Can you please power off your device and remove your drives (when conventient)? Then, power the device back on with out the drives in ( remember to label or organize your drives in a way that you will remember which drive goes into which drive bay ). Does the problem persist?
Daytrdr, does this bold part really matter or are you just being dilligent?
The reason I ask is I a comtemplating swapping out my unit and I have asked your staff if I can just pull the drives out of one unit, and put them in another and it will recognise them. Your/WD T2 staff says “it “should” work”", but disclaims “backup your data prior to trying in case there are problems”… (basicly telling me, they dont know)
Do you know for fact?
All drives are JBOD. (In case you were wondering)
Yes it kind of does matter. Depends on your RAID level too. For example if you’re using RAID 1 or 5 it probably won’t matter as much as a RAID 10. If you’re using a RAID 10 then I would suggest marking your drives and inserting the first mirrored set into the unit and waiting a few minutes for the blue LED’s to stop blinking first before inserting the next mirrored set into the unit and completing the RAID 10 stripe. Because these units allow for RAID Roaming techinically you could just pop em into the device in any random order and let it attempt to rebuild your volume but you’re just asking for trouble like that.
For me the difference was… First time I replaced my EX4 I put each drive into the unit one at a time like WD suggested, only inserting another drive as the system LED stopped blinking. After this process I had to let it rebuild my volume which took over a full day. This in my opinion is the wrong way even tho it’s suggested. I tried something else today instead. Again mine is configured as RAID 10 here. I inserted drive 1 and 2 mirrored drives into bay 1 and 2 and waited until it read the drives as a set and system LED stopped blinking (took like 3-4 minutes). Then I inserted drives 3 and 4 into the unit in bay 3 and 4 and let it read the second mirrored set and complete the stripe. This method allowed the device to immediately read the drives properly and required no rebuild.
So using this theory and results, and depending on your level of RAID, you want to insert any mirrored set of drives at the same time so it can read the mirror and not just half a mirror. No need to power down at any point since it’s hot swappable.