Fw: contents of latest HP load

From: Jay West <jwest_at_classiccmp.org>
Date: Sun Jun 8 10:33:01 2003

> >I picked up
> > several of the 7970E tape drives. They all say 45 IPS inside and all but
> > one are marked "option 052/151", the other one is marked "option 183".
It
> > was one of a pair that was mounted in one cabinent and run off of a
single
> > set of controller cards with some jumper cables connecting the two
drives.
>
> option 151 specifies 45ips, master PE read circuits, 9 track, PE write
> circuits (1600bpi)
>
> From what I've seen, -151 is the most common to find 'in the wild' these
> days
>
> I would suspect that 052 is an elective option, not a standard
configuration
> option. I can't find any docs on option 052.
>
> Option 183 I also can't find any docs on, but I would guess it is
something
> related to being a slave drive.
>
> HP 7970 tape drives could be read/write, read only, dual format, or
multiple
> format. They could also be slave only units (where you have to have a
master
> to use it) or master.
>
> I personally think the nicest setup for a single tape drive is
> the -157/161/165 which are 3 varying speeds of a master that can deal with
7
> or 9 track, PE or NRZI. However, these can't write PE mode, only NRZI.
Lets
> you read the most types of media though. Then the best setup for two
drives
> is either two 151's on two separate controllers, or a 151 and 150
> master/slave setup.
>
> I find the manual on these options especially confusing.
>
> Jay West
Received on Sun Jun 08 2003 - 10:33:01 BST