Im new to this forum and using NAS.
I purchased my first NAS a Synology 411J 1½ month ago (without disks).
I already have a WD Caviar Green 2TB (WD20EARX)drive, so talking with the dealer I bougth another 3 2TB disks (WD20EARX).
Also I checked that the WD Caviar Green are recommended on the Synology Web page. And many dealers sell them with the 411J.
I set the thing up in a Raid5 setup.
Everything has worked fine, and Im now in the process of filling stuff pictures and audio to the NAS.
Then 2 days ago suddenly the NAS started to beep, and it turned out, that one of the disks failed.
I looked on the net, and then I removed the faulty disk, and put it in again. And then I was able use the repair on the disk control screen.
The consistency check is now 100%, and now everyting is fine again and all the diskes are running normal.
Now I have looked on the net regarding the issue of LLC count. My diskes react different to this.
Look the schedule below:
Disk 1, Type=WD20EARX, RRER=0, SUT=6091, POH=697, LCC=189
Disk 2, Type=WD20EARS, RRER=163, SUT=1216, POH=886, LCC=676
Disk 3, Type=WD20EARX, RRER=0, SUT=5525, POH=673, LCC=37570 (This disk failed!, but works now)
Disk 4, Type=WD20EARX, RRER=0, SUT=6416, POH=673, LCC=37580
RRER = Raw_Read_Error_Rate
SUT = Spin_Up_Time
The idea with a nas and raid 5 was to have all data collected safe and like a backup in Raid 5, in the unlikely event that a disk should fail.
Im worried reading on the net, is WD20EARX no good for NAS and especially Raid 5?
Please give me comments om this.