Hi,<br>I use iMac G4 (1 Ghz) running 10.4.<br>I recently purchased a Western Digital 160 gb HD (3.5" IDE ATA) and mounted it in an external Firewire enclosure. <br>I also have an external Lacie 30 gb portable HD which I have been using for backing up for several years now. <br><br>Both are connected to individual firewire ports.<br><br>Ref my problem, the first thing I did with the new HD was to partition the 160 gb drive into 2 parts of approx 50 gb and 100 gb. Everything was OK so far. I could see the two partitions on the new HD on my desk top. Then I tried to access the Lacie drive to see if I could move some files across to the new drive and had the beachball spinning merrily for about an hour before I gave up and switched off the iMac using power button.<br>On restarting, the Lacie HD mounted up without a problem, but the new WD one did not.<br><br>I can still see the new drive with its partitions in Disk Utility so I tried to verify and repair the new HD using firstaid, but keep getting an error, 'underlying task reported failure on exit'. The HD was partitioned using Mac OS Extended (journaled) format.<br><br>Can anyone please advise if there is a way to repair this disk at home, without having to send it back ?<br><br>Also, what could be the reason for this to happen ?<br><br>Thanks in advance<br>vrmac<br><br>
I agree. I would use the fastest option, and avoid the partitioning. Also, even if a drive is supposed to be "hot swappable," it is usually a good idea to eject it before pulling the plug. Otherwise, you may get error messages. <br><br><br><br><br>Coming to terms with the notion that life is dynamic.
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Loc: Yuba City, California
Because you installed an IDE ATA inside this firewire enclosure, there may be a conflict between the chipset controller of the enclosure and the ATA interface itself. There is no hard and fast rule that they work together. Have you checked with the manufacturer of the firewire enclosure for a firmware update? Or to see that it will specifically support your brand of IDE ATA drive? I suspect the enclosure is causing the problems. <br><br>The times you're going to have problems is when you're writing to the drive. Copying a file or two may not be enough to interrupt controller services, however before you put this drive in to service you may want to see if you can force it to fail again. Try to copy a file of say a few dozen megabytes in size and see if you can lock it up. If your having controller conflicts that's when it will happen.<br><br>I don't necessarily agree with the others that shouldn't partition your WD. Others have and are doing just fine, I'm sure. Just be sure the enclosure and the hard drive making nice, otherwise this will happen again.<br><br>Also, you could throw the IDE drive into the LaCie enclosure to test it out using that controller chipset. I wouldn't recommend putting the LaCie internal drive into the firewire enclosure lest you lose all your data.<br><br><br>M i c h a e l (OFI)<P ID="edit"><FONT SIZE=-1><EM>Edited by G4Dualie on 01/20/08 09:46 PM (server time).</EM></FONT></P>
Many thanks to you all for taking the time to help. I recognize the names from Maccentral forum where I used to visit some years back. Sorry to see the place is dead now.<br>You may be right about the enclosure being the problem. It is a noname one I picked up on the net.<br>After the first use when I partitioned the drive, I haven't been able to acces it or mount it all. The only way I can see it is in Disk Utility. But I keep getting In/Out errors or error on exit and cannot perform erase or even repartition the drive.<br>Guess I will have to try with a different enclosure. Do you think investing in Disk Warrior or Tech Tool Pro would help to regain the drive at this time, without also changing to a different enclosure ?<br><br>
i think you have jumper setting probs.<br><br>set them both to Cable Select and see if that works. but mb not since it did mount.<br><br>but you might still try it.<br><br>i now you need the newer chipsets for large drive support (>120gb) but that is pretty dated by now and i thnk that if you saw both partitions it means you have it --try one partition and see if it sees the capacity.<br><br>question: did you mean to buy an ata drive and bought an sata instead? (i don't know. i guess you mac will read them in an external if everything matches at the fw box).<br><br><br><br>this one does not support large drives:<br><br><br><br>"in times of peace the warlike man attacks himself."<P ID="edit"><FONT SIZE=-1><EM>Edited by ichi on 01/22/08 03:27 AM (server time).</EM></FONT></P>
Loc: Yuba City, California
Do you think investing in Disk Warrior or Tech Tool Pro would help to regain the drive at this time, without also changing to a different enclosure ?<br><br>No. <br><br>While DW or TTP might also be able to see the drive, just like Disk Utility, they will be powerless to overcome the I/O data corruption originating from the enclosure's chipset/controller. Chances are the data on the drive is still okay. Installing the drive into another enclosure or even a drive bay inside another computer would probably bring the drive to life.<br><br>Ichi makes a good point too. If your IDE ATA drive is new, chances are it came out of the box already configured in the Cable Select Mode or even in the Master mode, in which case either one should work properly. But, if you've changed the jumper block to configure the drive as a secondary or slave drive, you will have to correct that. The label on ATA drives usually have a block diagram of the various jumper settings.<br><br>The first clue was your firewire enclosure and now that you claim it is a no-name brand evens my conviction that it might be the culprit and as Ichi has pointed out, the firmware of the chipset/controller may not be equipped to work with a drive of that size. <br><br>Again, checking with the maker of the enclosure might shed some light on this issue. The maker may have a firmware update that addresses capacity limitations. The only problem you might encounter with the maker would be if the firmware software update requires a Windows PC, in which case you would need to get the assistance of someone with a PC to apply the update for you.<br><br><br><br><br><br>M i c h a e l (OFI)
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