DPT based Shogun hangs with SCSI tape
A problem has been seen, where a Shogun installed with OpenServer 5
hangs intermittently during tape operations. This only appears to happen where the tape
unit is attached to the DPT SCSI controller. In extreme cases, the DPT array information
can be compromised, with the result that configured arrays need to be re-optimised.
In each case, it appears that the hang is confined to the actual SCSI
bus. A solution to this problem is to connect the tape drive on to one of the onboard
Adaptec channels using a separate ribbon cable and connector. The part numbers for these
are as follows.
| Long ribbon cable |
Pt. No.15552431 |
(1 required) |
| Wide SCSI to 8-bit SCSI adapter |
Pt. No.15552530 |
(1 required) |
Normal SCSI termination rules should be borne in mind when altering bus
configurations in this way. If all the devices in the Peripheral Drive Bay are to be
connected to the onboard Adaptec channel using this method, then the primary hard disk bay
in the Shogun (Bay B) must have its termination jumper (J2) set to terminate the existing
wide SCSI bus correctly. See the Owners handbook for details on how to do this.
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