From: B. Degnan (billdeg_at_degnanco.com)
Date: 2007-03-22 13:07:24
Is there anyone here who has successfully replaced the original Tandon 602s with an ST-506 brick in their CBM D9060? The specs seem to indicate that these are compatible drives. There is a sprinkle of posts on the web here and there about replacing the Tandon drives on the 9090/9060, but I did not find anything specifically about an actual ST-506 as a successful replacement. I have successfully replaced the 602s with an ST-225, but it's a 1/2 height drive which makes it hard to fit everything back into the chassis. The 506 is a better fit. I would prefer to use the 506. The cylinders and heads on both drives are 153/4 according to Internet sources. I have 8 NOS St-506's, so far the first two have not formatted on the CBM "D9060". Background: When I install an ST-506 drive and enter ?ds$ I get the "73" OK code, the controller, etc. are OK. To install the 506 I removed a working/booting ST 225; I have confidence in the hard drive controllers/power/cables. I was able to get both 506's to pass diagnostics in an IBM XT, but so far I could get neither to format on the XT. Could be partially functional drives/bad luck? Watching the formatting, my XT HD controller looks for a 154th cylinder and then the process bombs. I am not sure if the ST-506, being only 5MB, is too old for the XT controller, but I can't imagine that the controller is not able to handle the 506. It's an orig stock IBM XT controller. Do I have bad drives? Try a third drive? I have more drives to try, but I thought I'd ask before I unpack another 506 for experimentation. One last thing...I call this a "D9060" because I snipped jumper J14 on the controller to change from 6 to 4 cylinders. Bill D Message was sent through the cbm-hackers mailing list
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