Here are some results from my attempts to connect a Hitachi U320 10K drive to my Mystic:
1) The U320 drive won't work at all with my SCA -> 50pin adaptor. The adaptor works fine with other SCA drives. The U320 drive works fine with a SCA -> 68pin adaptor, both attached to a JackHammer Wide SCSI card and with a 68 -> 50pin adaptor and onboard SCSI.
Any insight on this one is welcome. Both SCA adaptors are the "fully passive" type.
2) The U320 drive isn't bootable in the Mystic. When booted off a 7.1.1 floppy, the drive doesn't even show up in SCSIProbe. It mounts fine (and is smokin' fast!) when the Mystic is booted off another hard drive with System 7.5.5.
I suspect this is because the Mystic has a 53C96 SCSI chip that supports 5MB/s synchronous SCSI, but the ROM driver for it only runs the SCSI bus in asynchronous mode. After booting System 7.5.5, SCSI Manager 4.3 is active and the SCSI bus is run in synchronous mode. I'm remembering correctly that 7.5.5 has SCSI Manager 4.3 for Quadras baked in, right?
Sometime soon I plan to copy the SCSI Manager 4.3 extension onto my 7.1.1 boot floppy. I expect it "should" work in 7.1, since the AV quadras shipped with 7.1 and they have SCSI Manager 4.3 in ROM. If the drive magically shows up after I put the SCSI Manager 4.3 extension on there, then the hypothesis is confirmed.
1) The U320 drive won't work at all with my SCA -> 50pin adaptor. The adaptor works fine with other SCA drives. The U320 drive works fine with a SCA -> 68pin adaptor, both attached to a JackHammer Wide SCSI card and with a 68 -> 50pin adaptor and onboard SCSI.
Any insight on this one is welcome. Both SCA adaptors are the "fully passive" type.
2) The U320 drive isn't bootable in the Mystic. When booted off a 7.1.1 floppy, the drive doesn't even show up in SCSIProbe. It mounts fine (and is smokin' fast!) when the Mystic is booted off another hard drive with System 7.5.5.
I suspect this is because the Mystic has a 53C96 SCSI chip that supports 5MB/s synchronous SCSI, but the ROM driver for it only runs the SCSI bus in asynchronous mode. After booting System 7.5.5, SCSI Manager 4.3 is active and the SCSI bus is run in synchronous mode. I'm remembering correctly that 7.5.5 has SCSI Manager 4.3 for Quadras baked in, right?
Sometime soon I plan to copy the SCSI Manager 4.3 extension onto my 7.1.1 boot floppy. I expect it "should" work in 7.1, since the AV quadras shipped with 7.1 and they have SCSI Manager 4.3 in ROM. If the drive magically shows up after I put the SCSI Manager 4.3 extension on there, then the hypothesis is confirmed.