Volume on External Hard Drive Suddenly Disappeared

Hello
I'm having problems with an external hard disk which i partitioned into two volumes several months ago. Since this afternoon one of the volumes will NOT mount on the desktop of OSX 3.9 The other volume on the same external drive DOES mount.
I restarted my mac using OS9 and the mystery volume reappears on the desktop, (which is reassuring because i can see that all my files are all still there). But some of these files are only useful to me with OSX applications.
How can i get this volume to mount?
I've already tried in Disk Utilities. It's name appears, but in that faded colour which means that my mac knows its there, but refuses to mount it - even when i ask nicely in Disk Utilities. I even asked Disk Utilities to run a check of the disk and do any necessary repair work.... which it did and now tells me that the volume "seems ok"! But unmountable :((
I've just tried connecting the disk to a neighbour's mac (OSX) and same problem, even using his cables. But i can still get the mystery volume to mount on a OS9 desktop...
Would be grateful for THE solution :)) ...urgently!
dswimmer

Hello! I've seen problems like this before and sometimes Diskwarrior can repair the directory for that volume when diskutility can't. Have you tried booting from the install cd to see if disk utility can see and repair it there? Tom

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Hey guys,
I know this question comes up a lot so I'm suprised to say I've failed to find any fixes on other threads. Many people having the same issue say that the drive shows up temporarily in the events and project source windows but then disapear, this is not the case for me it just doesn't show up at all. I've put 90% of my fcp projects and events onto one external hard drive which is working fine with everything but fcp, it even recognises it if i want to import from the drive. It has been working fine up until now which is weird as I've not changed anything on it recently, the only thing I've changed is I used a client's drive to do the latest edit, which worked fine!
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llyrhughes wrote:
Hey guys,
I know this question comes up a lot so I'm suprised to say I've failed to find any fixes on other threads. Many people having the same issue say that the drive shows up temporarily in the events and project source windows but then disapear, this is not the case for me it just doesn't show up at all. I've put 90% of my fcp projects and events onto one external hard drive which is working fine with everything but fcp, it even recognises it if i want to import from the drive. It has been working fine up until now which is weird as I've not changed anything on it recently, the only thing I've changed is I used a client's drive to do the latest edit, which worked fine!
Someone must have found a solution to this problem by now, it's causing me a lot of trouble as I've got deadlines to meet and I'm being put out by what seems to be a ridiculous little bug, surely apple would have got onto a fix for this by now?? In the mean time all and any suggestions welcome!
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