🚀 go-pugleaf

Hi!

I'm having trouble with my new hard disk.
The disk is a Micropolis 1355 disk with an ESDI interface, which is
connected to my ST by means of a BMS 200 board and an Adaptec 4520
SCSI <-> ESDI adaptor.
The trouble is that sometimes formatting results in errors or in a lot
of bad blocks. Also when used data is not always read properly.
The drive often makes a grinding sound just like the floppy does when
it is not formatted properly. It looks like it is retrying.
Often it succeeds on the second try.

All this is rather inconsistent. The blocks that are reported bad 
differ from one day to another. 
Does someone have an idea whether this is most likely due
to the Adaptec controller, the drive, or the power supply?

Any suggestion is welcome. I'm getting quite desperate on this.

PS: Sometimes the supra formatter comes up with the error message
"Invalid cartridge" when formatting the drive. On other occasions it 
will do the job. ICD sometimes gives error code 112. On other occasions
it will hang making this grinding noise. hdx3.0 refuses to format the
thing (check cabling). 

Thanks in advance,
Frans Meulenbroeks        (meulenbr@cst.prl.philips.nl)
	Centre for Software Technology
	( or try: ...!mcvax!phigate!prle!cst!meulenbr)