The device mounts just fine at boot time, but isn't picked up by dm raid.
SUSE 9.1 / but with 2.6.8.1 kernel.
When doing a dmraid -s, I get the following:
brewster:/usr/src/linux/Documentation/filesystems # dmraid -v -ay
INFO: locking /var/lock/dmraid/.lock
INFO: /dev/hdc: hpt37x discovering
INFO: /dev/hdc: hpt45x discovering
INFO: /dev/hdc: isw discovering
INFO: /dev/hdc: lsi discovering
INFO: /dev/hdc: pdc discovering
INFO: /dev/hdc: sil discovering
INFO: /dev/sda: hpt37x discovering
INFO: /dev/sda: hpt45x discovering
INFO: /dev/sda: isw discovering
ERROR: isw: Error finding disk table slot for /dev/sda
INFO: isw metadata discovered on /dev/sda
INFO: /dev/sda: lsi discovering
INFO: /dev/sda: pdc discovering
INFO: /dev/sda: sil discovering
INFO: /dev/sdb: hpt37x discovering
INFO: /dev/sdb: hpt45x discovering
INFO: /dev/sdb: isw discovering
ERROR: isw: Error finding disk table slot for /dev/sdb
INFO: isw metadata discovered on /dev/sdb
INFO: /dev/sdb: lsi discovering
INFO: /dev/sdb: pdc discovering
INFO: /dev/sdb: sil discovering
INFO: added /dev/sda to RAID set "isw_eahbbggeai"
INFO: added /dev/sdb to RAID set "isw_eahbbggeai"
ERROR: RAID set "isw_eahbbggeai" is inconsistent
ERROR: check of "isw_eahbbggeai" failed, removing RAID set
No Software RAID sets
