No, you can’t unfortunately. I’ve tried it and it doesn’t work. I think the IDE controller in this line of Performas doesn’t support the master/slave protocol.
What happens if you try? Is only one drive seen or neither?
The easiest way is to use the external SCSI port with a standard HD enclosure. Which, btw, would also be uber useful for a lot of other things given you have multiple machines.
[@Mr Knoch, don't try this until confirmed, which it probably won't be, but I'm curious]: Hmm, can SCSI Target Disk Mode be used?
"With the change to IDE drives starting with the PowerBook 150 and 190, Apple implemented HD Target Mode, which essentially enabled SCSI Disk Mode by translating the external SCSI commands via the ATA driver. Officially reserved for Apple's portables only, the mode was supported by all PowerBooks except the 140, 145, 145B, 150 and 170.
However, SCSI Disk Mode can be implemented unofficially on any Macintosh with an external SCSI port by suspending the startup process with the interrupt switch, as long as all internal drives on the chain can be set to different IDs than the active host system's devices."
en.wikipedia.org
The wording of this implies that this method for target disk mode on a SCSI Mac could work with an IDE drive Mac, because it doesn't say "
unofficially on any internal SCSI drive Macintosh". OTOH, I can't see how suspending the startup process with an interrupt switch on an internal IDE-based PowerMac could support the feature, because as it says earlier, it'd need to use the HD target mode, which requires the AT driver to translate external SCSI commands and that's not possible, if the startup process has been interrupted.
But it does give a clue on how to make it work, even though that won't be very helpful for the OP. It should be possible to write an application which implements HD target mode, translating SCSI commands. I think you'd have to run it with VM off and somehow stop the OS from writing to the disk. But it is one possibility, a possibility much more costly in time and money than buying a Blue/Zulu SCSI ;-) .