M4data model 9914 tape drive

Al Kossow aek at bitsavers.org
Tue Mar 3 13:27:34 CST 2015

On 3/3/15 5:37 AM, Jay West wrote:
> GreenTree and it's worked flawlessly since.

They bought Storagetek's tape operation along with all the documentation.

I got nowhere a year ago trying to get 9914 schematics from them, which
I desperately need to try to figure out the modifications that John Bordynuik
made to the motor control board when he modified a drive to support a MR head

The thickness isn't particularly critical. It may be more so on 800 bpi tapes
but 1600 and 6250 will self-clock. The 9914 is very touchy about sticky tapes
though since the tape tension system doesn't have much mechanical play once a tape
starts to bind.

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