[rescue] problems with CDROM on Ultras after opening
twmaster at twmaster.com
Tue Apr 26 16:31:28 CDT 2005
On Apr 25, 2005, at 11:58 PM, Paxton Hoag wrote:
> Right you were, the door drive gear had split. In the Ultra 1 CD-ROM
> drive, which I opened up, the gear had actually fallen off and was
> loose inside. That is why the door opened and closed at the whim of
> gravity. I don't know if I have any superglue but if I do I will try
That might just do the trick.
> Both drives are 12 speeds, Toshiba XM-5701Bs.I suspect the Ultra 2
> dive has the same problem. Can you substitute a CD/RW in place of the
> CD. I have a couplle of Yamahas (2X & 4X, block selectable) I also
> have a 4X Plextor CD/RW but I would rather not dismantle the external
The block size needs to be set to 512 bytes for booting. 
> At the moment I am doing things the hard way, which all to common for
> me. Looking in the parts box I found a SCSI 3 to SCSI 2 converter and
> hooked up an original Sun single speed caddy type CD-ROM.I have the U2
> installing Sol 8. It works but oh so slowly. Hmm I should be using the
> external Plextor, it is at least 4 times faster that the one I am
> I haven't been able to look at the U2 CD as it is still installing SW.
> going on 7 hours now. I unpluged the internal CD to get the external
> to work on ID 6.
Yepper slow. <Yoda> Painful it is. Yes.</Yoda>
> Thanks, everyone, for all the tips. It really helped.
Proof that cats are smarter than dogs. You will *never* see 8 cats
trying to drag a sled through a blizzard.
 On older machines like the 4, 4C and 4M etc. boxes you need the
CD-ROM to be set to 512 byte block else they won't boot. They will read
disks just fine otherwise. I have not been able to remember if this is
true for Ultra machines or not even though I have a distinct memory of
a U30 not behaving well until the jumper was set to 512.
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