At 10:18 AM +0000 3/20/03, pdimage.fsnet.co.uk wrote:

>>Now, with everything turned on, the system locks up at a blue screen and a
>>frozen pointer in the upper left of the screen while it's starting up.
>>Turning off the external drives lets it boot, but it seems to take a long
>>time. Once in the finder, turning on an external locks up the system
>>immediately. I haven't had a chance to test the drives on another system so
>>I don't which part(s) might be damaged. Obviously, this is not good, but
>>just how bad is this and is there anything I can do?
>>
>>thanks, jim
>
>     I think it's possibly unwise to power up the computer before the
>external scsi devices - I've never used external drives but I think they
>should be powered up before the system.
>     Best thing to do if it boots is fire it up with the externals off
>and zap the pram a few times by holding down the command/option/p/r keys
>after the boot chimes. Then restart again and rebuild the desktop by
>holding down the command/option keys until you get the rebuild dialogue.
>Then shutdown after the rebuild - turn on the externals first - and
>startup again. If it boots have a look in the devices section of the
>apple system profiler under the apple menu and check the scsi id's and
>info the internal drive should be on scsi bus 0 id 0 and the externals
>should be on scsi bus 1 with id's from 0 - whatever the limit is - 15?
>     If it boots but the externals don't show there may be problems with
>the drivers for these and some diagnostic utilities may be required to
>get them to mount.
>
>     Pete

At home I have an external Zip drive. I turn it on before the computer, and
I turn it off after turning off the computer. I agree that's probably
safer. However, I do have a SCSI scanner that I turn on/off while the
system is on. I do that because the lamp stays on all the time and I don't
use it that often.

Zapping the pram and rebuilding the desktop sounds like a good idea. I'll
defintely try it.

thanks, jim







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