Last week i bought the WD My Book Studio Edition II 6TB. I got this to use as my TimeMachine back-up drive. I have a MacPro with three 1TB drives and one 2TB drive installed. I also have my iTunes library on an external 1.5TB drive. All the data on these drives comes to about 3TB. When i opened the MyBook Studio i installed the WD Drive Manager software, connected the MyBook to the Mac using the FW800 cable, opened Disk Utility, selected the MyBook in the list of HD’s, clicked the First Aid tab and clicked Repair Disk. After that finished, i clicked Verify Disk.
Everything seemed to be fine with the disk so i set it as the TimeMachine disk and proceeded to do a full back-up of all my hard drives. After maybe 2 or 3 hours i returned to find that the back-up had failed after about 400GB. There was a warning message on the screen about the disk been ejected. I cant remember the exact words. The WD Drive Manager menu bar icon had disappeared too. On the front of the drive the the top and bottom of the LED indicator light was flashing every second.
I had read in the manual that this means it’s over temperature condition. I removed the power supply from the back of the MyBook and left it to cool over night. The next day i plugged it back in. The drive appeared in the sidebar of the Finder. The LED indicator was still flashing every second, even though the drive had been just plugged in. The WD Drive Manager reported the temperature to be ok, RAID status was healthy but used space was 0% even though there was over 400GB of an unfinished back-up on it. I opened Disk Manager > First Aid and clicked Verify Disk. I got a lot of error messages so i repaired the disk and verified it again. I then reformatted the disk just to make sure it was ok. I then ran the TimeMachine back-up again. This also failed after a couple of hundred GB.
I thought, maybe the back-up was too big to do in one go, so after repairing and reformatting the disk again, i excluded all but the Macintosh HD (300GB) from the back-up. This back-up finished without a problem. The LED Indicator seemed to be working correctly too. I turn off the MyBook and next day i added a second drive (295GB) to the back-up and this also finished without a problem. Later that night i did the 3rd drive (580GB) which also worked fine. Next day i added the 4th HD and this failed. I opened Disk Utility and got more errors while verifying the disk. After repairing the disk i deleted the unfinished back-up of the 4th HD and tried again. This time it worked. I left it for another day and added the 5th and final HD to the back-up. This was also the largest of all the drives, with over 800GB of data.
After a few failed attempts i got it done. At this stage i was sure it was a problem with the drive over-heating while doing large back-ups, and would be fine, as i would only be doing small back-ups from now on. Later, i powered back on the MyBook and selected it in the sidebar of the Finder and i got the spinning beach ball which caused the Finder to freeze, so i ran disk utility. I tried to verify the disk which showed loads of errors. I then tried to repair the disk but this failed and showed error messages (See attached screen shots). Once again, i removed the power cord from the MyBook. This morning i plugged it back in and it was the same but this time i was able to repair the disk. The LED indicator was still flashing every second and the WD Drive Manager wasn’t showing so i pressed the power button on the rear of the MyBook to turn it off. Just now, i turn it back on and it seems to be working fine.
I’m pretty sure there is a problem with this drive now. Has anyone else experienced problems like this, or should i just contact tech support? I have two other WD external HD’s (1TB and 2TB MyBook Essential Edition) that i’ve previously used for back-ups and i’ve never had a single problem with either.
My apologies for such a long post. I didn’t want to leave anything out.