probelmas con RAID-5

[blackbeer]

Tengo tres discos ultra scsi 72.8 Gb 10K con software RAID - 5. Red hat 8.
Uno de ellos aparentemente dejo de funcionar. Obtengo el siguiente mensaje:

md: Autodetecting RAID arrays.
 [events: 00000f48]
 [events: 00000f48]
 [events: 00000f42]
md: autorun ...
md: considering sdc1 ...
md:  adding sdc1 ...
md:  adding sdb1 ...
md:  adding sda3 ...
md: created md0
md: bind<sda3,1>
md: bind<sdb1,2>
md: bind<sdc1,3>
md: running: <sdc1><sdb1><sda3>
md: sdc1's event counter: 00000f42
md: sdb1's event counter: 00000f48
md: sda3's event counter: 00000f48
md: superblock update time inconsistency -- using the most recent one
md: freshest: sdb1
md: kicking non-fresh sdc1 from array!
md: unbind<sdc1,2>
md: export_rdev(sdc1)
md0: max total readahead window set to 512k
md0: 2 data-disks, max readahead per data-disk: 256k
raid5: device sdb1 operational as raid disk 1
raid5: device sda3 operational as raid disk 0
raid5: md0, not all disks are operational -- trying to recover array
raid5: allocated 3288kB for md0
raid5: raid level 5 set md0 active with 2 out of 3 devices, algorithm 0
RAID5 conf printout:
 --- rd:3 wd:2 fd:1
 disk 0, s:0, o:1, n:0 rd:0 us:1 dev:sda3
 disk 1, s:0, o:1, n:1 rd:1 us:1 dev:sdb1
 disk 2, s:0, o:0, n:2 rd:2 us:1 dev:[dev 00:00]
RAID5 conf printout:
md: recovery thread got woken up ...
md0: no spare disk to reconstruct array! -- continuing in degraded mode
md: recovery thread finished ...


El test del mismo disco da OK con el cd del fabricante por lo tanto
asumo que es problema de software RAID.

alguna experiencia?
que deberia hacer para agregar el disco al array nuevamente?

muchas gracias.