Hot Diggety! Joshua Bassi was rumored to have written:
>
> Does anybody know offhand the estimated number of cleanings an IBM LTO
> cleaning cartridge supports before it should be disposed of?  Thanks in
> advance.

Exactly 50. ;) It's got a built-in counter on the tape, and the IBM
libraries will report this via front panel LCD (at least, on the 3584,
it does). I believe it returns an error if you try to use it a 51st time,
from my recollection of the manual, but don't hold me to that.

-Dan