From: Richard Tarbell: > There is no reason, if you have a good floppy, that a bad hard disk should prevent you from booting from floppy. Even if there were no hard disk at all, the computer should boot up on a good floppy with the proper OS on it. Just to make sure your floppy is good, try booting up your C-500 with it.
I tried booting my C-500 with the OS 7.5 (part 1 of 19) and it ejected it, too. I can open it on my C-500 and my eMac (once they're already booted) and they show the icon, so I know the floppy is "good." I'm wondering, though, should any computer boot from an install disk or does it need to be a boot disk? I'm going to try your advice and remove the RAM sticks and see if I can get anywhere. Thanks, again. From: "Drew Beckett" >Don't give up hope yet, there's always the tried and true solution suggested earlier by Richard of installing the hard drive into a working Mac with a SCSI chain and installing a "base system" onto that, then putting that hard drive back into your J700. I really like this idea, it would seem to be the most painless approach. But, first I have to find someone with a working Mac with a SCSI chain. . . >snip >I've tried several of the above sites and burned floppies. >/snip What are you "burning" them on (I would use the term imaging)? Just plain ol' vanilla 1.4 meg floppies. >snip >If anyone could set me straight on termination, I would be much = obliged. >/snip >I isn't as bad as it seems, since we're only on SCSI2 Narrow. I'm assuming you're using the dedicated internal bus (no external connection), because if you're using the internal/external bus it will 1) be slower, and 2) be more difficult to troubleshoot, especially if one of your devices uses active termination. Yes, I'm pretty certain that I'm using the dedicated internal bus. I tried plugging the scsi cable into the internal socket by the external scsi port (I'm guessing that this is the internal/external bus?) and produced identical results. >Make sure that no drives except the one on the end of the SCSI cable (not necessarily the last/first SCSI ID!) are terminated. Do this by making sure none of the devices in the middle have large, removable resistor packs (8-10 pin single row inline pin package (SIP)) installed in a straight line near the 50-pin IDC connector, and by removing any jumpers for "Drive Termination" AND "Termination Power". The CD-ROM has a small 2 pin jumper on the Termination Power. Could this be the problem? There is also a 4 pin jumper for the "parity" and "sector size." Sound okay? >On the last drive on your chain, make sure either the resistor packs are installed or a jumper is placed over "Drive Termination". The last drive on the chain is the SCSI hard drive and it does have a jumper on the Drive Termination and Term Power. >Ideally, the S900 should supply termination power to the bus, so you won't need to worry about that. If it still isn't working, enable "Termination Power" on the last device on your chain (same as the oneyou just terminated). This is a J-700 and I don't know whether it provides term power or not, but there is a jumper on the hard drive for "term power." >A boot floppy with SCSIProbe will be able to tell you if the bus is terminated properly. It's fairly easy to use, since all you do is open it and it will either give you a "SCSI Bus improperly terminated" error or give you a listing of all the devices it detects attached to your SCSI bus, and will even let you mount the filesystems it finds in most of them. I say most because I'm willing to entertain the possibility that there exists a drive it can't mount, but I haven't found it yet. I'll give this a try. Thanks! >A note on SCSI ID's: you shouldn't need any jumpers for ID 0, conventionally the jumper block on SCSI devices are read binarily, that is, no jumpers is binary 000 or SCSI ID 0, a jumper in the first block is binary 001 or SCSI ID 1, a jumper in the first and second block is binary 011 or SCSI ID 3, and so on and so forth. This is good to know. One less thing to worry about. Again, a big "thanks" to Richard, Drew and everyone else that has contributed to my J-700 resurrection project. Scott Birdwell DeFalco's Home Wine & Beer Supplies -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
