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romanon
October 18th, 2017, 10:34 PM
Hello, i have Miniscribe 2012 hard drive connected ONLY to power supply without any data cables connected. Disk LED have recurring blinking, there is video below. Any ideas?

https://youtu.be/3G5wnVBDRdI

modem7
October 18th, 2017, 11:03 PM
In some Miniscribe manuals, the blinking error codes for the drive are explained.
For example, look at the bottom of the manual for the M8425S, at [here (http://stason.org/TULARC/pc/hard-drives-hdd/miniscribe/M8425S-21MB-3-5-HH-SCSI1-SE.html)].
If (repeat: if) it shares the same error codes as your drive, then the pattern is 1000, which equates to code 8.

gslick
October 18th, 2017, 11:39 PM
In some Miniscribe manuals, the blinking error codes for the drive are explained.
For example, look at the bottom of the manual for the M8425S, at [here (http://stason.org/TULARC/pc/hard-drives-hdd/miniscribe/M8425S-21MB-3-5-HH-SCSI1-SE.html)].
If (repeat: if) it shares the same error codes as your drive, then the pattern is 1000, which equates to code 8.

Code 8 - Unable to uncover Track Zero sensor

In some Miniscribe drives that error can be caused by the position indicating flag on the shaft of the head positioning stepper motor having worked its way out of position. On some of the drives where that was the case there was a test jumper block on the controller board of the drive that could be shorted together and then when the drive was powered up it would go into a mode where the position indicating flag could be rotated back into the proper position. The set screwed holding the flag in place on the shaft needed to be loosened, and then the flag could be carefully rotated into or out of the path of the photo detector just until the threshold of the LED turning on or off. Right at that threshold the position indication flag should be back into the proper position and the set screw should be carefully tightened without rotating the flag or the shaft. Then the drive would be powered down and the jumper removed and if everything went just right it would power up normally again after that.

That was 30 years ago when I had to do that to multiple Miniscribe drives. I'm fuzzy on the details now.