To throw a completely crazy idea out, could it be that your mains electricity supply is playing up, resulting in spikes or brownouts? I guess some drives may be more sensitive than others to that sort of thing. Feel free to ignore me as I'm not even sure that makes sense—you would think that computer power supply would take care of those, right?

Best regards,
Gleb Dolgich
PixelEspresso

24 April 2013 03:21





This has happened on 3 of my machines: MBPro 17, MacPro (dual quad), iMac 27 - 
and with drives from Seagate, G-Drive, and now Mini Stack.
It's happened on basically what are fairly new drives (just months old).

K


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24 April 2013 03:03
I had the same problem with a Seagate external drive, could read it, but writing to it would fail.  Even tried SpinRite on it, let it read the whole drive, no problems.  Formatted the drive copied everything back to it, from a backup. (This was not a time-machine vault).  Everything copied but a couple of days latter it failed again.  Ran the Seagate utilities on  it and it reported a bad drive.  Have not yet seen about sending it in, right now it is being used as a "Offsite backup".  Not sure what I will end up doing with the drive.

(it was a real pain as it was a 3TB FW800 Drive, and at least locally I cannot get those anymore.  But, as the controller pops off, I bought a USB3 one, swapped controllers, and now have my extra backup working.)

Robert



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24 April 2013 02:52
This has happened on a couple of Seagate drives on various machines of mine (MBPro, DUAL QUAD) .. and more recently, on my iMac 27 with a brand new 3T Mini Stack.
(3rd time in less than 3 months).



In fact, it happened 3 days ago. I reformatted, created a brand new backup.  Now tonight, once again.

Clues as to what causes this?

K


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