New to Mac :), OSX 10.4.3 won't recognize my external hard drive!!

Please help,
I just bought a new mac (powermac g5 2ghz, 1gb ram) and i have two external hard drives plugged in and they are not showing up anywhere? Do i need a specific driver? I am downloading the update for 10.4.3 (combo) even though i already have 10.4.3 because i read this might fix it, but it seems to take forever to download, in the meantime, any advice?
Thanks in advance!
Jana

i just read this on macfixtit and reinstalled 10.4.3 using the combo update and it worked for me.
Solutions
Reverting to a previous version of Mac OS X Though it is a relatively tedious and time-consuming workaround, downgrading to an earlier version of Mac OS X (preferably Mac OS X 10.4.2) as described in our tutorial "Reverting to an earlier version of Mac OS X" is an almost fail-safe solution to this problem.
Re-applying the Mac OS X combo updater Despite a lack of success for some users with this workaround, re-applying the Mac OS X 10.4.3 combo updater continues to resolve this issue for many.

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