17 Apr
2014
17 Apr
'14
10:25 a.m.
On 4/17/14 9:32 AM, Benjamin Huntsman wrote:
Does anyone know, are those circa System/360, or
are they from the 7090 era?
Most of the containers I've seen prior to the 360 are black instead of blue.
The other way to tell is the supported density. 9 track tapes are all 360 era.
800bpi 7 track was the highest density IBM used on machines like the 1401 or 7090.
If a tape is rated at 556 bpi, for example, it probably started out on earlier
machines. 7 track drives, of course, were available as options on the 360 for data
migration.