HD not found on 2 Color Classics

[dangil]

I have two Color Classics. recapped both logic board. one chimes, the other doesn't

both have trouble finding the internal HD

even booting with a floppy doesn't make the HD show up.

I can hear the disk spinning up

could be something in the front connectors ? maybe cleaning the slot?

 

[Crutch]

I’m not a CC expert but if this happened on an SE/30 I would strongly suspect a cap leak to have damaged traces around the SCSI chip.

Do they recognize external SCSI devices?  If not it’s very likely a SCSI hardware issue.

The disk should spin up if it gets power, even if SCSI is no good, so that’s not very indicative.

 

[Daniël]

Are either of the drives known to be in working condition to begin with? These Macs did come with the Quantum ProDrives that are all rapidly failing these days. They have rubber stoppers that the coil side of the hard drive head uses for shock absorption, that all turn to goo as old rubber tends to do. If it can't move the head, it won't be able to read any data, thus no partition will ever show up under the Mac OS, nor will it boot from it.

 

[NathanHill]

Yes. These hard drives are just dying left and right. Literally was booting from dad’s SE/30 internal drive before recap. It quit working after a recap. External SCSI works fine. They are simply old drives.

There is video on how to repair the Quantums out there.

 

[bibilit]

Most probably drives are bad. 

The drive should spin, then head should move, looking for tracks. 

Head sticktion possible or maybe head park locked in position, happened to me a couple of times. 

Best solution is to remove the top cover. 

 

[Torbar]

Best solution is to remove the top cover. 

there was a whole argument on one of the Mac Facebook groups about this a couple of months ago.  Some guy had a dead Quantum drive, popped it open, there was a plastic piece that was locking the head, if you wiggle it the drive works for a couple of days, and then stops again, and he was asking if it was safe to either remove the plastic piece, or make it so it stays out of the way, and posted a pic of the drive cover popped up, and people freaked out.  "This drive will never work again now that it's been exposed!".  "You should have sent it off for data recovery", like, people were thinking this was his main hard drive on his main computer or something?  whole thread was a mess

But yeah, I've gotten older drives to work again, lots of times seems like either the platters or head gets stuck.  But I have ones that I've popped open years ago, got working, and they still work.  Do it in a fairly clean room(not like, a woodworking shop or anything), don't touch the platters directly, close the drive up as soon as you can, and obviously don't keep anything important on their without a backup.

 

[bibilit]

Yes, obviously there’s nothing to lose. 

The drive is a non worker anyway. 

And yes again on quantum units, I removed that piece of plastic and the drive worked fine afterwards and still is today. 

Some didn’t survived, but were already dead anyway...

 

[dangil]

tested known working drives.. no dice

will test external drive soon..

thanks

 

[dangil]

Ran scsi probe and it says there is a arbitration error. something about scsi termination...

but there is only 1 scsi device and it's terminated

would a bad recap job affect scsi termination ? or the EGRET chip ?

external SCSI is working