From: <[EMAIL PROTECTED]>
Date: Tue, 28 Oct 2003 11:50:39 -0600
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.
Well we have some clues here. It is true a good floppy with an OS on it that can be booted from will start up a machine with no hard drive and a bad hard drive. It may not be able to start up a machine with SCSI cable and term issues.
I don't think you have a good floppy or the C500 wouldn't have spit it out. floppy in an eMAC?/ Do tell how that works ;-) perhaps an add on USB floppy Chances are good 7.5 is too old to boot an eMac.
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?
Remove the term power jumper on the CD player. You say both cd and hard drive have term power not a good thing. Also no termination pin should be on cd. These sort of issues will get a machine from booting! best of luck. Will S
>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."
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