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[smdear]

I inserted 4 of the abovementioned hard drives, requested RAID1 and Ext3 file system.  After the format completed I requested extended scans be done on all 4 drives.  The test results are sporadic across the 4 drives, sometimes they succeed, and sometimes they fail.  I have tried moving the drives to different locations in the chassis, but am seeing similar results.   These drives are brand new, as is the DNS-343 chassis.  I am uncomfortable deploying the chassis with these kind of results.

Can anybody think of why I am seeing this behavior ?

Thanks,
<Myles>

[TOR889]

I have 4x2TB LP drives instead. My initial 4 drives have sporadic fail & success SMART test. When I test the unit with real files, it seemed like the drives were degrading randomly. At the very beginning, I was thinking that the 2TB LP drives were not compatible with the unit. Fortunately, for every failure, I marked down the serial # of the failed drives. Very soon, I noticed that there're only 2 serial # repeat over and over again. After replacing the 2 drives, everything works like a charm. Then one week after putting the functional unit to the test, one of the replaced drive failed again. This time it was in the middle of playing a movie. The drive letter disappeared. And the drive never show up on the raid again. It is now about 3 weeks since replacing that drive. Touch wood, everything seems to be working fine.

Consider the initial failure rate of the Seagate drives (3 failures out of 7 drives), at least in my case, don't hesitate to bring them back for replacement. I believe the place you bought the drives will not be surprised to see them back for replacement. On the bright side, there's a 3 years warranty for the drives.

As a side note, the drive failure also allows me to test the RAID rebuild, which is quite straight forward and uneventful.