White Screen, Apple Logo, Spinner on startup after failed software update.

Hi, so my Macbook was performing poorly this morning and I decided I would try to install updates. The updates started normally, but around halfway through the bar stopped moving and the text underneath it said, "Running Installer Script." I left it alone for about three hours, came back, and saw that it was still doing the same thing. I decided it was time to try to reboot, and foolishly held the power button down for several seconds until it turned off. Upon turning it back on, I discovered that it would only go as far as the white screen with the apple logo and the thing spinning under it for about 20-30 seconds, then the screen will go black and it will try to start up again. I started it in verbose mode and it gives the following errors before crashing:
disk0s2 i/o error 0 [level 3] [readuid 0] [facility com.apple.system.fs] [errtype io] [errno 5] [iotype read] [pblknum 233675120] [lblknum 540]
disk0s2 i/o error 0 [level 3] [readuid 0] [facility com.apple.system.fs] [errtype io] [errno 5] [iotype read] [pblknum 233674536] [lblknum 467]
disk0s2 i/o error 0 [level 3] [readuid 0] [facility com.apple.system.fs] [errtype io] [errno 5] [iotype read] [pblknum 233674640] [lblknum 480]
I haven't tried booting from the disk because my disk drive has been broken for a while and needs to be replaced. I assume this problem is my fault, but I would very much appreciate anyone's input on how to resolve it.

Hello and welcome to Apple Discussions...
You would be better off posting in the Leopard v10.5 forum here.
Using Mac OS X Leopard
This is the Safari forum. Just copy/paste the same post over there.
While you are waiting for a response there, try the help here.
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
You can get replacement system disc(s)...
Call Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.
Carolyn

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