Re: Internal HDs not recognised


"Davidson" <geodav45@xxxxxxxxxxx> wrote in message
news:64fe758c-9bfc-477a-b742-f13f26864e3d@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Preparing a G4 Powermac for sale I erased (x7 took 4 hours) an
internal HD that was used for Time Machine, but then found that
neither the icon for this nor that for the main HD with Leopard
installed was showing on the desktop. Rebooting (with the aim of
erasing the main disk) I just got a gray screen with the 'prohibited'
sign. Using Cmd-Opt-O-F I tried firstly 'mac-boot', with no result,
then 'eject cd' which enabled me to load the Leopard instal DVD. From
this I launched Disk Utility which detected neither HD. I then loaded
Disk Warrior with the same result. I then removed the HD I had erased
- still no joy. So by erasing one hard drive I appear to have
corrupted both to the extent that neither are now recognised. Any
ideas on a solution please? It beggars belief that both disks would
fail during the one operation. Or perhaps it doesn't?
George

I've noticed that a Mac will do something with a connected disk without
being asked. For example, a disk from one Mac won't boot, so I configure it
as a slave and put it in another Mac. I expect to be able to boot the
second Mac, then use something like Disk Warrior to inspect the slave disk
with the intention of either repairing it or recovering at least some of the
data from it.

But before I can interact with the Mac, it has inspected the file system on
the slave disk and tried to "repair" it. I accept it probably didn't affect
whether or not I would have been able to recover any data, but it did
surprise me that it trued to do anything at all with the disk!

I suggest you take each disk in turn and connect it as a slave to a PC.
Boot the PC, and re-format the suspect disk. Also run any diagnostics you
choose.

Alternatively put each disk in turn into a PC as the ONLY disk, and boot a
CD-based OS such as BartPE or Knoppix which you can then use to format and
exercise the disk

Then install each disk - one at a time - into your Mac. Install the
operating system as normal.

--
Graham J




.

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