WD60EFRX in Qnap TS-659Pro2, read my ordeal ....

Am now in possession of 8 pieces. WD60EFRX for Windows computer I can not give negative feedback, the drive is fast, quiet and stable,
but from what I would caution is to operate these currently in a Qnap TS-659Pro2 (Raid5 or even 6) with firmware 4.1.1 (and including)
In mid-October, this plate was still included in the support list QNAP, after a short time but this was removed,
lt. IE research were apparently a lot of problems with the disk in the above box to light what probably decided this was to be removed from the Komptabilitätsliste,
Unfortunately, this was then too late for me, 14 days were accomplished and the migration process (Data backup, clean install, config, data-restore) lasted at least
more than a week (about 12 TB of data with unfortunately many small files)
* Will also equal a recommendation to use ROBOCOPY from the WIN-CMD with E Z W parameter / / /: 1 / R: 1 / DCOPY: T / NP /Log:[Pfad\Dateiname.log] receives sacred Zeitspempel Folder and files: -) *
after less than one and a half weeks in normal operation went off, only a small excerpt from the system log:
[Hard disk 4] I / O error, sense_key = 0x3, 0x11 = asc, ascq = 0x4, CDB = 88 00 00 00 00 02 5e B9 f5 40 00 00 00 08 00 00th
[Hard disk 6] I / O error, sense_key = 0x3, 0x11 = asc, ascq = 0x4, CDB = 88 00 00 00 00 02 9 06 40 00 00 00 C2 08 00 00th
[Hard Disk 2] I / O error, sense_key = 0x3, 0x11 = asc, ascq = 0x4, CDB = 88 00 00 00 00 01 86 1 d c2 08 00 00 00 08 00 00th
etc.
[Hard disk 5] medium error. Please run bad block scan on this drive or replace the drive if the error persists.
[RAID5 Disk Volume: Drive 1 2 3 4 5 6] RAID device in degraded mode.
[RAID5 Disk Volume: Drive 1 2 3 4 5 6] Error occurred while Accessing Drive. 3
[RAID5 Disk Volume: Drive 1 2 3 4 5 6] add drive 2 to the volume failed.
In short, almost tackt in 24h had a disk write error, an exchange on the res-Disk also did not always glat,
since the rebuild often had another error, all plates were to exchange always tested with the WD-Disktool and subjected to zero format,
and had no errors !!!!! nevertheless, it always came back in the box for these errors (now on all discs)
the Support page of Q-NAP was also not helpful, the included information are unfortunately scrap :-(
, but certainly not suitable bottom line a good product for my purposes, so there is only mediocre rating
ps. The disc is since short again in the Q-NAP Support List (end Dec, 2014), since today 01.06.2015 there is a firmware update (4.1.2) for the box,
let's see if the positive effect, luckily I have not deleted my migration backups, and always updated: - /