Hi All,
I'm having some trouble using secondary hard drives and wanted to run
it by the list for scrutiny and hopefully, a solution.
The current snag involves a 4 gig. external HD that I was using to
install OS 7.1 onto a Quadra 700. At first I put the install disks for 7.1
onto a newly formatted 2 gig. hard drive. This drive was in an external box
and I copied the install disks (and some other data) to it from my Powermac
7100 (OS 8.1, 136 megs RAM). I then took the drive out of the external box
and put it into the 700. I started the 700 from the Disk Tools 7.6. When I
tried to install the OS, I got a dialogue box telling me that I had to
install from another disk or from floppies.
I put the 7.1 Install Disks onto a 4 gig. hard drive (the drive in
question) in an external box. My intention was to connect the 4 gig
external drive to the 700 and install the OS from it. I did so and the
installation went smoothly. (Again, I had started the 700 from the 7.6 Disk
Tools disk.) I should note at this point that I had left a folder with the
7.1 Install Disks on the 2 gig. drive in the 700. I assumed there was no
problem in this. I considered it just another folder that I was storing.
However, upon restarting the 700, the Install Disks were all there but there
was no System Folder.
At first I thought that the 700 had booted up out of another Disk Tools
folder that was on the drive, but no, the full complement of control panels,
etc. was there. Get Info requests for these folders indicated that they
were located in the Install Disks. I couldn't locate the System Folder, but
I could boot up, provided something was plugged into the 700's SCSI port.
What I did next was restart from the Disk Tools disk and trash the 7.1
Install Disks. In effect I was trashing both the Install disks and System
7.1 itself. My intention was then to restart the 700 from Disk Tools and
install 7.1 from the external 4 gig. drive. At that point though, the 4
gig. drive would not mount. The 7.6 Disk Tools told me that the drive was
unreadable and offered to initialize it. I thought that I could maybe try
to install 7.1 in another way but before I got to that I tried to connect
the 4 gig external drive to my 7100. SCSI probe told me that the attempt
failed because the drive was unsupported.
So now, a drive I had, moments before, used on two different machines,
was not readable by either. A drive with a lot of data on it, I might add.
This is the second time this sort of interchange has ended with an
unreadable drive.
The first time, I was downloading data from the web using a browzer on
a drive running 8.6 but directing the downloads to a second drive on which
7.6.1 was installed, both drives being situated on a 6100. The next morning
thec drive with 7.6.1 would mount and was was found by various utilities to
be ureadable.
I would appreciate it if a learned lister could point me to the hidden
punji sticks here. What kind of data exchange is possible between OS's and
between the 68k. and PPC machines and under what circumstances? TIA.
Regards, John.
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