Two quick questions, TK70 & DSSI

From: Seth J. Morabito <sethm_at_loomcom.com>
Date: Thu May 6 13:25:55 1999

On Thu, 6 May 1999, Chuck McManis wrote:

> 1) Can a TK70 drive read/write TK50 tapes? I'm looking for media for the
> TK70 to test it and all I've found so far are TK50 tapes (or are they the
> same tape?)

It can read TK50, but not write them. Inserting a TK50 cartridge into
a TK70 drive will automatically turn on the "write protect" light.

TK50 cartridges are 95MB, and TK70 are, I _believe_, around 200MB.
Don't quote me on the TK70 size, though :)

> 2) What termination requirements are there on DSSI disks? I powered up the
> two RF71's and the KQSFA DSSI controller in the BA213, they spun up and the
> ready lights were on but when UNIX probed the controller it saw only one
> drive and when I tried to read that drive its FAULT light started flashing.
> The cabinet is set up to connect the card to a ribbon cable that connects
> both drives and then ends at a funky high density connector (looks a lot
> like SCSI-2).

I'm not too sure about this. I know that on my MicroVAX 3800, the DSSI
disks each have the main cable (high density 50 pin, as you described)
running to it, and also a second smaller cable for ID select running to
the front panel, which has the ID jumpers on it. In my case, the DSSI
disks are RF71 and RF72 drives.

At the end of the chain I have a small 50-pin terminator. It looks to
me just like a 50 pin SCSI terminator, except I'm sure it's different.
I'll look up the part number for you when I get home.

> Thanks,
> --Chuck McManis

-Seth
--
"You know, if there's one thing more destructive      | Seth J. Morabito
 than a hydrogen bomb, it's a hydrogen bomb strapped  | sethm_at_loomcom.com
 to the back of a MANLY MAN!!!"  [James "Kibo" Parry] |   Perth ==> *
Received on Thu May 06 1999 - 13:25:55 BST

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