< Connecting Fujitsu M2266SA to SGI SCSI (SOLVED) >

[Robert Rothe]

rot at unlisys.in-berlin.de (Robert Rothe) writes:
>i have bad problems connecting a M2266SA (1.05GB) SCSI Disk 
>to a Silicon Graphics Personal Iris 4D (Irix 3.3.1).
>when booting the machine says:

>sc0: Unexpected transfer phase. State= 4f Phase = 20
>scsi (0,ID,0) transfer aborted (Hardware error)

well, to get the disk running it was necessary to 
1. Disable the Synchronous TransferMode (CHN2, JP 8 (Pin15-16) open)
2. Open CHN2, JP 1 (Pin 1-2) (Inquiry Data).

after these changes the system boots the first time without complaining..

but with _heaviest_ IO (cpio -p (reading from the fujitsu-drive) sometimes
another error occurred:
	dks0d#s10: Unrecoverable device error: Internal controller error.

To get rid of the message above it was necessary 
3. To disable the Read-Ahead Cache ! (CHN3/9 JP 3 (Pin 5-6) open).

the drive runs fine so far..
but i wonder why i have to slow down the device soo much to get it running
with the sgi-machine ? is it the fault of the disk, the scsi-driver or the 
scsi-adapter ?

many thanx to merritt at climate.gsfc.nasa.gov (John H. Merritt)
	robert.

-- 
Unlisys,  Hohenzollerndamm 7, 1000 Berlin 31     ---     Robert Rothe
unido!fub!unlisys!rot,   rot at unlisys.in-berlin.de,    030 / 88 22 980