wyatt@cfa.UUCP (Bill Wyatt) (04/06/88)
> Question: How do you add a second TMSCP device?
[Ultrix 2.0 sys]
Well, I solved my own problem, through looking at sources, mainly.
The relevant lines in the correct config file seem to be:
adapter klesiu0 at uba0
controller tmscp0 at klesiu0 csr 0174500 vector tmscpintr
tape tms0 at tmscp0 drive 0
adapter klesiu1 at uba0
controller tmscp4 at klesiu1 csr 0160404 vector tmscpintr
tape tms4 at tmscp4 drive 0
I still don't really understand what the `klesiu?' adapter does, but the
above worked to add the second interface, a TMSCP-emulating controller for
our SCSI Exabyte digital video tape drive. In addition, you make the
`tms4' device (makes minor device nos. 32 and up) and access it.
I'm just starting to see what the performance in an Ultrix environment
is. So far, the raw numbers appear to agree with the Digital Review
article of a few weeks back (very slow positioning, good transfer
rate and total capacity), although tar and dump do not reposition
a tape as much as VMS BACKUP does, so they're better than with VMS.
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