SCSI - help

hi
I've problem with my sof- raid.
On machine I've two scsi adpters (drivers: aic7xx on motherboard and atp870u 
pci slot)
On aic7xx I've soft raid5 (and it's o.k.) but when I try to make soft raid5 on  
atp870u (with 9 disk) this process crash, tranfser goes down and in my log file 
I've:

Mar  5 08:20:19  kernel: scsi : aborting command due to timeout : pid 46081, 
scsi1, channel 0, id 11, lun 0 Read (10) 00 00 15 89 67 00 00 f8 00 
Mar  5 08:20:19  kernel:  r3b=20 
Mar  5 08:20:19  kernel: 
Mar  5 08:20:19  kernel:  que cdb=  28   0   0  15  88  6f   0   0  f8   0  
last_lenu= 1f000 
Mar  5 08:20:19  kernel:  que cdb=  28   0   0  15  89  67   0   0  f8   0  
last_lenu= 1f000 
Mar  5 08:20:19  kernel:  que cdb=  28   0   0  15  8c  4f   0   0  f8   0  
last_lenu= 1f000 scsi : aborting command due to timeout : pid 46082, scsi1, 
channel 0, id 10, lun 0 Read (10) 00 00 15 88 6f 00 
00 f8 00 
Where is proble?
What I've to do?
Thanks for help
seweryn

sewer
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