It did repair, then the drive briefly appeared on the desktop, greyed out, then it disappeared. I hit Repair - though with great fear, as I was afraid it would not work well with a RAID1 type situation. It showed that the header was damaged and it needed repair. Wow, ThirteenXIII you are a lifesaver! OK, so I couldn't mount and unmount the drive because that option was greyed out in the Disk Utility, but I did click on Verify. Is the enclosure toast? Is it the RAID controller? What next? Can I just extract one drive, put it in a different enclosure and get the data off it? What do I do? Thanks! So: Why is it not showing on the desktop (Finder), and why is it showing as 0% used in WD Drive Manager?Īnd: How do I get this to work? I have some very important data on it - that's why I had it in RAID1. It is exactly the same situation and the same readings when I hook it up to my iBook. I launch the manager, and it shows the following info: Temperature: OK and RAID Status: Healthy. The drive appears there as well, but shows as Used Space 0% which is wrong (actually it's some 45%). I also have the WD Drive Manager installed. When I select "info" it shows as USB connection bus etc. Here's what it looks like: I can see it in Disc Utility, though it doesn't show the name I gave it, instead it has a generic 2TB WD My Book Media and disk5s2 name under it. the drives spin up, and the LED lights show activity when I plug the USB cable to the iMac and pull it out again. There appears nothing wrong with it, externally, i.e. Throughout all this, all the other drives show up, but not this one. So it's probably NOT a problem with the iMac. So it is not a problem with the USB interface on either the WD drive or the iMac.ħ)connected the WD drive to my iBook running 10.4.11 - same result. So it is NOT a bad USB cable.Ħ)I disconnected the USB cable completely, and connected the WD to the iMac through a FW cable and the FireWire800 port. So it is NOT a bad port/ports.ĥ)I tried a different new USB cable. Here's what I did:ģ)I disconnected the USB cable on both the WD and on the iMac, and reconnected several times.Ĥ)I tried all the USB ports on the iMac. This morning, I saw one of the external drives (the 4 TB) was not showing on the desktop. I have a number of drives plugged into the iMac including a few more WD My Book drives. The WD drive is configured in RAID1, and about 40% full (i.e, there's about 900GB on it). Problem external drive: Western Digital My Book Studio II - 4 TB (2 x 2 TB) USB 2.0/FireWire 800/400/eSATA Desktop External Hard Drive. Late 2009 iMac 27" i7 2.8GHz 8GB RAM 1TB HDD Seagate running OS X 10.6.7
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