Mac Forum / General / Hardware / October 2005

I just got a 20 GB Toshiba hard disk (2.5" HDD, 9.5mm, MK2018GAP) so
I could upgrade from OS 9 to OS X.  It installed easily into my
PowerBook G3 (Wallstreet). :)

Using the Disk Utility on the OS X CD, I partitioned the drive: 1st 8
GB for OS X, and the remainder for OS 9.  Both operating systems
loaded flawlessly, but when I try to restart from the hard disk I
get a DISK ICON with a BLINKING
"?" :(

I've reset the PRAM, reset the Power Manager, verified the disk ,
verified the disk permissions, reinstalled the drive, reseated the
processor card, started up with the OS 9 disk prior to a restart,
and done several clean OS installs.  I still get the blinking icon
on  HD restarts.

A search on the internet came up with two possible theories:
1) A model number with an "F" (HDD2164 F) may indicate it is a
Compaq-specific disk.  Some users claim that disks with a "P" or "Q"
in the model number instead of the "F" work perfectly on the
Wallstreet.
2) The drive may be able to be configured as either a master or slave
unit.  Apparently, master configuration is obtained by setting
jumpers A, B, C & D open (no jumper).  Also, if pin 28 = Low,
the drive is master; if pin 28 =High, the drive is slave.

∙ Is it true a disk model can have its use limited to a particular
manufacturer?  If so, is there some way to change its
"firmware" to be acceptable on a Mac?

∙ Alternatively, [b:ec2618e672]how do I jump pins or change a pin
from high to low[/b:ec2618e672]?  The pins on the MK2018GAP are
embedded in plastic which is an integral part of the case. Take off
the cover? Wouldn't that contaminate the disk?
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