7600+G3/400+SCSI woes |
November, 15, 2002 8:53 AM |
nct |
After I upgraded my 9600 to a Sonnet G4/800, I ordered one of the cheap 7600 that are being offered by poweron.com to take my orphaned Sonnet G3/400 card. The intention was to run OSX 10.2 on it. I wanted to install OS9 on the 2GB drive that came with the unit, and install a 9GB Seagate with with an 80->50 Pin converter. I installed OS9.1 without a problem using the original 604e CPU, since 9.1 is really adamant about not installing to a machine with an upgrade card. (The symptom is the misleading "Can't read Installation Tome..." error.) I then installed the 9GB and initialized it with the Disk Utility as 2 partitions (6.5+2.xGB) to get around the 8GB boot limit. Everything was fine until I put the Jag CD into the CD-ROM drive so I could start the install. At that point, the machine hung with all the symptoms of waiting for SCSI drive to respond. I took the chain apart, and noticed that the Apple drive does not have a jumper on the TE pins, but according to some Knowledge Base articles it shouldn't be enabled because termination happens in the cable. The CD-ROM was terminated with an installed jumper. Trying various combinations of terminations and drive orders failed. The only way I could get the machine to work is to use the slow motherboard SCSI connection. That allowed me to install 10.2 and I'm now running 10.2.2, but I still get occasionaly hangs. Note that the original hang happens in OS9 too, so this is not an XPF problem per-se, but I think this is the forum that is most likely to have seen this kind of behavior on this machine. I find it hard to believe that all 7600s behaved this way, but I can believe that I have a bad ribbon cable, or the original drive should have been jumpered and it was misconfigured etc. If some other 7600 owner could provide info on how they solved it would be appreciated. /nct |
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RE: 7600+G3/400+SCSI woes |
November, 21, 2002 1:14 PM |
nct |
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Thanks for the input. The problem turned out to be the 12x CDROM that came with the machine. I swapped it out for an older 4x drive I had lying around, and the machine has been up and running 10.2.2 with the extra hard drive and the original drive, (with the TE pins enabled, just for the heck of it,) on the high speed connector. The original CD-ROM does have a termination jumber installed, and removing it causes hangs even faster than with it, so I assume the problem is internal to the drive. I'm debating whether it's worth my trouble to have Poweron take the drive back and send me another, since the machine is still under the 30 day warranty. Thanks again. /nct |
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RE: 7600+G3/400+SCSI woes |
November, 19, 2002 9:13 AM |
naturist |
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I have a 7500/7600 that started life as a 7200, but became a 7600 via motherboard swap. It has two internal drives along with the usual CD Rom and floppy drives, and I have had no trouble of this sort. I have replaced both internal HDs, and can tell you that one (and only one) of the two is terminated, the last one on the chain. I don't know about any cable termination, mine is terminated on the drive. It came that way with the original drive, and I've kept it that way, and it works without drama. I know that OS X is a lot more fussy about SCSI termination than OS 9 is. My vote is for your theory that original drive should have been jumpered but was not. |
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