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I have a hard disk mounted using fstab like so:
/dev/sdd1 /media/DATA_TWO ext4 defaults,errors=remount-ro 0 2
Occasionally after resuming from hibernate, the /media/DATA_TWO folder appears empty and I cannot write to the drive. When I use Disk Utility to refresh SMART data, I get this error:
Error retrieving ATA SMART data: helper failed with exit code 1: Failed to check if disk /dev/sdd is awake: Operation not supported
I see this error in dmesg:

[19659.651976] sd 4:0:0:0: [sdd] Unhandled error code
[19659.651977] sd 4:0:0:0: [sdd]  Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK
[19659.651980] sd 4:0:0:0: [sdd] CDB: Read(10): 28 00 00 03 04 00 00 04 00 00
[19659.651985] end_request: I/O error, dev sdd, sector 197632

If I touch /media/DATA_TWO/testfile I get this error:
touch: cannot touch '/media/DATA_TWO/testfile': Read-only file system
and this error in dmesg:

[19782.065457] Buffer I/O error on device sdd1, logical block 0
[19782.065459] lost page write due to I/O error on sdd1
[19782.065478] EXT4-fs error (device sdd1): ext4_find_entry:934: inode #2: comm touch: reading directory lblock 0  

If I reboot, the drive is accessible again. What could be happening?

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closed as too localized by Luis Alvarado Mar 14 '13 at 16:18

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