DISK I/O errors

View attachment 109423
Yesterday I was running a full image backup (with Paragon 2013) of the first 2 drives pictured. Output was going to the 3rd drive (in a USB enclosure). BUT the operation failed due to disk 2 I/O error. the Paragon log was of no help but win 7 event viewer showed this warning (event ID 51) "An error was detected on device \Device\Harddisk2\DR3 during a paging operation." multiple times just as the aforementioned error happened.
Asus G73JH - 2 drives - intel 80 GB SSD and Seagate 500 GB HDD. The backup storage is in a Nextstar3 USB enclosure and is also a Seagate 500 GB HDD.
I have run check disk with Scan for and attempt recovery .. and no issues were reported.
Thanks in advance, Josea

Additional INFO - I just got a low memory report, I have 6 GB physical memory (three 2 GB sticks) but Win 7 is only seeing 2 GB ... and I have 1 GB swap file on the SSD.
NOTE I did a system reset and 6 GB RAM is being seen by Win 7 so as Radji stated this additional info is not related.

 

The first suggestion would be to try another usb enclosure and see if the I/O error persists (but the same hard drive).

 

Thanks Radji, I don't have an spare on hand but I will put it (the drive) in the second bay of the asus & do some extensive tests!
I also noticed a disk1 issue (driver detected controller error on Device\harddisk1\Dr1 ERROR event ID 11) when I attach said enclosure to a different computer (the Sager in my signature) and use it .. but coping to and from it seems fine.

 

The low memory error is interesting. But it may not have anything to do with the external drive's I/O error. The two errors you describe point to the enclosure's internal controller possibly being faulty...which is common. I've got multiple external enclosures and have seen a couple of them fail even though the hard drives in them were A-OK.