Hello, I have a n5200PRO FW 2.00.18.4. I changed harddisk from 500 GB models to 2 TB models (ST32000542AS). I tried it 2 times and what happen was in both that in seems as the N5200Pro damages the brandnew harddisks somehow. In the first try harddisk in slot 1 and 3 got bad and "warnings" after minutes after the RAID building was finished and I tried it again with 2 new bought! harddisks where the harddisk 3 now has also warnings "current pending sectors", This harddisk model ist listed in the compatible list. thats why I in summary bought 7 arddisk which I do not know if it will work at all.
Could you please help?
What does warning in relation to the following varaible mean?
Current pending Sector 74 or 92 Reallocated Sector Count 92
Current pending Sector and Reallocated Sector Count are S.M.A.R.T-Messages from your HDs. Those message indicate that your HDs are damaged and should be replaced. I have no idea what demages so many drives in your N5200. Have you checked the fan? They are perhaps getting to hot?
I'm having the same issue with 2 NAS units (n8800sas / n7700plus) and a brand new batch of 13 of these drives. So far I've had about 5 - 6 of them change to warning with IO errors appearing in my logs. I've now lost both of my arrays and Thecus Support are trying to piece back together the one with data on it.
I've tested all these drives with SeaTools (long test) and I'm getting no error codes, although I am, getting the same current pending sector problems. I've taken two of the drives, put them in a desktop and I'm running a 30 hour write / stress test on them to see what happens. I’ve already finished a full ntfs slow format on them. I will then run full (long test) with SeaTools again and see if there are any error codes. If not then it looks like some sort of compatibility problem. So far Thecus support don't have any suggestions on the root cause of my many failures, they are still looking into it.
I will let you know how I get on. Personally I think it must be a firmware compatibility issues of sorts, I just have no clue what. Hopefully someone from Thecus will work it out.
This might also help explain, it's one of my many responses..
We have been testing those HDD's with FW CC34, so that's the same FW you have. We did get a few reports from customers having issues with those drives, I even had 2 machines from customers in my office (with those HDD's) which where having issues. Both cases where new HDD's, but in both cases 1 HDD was faulty.
Our HQ is doing some extra testing with those HDD's, but they couldn't find a problem so far.
Please note that the "reallocated" and "current pending" sectors are being reported by the HDD itself, the only thing our software does is reading those values.
But, a "reallocated" or "current pending" sector does not mean it's a bad sector. It just means that there has been a read/write error on that specific sector. Also, testing an HDD with "reallocated sectors" can indicate that there are no bad sectors. The sector that has been re-allocated to another sector and is disabled, so a bad block scan won't find this sector in case it's bad.
Another reason can be because those HDD's have ERC (Error Recovery Correction). In general it can happen that there is a small read/write error, the problem is that desktop HDD's try to recover this error. While they are recovering they do not report to the SATA/RAID controller, so the SATA/RAID controller thinks the HDD is broken, which it isn't actually.