Just to save others, the SDLT drives apparently have a high temp sensor and
spits the tape back out if drive is over temp.
We received a 3U rack mount enclosure from Compaq with two SDLT drives.
Being good software guys, we immediately removed the covers to see if there
was any OpenVMS software inside.
While running test backups on our 8400 VMS test box, both drives proceed to
Call 1-800-OK-COMPAQ. Got the usual response ... Oh, that's what one looks
like. We will send out a hardware guy with replacement drives (after
deciding that the only thing common between the drives is the power supply).
Field Service guy shows up two days later with two new drives and new power
supply (that's the only three things in the enclosure) and we report that we
had fixed it.
What we did is put the cover back on so the field service guy would not know
the software geeks had been inside the case. Drives work fine when the case
fan can draw air through the SDLT drive and cool it down.
OBTW, the OK-COMPAQ guy said if we were to use the DECtape III cleaning
cartridge, we would destroy the drive in a matter of seconds. Seems that
there a special cleaning tape needed (No Compaq Part Number yet ... but is
available as a Quantum part MR-SACCL-01 from your local DEC (oops ...
Compaq) reseller. I don't know from personal experience whether drive can
be "destroyed in a matter of seconds", however, I did tell you to look.
Happy holidays to everyone!