
using a version 1 superblock. If you disable that check in mdadm.c, I 
think everything will work. Version 1 superblocks allow something like 
2000 disks in an array.

--
Paul