G5 startup problem after shutdown of frozen installation of new software...

Hi all
I got a massive problem. My G5 was installing software from dvd and got stuck for some reason. Nothing worked and I had to shut the whole system down. When I now start the G5 it comes up with a white screen with just a small folder in the middle of the screen displaying a question mark and alternates that with the apple face. Besides this the fans go mental and after a minute or so I have to shut it down again. Mouse and Keyboard are responseless:(
What can I do to get it starting up again? - I need the data on the system drive as I did not have time to back it up yet:((((

It lost its pointer to the startup disk, so you are seeing the "?" which equals "Can't find system"
The directory and file system likely are corrupt and need to be repaired.
Before installing, always insure one or two backups, one that is bootable. And a copy of Disk Warrior is handy.
Boot from another drive using the OPTION key, hard drive, firewire, DVD and repair your system.
Backup first, is always faster and less hassle and good insurance policy.
Use SuperDuper; Apple Restore in Disk Utility.
If you can't use the OPTION key or boot from CD/DVD, then pull the drive and put it in a FireWire case for later repair and recovery.
And do make sure you have a clean safe fresh Apple OS boot drive that is ONLY used for emergency maintenance, repairs, etc.

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HI Jay,
Sorry I disappeared for a while. This server is part
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>
We got things working ok by following your steps from
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) Make a backup of the store directory, as well as
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iplanet/server5/msg-instance/store/mboxlist to a
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10) ran "start-msg store" and let it complete, once
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up all other services manually (i.e., pop, http,
imap, etc)
Which I did, until step 9, when it gave me the
following error:
reconstruct: cannot list quota roots: System I/O
error. Administrator, check server log for details
So I started the messaging server and then
reconstruct -m ran successfully, but we're back in
the exact same boat with the same users having the
same problems.
I can fix the users getting the IMAP error by moving
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>
>
Thank you so much for any help you can provide. I
hope I am giving you good information to go off of.
Thanks,
Greg

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G5 startup problem after shutdown of frozen installation of new software...

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