Re: MDD IDE vs. SCSI, battle of the busses?

2011-11-01 Thread Bruce Godfrey
Bruce Godfrey wrote: I just discovered another effect of having hard drives on the ATA66 bus. The computer would not enter sleep mode before, but now that the only drives are the two on the ATA100 bus, it goes right to sleep when I click that button on the login screen. Go figure. Bruce Kr

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-31 Thread peterhaas
> IDE PCI cards appear as SCSI cards for some reason, I think that is what > you are referring to. This is because at the time Firmtek was designing their Mac ROM for the Promise ATA/33 card, the only model device which would work was one which was modeled as if it was a SCSI device. Sadly, Firm

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-31 Thread Clark Martin
On Oct 31, 2011, at 2:43 AM, Bill Connelly wrote: > Doesn't Apple treat IDE channel drives, as if they were SCSI in some sense? I > thought they did for a while ... maybe this might explain the mystery or SCSI > voodoo, as it is called ... and, then again, maybe not. > IDE PCI cards appear a

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-31 Thread peterhaas
> Doesn't Apple treat IDE channel drives, as if they were SCSI in some > sense? I thought they did for a while ... maybe this might explain the > mystery or SCSI voodoo, as it is called ... and, then again, maybe not. Nope ... as long as there has been IDE/PATA in Macs, there has been an IDE/PATA

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-31 Thread Bill Connelly
On Oct 30, 2011, at 9:58 PM, Bruce Godfrey wrote: The only other place you can put hard drives in this machine is at the back in another two drive carrier adjacent to the ATA100 header on the MB. I had one IDE drive and one SCSI drive there. With just those two together everything was

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-30 Thread Bruce Godfrey
Kris Tilford wrote: On Oct 30, 2011, at 12:55 PM, Bruce Godfrey wrote: Can any of you think of any reason why having drives on the ATA66 bus is incompatible with having a SCSI drive? No, there shouldn't be any interference between a SCSI bus and an ATA bus. Some ATA100 & ATA133 HDs have prob

Re: MDD IDE vs. SCSI, battle of the busses?

2011-10-30 Thread Kris Tilford
On Oct 30, 2011, at 12:55 PM, Bruce Godfrey wrote: Can any of you think of any reason why having drives on the ATA66 bus is incompatible with having a SCSI drive? No, there shouldn't be any interference between a SCSI bus and an ATA bus. Some ATA100 & ATA133 HDs have problems with ATA66 spe

MDD IDE vs. SCSI, battle of the busses?

2011-10-30 Thread Bruce Godfrey
I have a 1.25GHz MDD DP that has been running happily for a couple of years from a single 80GB IDE drive on the ATA100 cable. The drive is almost full now so I decided to try implementing my longer term plan yesterday, which is to use my ATTO UL3D card and a SCSI drive for the system and apps