On Nov 8, 2008, at 5:12 AM, Finn Thain wrote:
On Sat, 8 Nov 2008, Joshua Juran wrote:
So far, I haven't been able to boot my 950 while a drive connected to
the external bus was powered on. The external drive's access
light goes
on immediately after the screen lights up grey, and startup gets
as far
as drawing the Mac OS splash screen and maybe 12 pixels of progress
before halting, resuming normally if I power off the external drive.
Any ideas?
I see the same issue sometimes. I don't think it is a termination
problem
but it is hard to say. You could try installing drivers from HD SC
Setup,
Drive Setup, Silverlinig or HDT etc.
I had no such problems using a removable storage drive, although I
had to tighten the cable before it was recognized, so it may have
been a cabling issue originally.
Anyway, with regards to startup devices, there's no distinction
between the buses. If you select the device at SCSI ID 5 on bus 1,
the XPRam value is set to 0xFFFFFFDA, just as it would be for bus 0.
And if a SCSI ID is shared by devices on each bus, selecting the
external one in Startup Disk beeps and sets the XPRam value to
0x00000000.
Solution: Pretend it's all one bus and give everything a unique SCSI
ID. Or, just don't 'upstage' the boot disks (with a device of the
same ID on a lower-numbered bus).
(Bad news if you were hoping to have eight or more different startup
disks...)
Josh
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