I recently purchased 4 WD20EARS with the plan to replace 2 smaller drives in my DNS-323 (firmware 1.09) and to put 2 drives into probox HF2-SU3S2 (eSATA attached 4 bay enclosure) for backup. I've had this DNS-323 for over a year but did recently upgrade the firmaware in anticipation of installing 2tb drives.
I installed the two new WD drives and configured them as JBOD. All was well at first after days of loading my files to the DNS-323. I tried running the backup from the DNS to the probox and after about 80% there was a drive error on the DNS-323 and when I rebooted it, it didn't recognize one of the inserted drives. I ran data lifegaurd diagnostic tool against the drive and sure enough it failed. Took it back and got a new drive, went thru the same setup/copy and then again during the backup it failed. This time the DNS-323 could still recognize both drives but seemed to get a consistent error on a specific file I read/copied/backed up. I removed both drives, ran diagnostics against them and they both failed the short and long tests. Meanwhile the two drives I installed in the probox are working fine(read/write) and the diag utility finds no problems.
I now end my sad story with a question, does the DNS-323 damage the drive or is the issue that is being described in these posts limited to loosing data while installed in the DNS-323 but the same drive works fine installed in a desktop?
Andrew