I tried TattleTech and Mt. Everything, and both of them don't even show any drives present on the SCSI bus. Is SCSI probe enough different that it's worth trying too? It's kind of a pain for me to generate more 1.4MB Mac floppies at the moment, but I can do it if SCSI Probe is different enough to be worthwhile.
I also opened the case, and took at look at the motherboard and the SCSI controller chip. They all look fine-- no obvious corrosion. I also reseated the internal SCSI cable and the drive's internal power connector.
If the drive media had failed, or even if the driver were corrupted, I would expect it would still appear on the SCSI bus wouldn't it? You just wouldn't be able to mount it or read from it. But since it doesn't even appear on the SCSI bus, I think the problem must either be failed drive electronics, or failed SCSI controller chip.
One other detail: this problem actually began while I was using the Mac. I'd been using the SE/30 for several hours, no problems with the hard drive. I was running from a System 6 floppy, using the HD as temp storage for copying data between floppies. Running single-Finder, a SEA that I was running failed, dumping me back to the Finder, which suddenly told me "The Desktop on HD80 must be rebuilt." Then a moment later "The Desktop on HD80 can not be rebuilt." Then suddenly HD80 was just gone.
One other outside possibility is that the problem is due to a dead PRAM battery. I know that can cause some Macs to fail to boot, but I thought fail to boot meant "won't turn on" and not "won't recognize hard disk". Still, I've ordered a replacement PRAM battery to replace the 1989 vintage battery that was in there, so we'll see if it helps.
The worst thing about all this is that the SE/30 isn't even mine! It's part of a friend's collection, and it was working fine at his house two days ago, so I feel guilty about "breaking it" somehow.
I also opened the case, and took at look at the motherboard and the SCSI controller chip. They all look fine-- no obvious corrosion. I also reseated the internal SCSI cable and the drive's internal power connector.
If the drive media had failed, or even if the driver were corrupted, I would expect it would still appear on the SCSI bus wouldn't it? You just wouldn't be able to mount it or read from it. But since it doesn't even appear on the SCSI bus, I think the problem must either be failed drive electronics, or failed SCSI controller chip.
One other detail: this problem actually began while I was using the Mac. I'd been using the SE/30 for several hours, no problems with the hard drive. I was running from a System 6 floppy, using the HD as temp storage for copying data between floppies. Running single-Finder, a SEA that I was running failed, dumping me back to the Finder, which suddenly told me "The Desktop on HD80 must be rebuilt." Then a moment later "The Desktop on HD80 can not be rebuilt." Then suddenly HD80 was just gone.
One other outside possibility is that the problem is due to a dead PRAM battery. I know that can cause some Macs to fail to boot, but I thought fail to boot meant "won't turn on" and not "won't recognize hard disk". Still, I've ordered a replacement PRAM battery to replace the 1989 vintage battery that was in there, so we'll see if it helps.
The worst thing about all this is that the SE/30 isn't even mine! It's part of a friend's collection, and it was working fine at his house two days ago, so I feel guilty about "breaking it" somehow.