No RAID, just plain drives connected to the Intel onboard controller. And TLER is actually other way around - a TLER enabled drive (good for RAID) gives up the recovery process in time up to 7 seconds maximum, after that the RAID controller takes over. A normal drive (Green, Blue, Black) with no TLER can do recovery for as long time as it needs - seconds, minutes, if it wants even hours.
I am glad you understood what I meant, we are talking about the same thing but it has been years since I read about it. Up until my next drive array purchase I will never have used it because previously the drives that supported it cost double the price.... I assume that the "Red" drives support this technology, otherwise they are a long way short of being RAID ready drives.
o be fair with WD20EARX, one of them did die within a month after purchase, so that could be classified as sort of DOA. So in my case it was about the pathetic show WD20EARS drives provided - i actualy had a situation where i bought a drive, it died within few months, then the replacement died within a month, then a replacement of a replacement died after a year, and then it got replaced by WD20EARX which runs to this day.
A work colleague of mine had a similar thing happen with a bunch of Seagate drives, the entire RAID 5 array destroyed itself twice within 2-weeks, with no recoverable data, each drive tested OK, then the massive scandal broke. Seagate (my once beloved HDD manufacturer) released an entire range of HDD's without even testing them in real world situations, basically the firmware was totally fu*ked, they denied there was a problem at all for 3 whole months..... either way, back to the story, my colleague had 4 drives replaced "twice" (8x drives replaced inside 1-month (only bought 4)), they were all useless, he got a full refund and bought 4x drives from another manufacturer (either WD(if so Green) or Samsung cant remember which manufacturer) and has never had a problem with them since.
WD20EARS had 4.83% failure rate. Maybe i was unlucky, i don't know. Still, i have only one working and one failed WD20EARS remaining, all other drives were RMA'd over the time to WD20EARX drives
In my personal (and working as a computer engineer) experience we have a pretty good correlation (not scientific) between HDD packaging from the supplier to us and the failure rate. We once bought 20 (twenty) identical HDD's and had a massive failure rate compared to a previous 20 (twenty) otherwise identical drives bought across several orders, we assumed that these drives had been thrown around by the couriers or shipping. Going back even further than this, over a decade ago I used to work in the sales department of a very large UK PC builder/supplier, in one month there was a silly amount of PC's returned with dead HDD's..... it turned out that an entire "Pallet", many hundreds of HDD's were given a hefty drop onto an unmoving concrete floor, the failure rate was above 50% within 1-month, no doubt it spiralled higher and higher as time went on and the drives were used more and more.
That is one thing that is almost worth ignoring about SSD's.... packaging, its almost irrelevant compared to HDD's. Personally I will actually spend £5 per drive more buying from a company who I know treats their HDDs with respect and packages them well, OCUK is pretty damned great on this point, Scan comes second IMO and the rest vary quite a lot including once I saw a case of "return without testing" because you can see the HDD through the ripped cardboard box..... no packaging at all, 4x 1/5lb drives (2KG) will rip a cardboard box open when thrown around by the average courier" (that was an unknown distro with 4x £400 server grade SAS drives (they repeated this again because they are dicks and at last count wiped out £2400 of HDD's (6 out of 8 that was in 2-days, likey chances are that the other 2 were toast as well) due to a total disregard of packaging)).