[comp.sys.att] Can't Write VHB - drives are good

brad@bradley.UUCP (09/15/90)

HELP ME PLEASE.

I have 2 drives (on 40 meg miniscribe, and on 71 or 67 miniscribe).
Both came out of 3b1's but were used else where.  The problem is that
I can format them on the other machine, but when I try on the 3b1 it
tells me that it can't write the VHB.  What can i do to get theses
things to format.  I have tried 2 different 3b1, both report the
same thing.

Bradley Smith
Bradley University
formerly at bes@holin.att.com (AT&T)
now at brad@bradley.bradley.edu

brad@bradley.UUCP (09/16/90)

UPDATE:

The drives both work under MS-DOS, I just got done formatting them and
loading files on to them......so what next I still get this error

brad@bradley.UUCP (09/18/90)

More on problem:

Looks like it might be the power supply.  I formatted the drive
on another machine.  the interesting thing is that I even put the
disk drive on its own power supply.  So this tells me that power to
the motherboard must be bad ( I even tried a different mother board).

Can anyone tell me what the -12V on the motherboard does?

brad@bradley.bradley.edu
Brad Smith
Bradley University

roger@rogerf.austin.ibm.com (09/20/90)

In article <9300085@bradley> brad@bradley.UUCP writes:
>
>I have 2 drives (on 40 meg miniscribe, and on 71 or 67 miniscribe).
>Both came out of 3b1's but were used else where.  The problem is that
>I can format them on the other machine, but when I try on the 3b1 it
>tells me that it can't write the VHB.  What can i do to get theses
>things to format. 

I have experienced this exact problem before.  The bad component,
believe it or not, was the power supply.  Yes, the machine would
power up diagnostics, completely format the drive, then fail
with "CANT WRITE VHB"  or something like that.  In the case of
my power supply,  the solder around a number of the pins for
the ribbon cable had cracked.  I re-soldered all the pins, and
was back in business.

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