HT201514 I recently updated the Imac software, now i can't see my Wd back up drive in 'time machine' Its connected via firewire and i can see its connected if i check firewire on my mac.

I recently updated my IMac software to the latest version, now i can't see by WD back up drive in time machine. its conected to the firewire port ok and i can see it if i check firewire connections. The drive works ok on an old windows laptop. Any ideas.

leedssparky wrote:
Is it possible that i did this whilst updating the OS software whilst leaving the WD drive connected.
It's a good idea to eject and disconnect external HDs, just in case, but that shouldn't cause a problem.
Why when setting up time capsule, does it only look for WIFI drives through airport.
I think you're confusing Time Machine (the backup software) with a Time Capsule (Apple hardware combining a wireless router and HD).  Unless you have a Time Capsule you want to back up to, there's no point to clicking the Set Up Time Capsule button, if that's what you mean:
I've attached the Firewire bus from system profiler, dont understand why i can see it there but not in TM.
There seems to be some sort of problem with the drive, since Disk Utility thinks it's fixed, but immediately the problem returns (per the first sample you posted).
How old is the drive? 
If it's within the warranty period, you might want to contact WD or the place you bought it.

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