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MZ-B3 & 80-min. disks

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Russell Letson

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I just got my venerable MZ-B3 back from the repairman, and find that while it seems OK with 74-minute disks, it will not initialize or reliably read 80-minute ones. I hadn't used them before the B3 went into the hospital, so I can't say whether this is 1) a function that it never had or 2) a problem with the repair.

With a blank 80, the machine just thrashes and never initializes. But if I record a few seconds on an 80 with a different (and newer) machine (B-100), the disk will initialize (sort of) on the B3, though with a lot of indexing and thrashing. If I try to *record* on one of these disks, there's a MEM OVER message and then lots more thrashing. If I stop the recording, the TOC EDIT goes on indefinitely and can only be stopped by a power-down.

A medium-serious rummage through various sites and manuals yields no answer. Has anyone used 80-minute blanks with a Sony of similar vintage--say, an R-3 or R-35? Or is this a firmware limitation of some sort?

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