RD53 failure modes

2020-02-10 Thread Carlos E Murillo-Sanchez via cctalk
Hello folks; I've recently had some free time and decided to look at some hardware failures in my small collection.  I fixed a couple of analog boards in the compact Mac department, and a failed scsi disk in one of them prompted me to test the small stash of such drives that I have.  Turns ou

Re: RD53 failure modes

2020-02-10 Thread Fred Cisin via cctalk
On Fri, 7 Feb 2020, Carlos E Murillo-Sanchez via cctalk wrote: system originally came with an RD53 that has sat elsewhere for 25 years.  It passed a read test in 2005.  So I tried to see if I could read it and maybe image it now, but no go. The disk spins up, initiates a seek (the arm is not st

Re: RD53 failure modes

2020-02-11 Thread shadoooo via cctalk
Hello, definitely you should be able to fix it. This kind of problem is caused by the missing thickness of the rubber stoppers of the positioner, which became goo in the years. You have two ways to solve this problem. First of all, remove the disk top cover plate in clean room, locate the positione

Re: RD53 failure modes

2020-03-08 Thread C Murillo-Sanchez via cctalk
On Mon, Feb 10, 2020 at 6:16 PM Fred Cisin via cctalk wrote: > On Fri, 7 Feb 2020, Carlos E Murillo-Sanchez via cctalk wrote: > > system originally came with an RD53 that has sat elsewhere for 25 > years. It > > passed a read test in 2005. So I tried to see if I could read it and > maybe > > im