Using TLER enabled WD enterprise harddrives on an Intel onboard raid controller, is that good or bad?
Many of the more software based raid styles, like the simple onboard Intel raid, will wait for a long time before freaking out, they can be much more forgiving than a fully hardware based raid Card with onboard processor and onboard ram. Besides you have to Have an error first :-) If my disks were having errors and flaking out the raid to often, in reality I would WANT TO KNOW , even if that means it bails out and I have to reboot , halt the system, and let it complete a hardware task. Then next I am going to be wondering what error it got, and why to took so long to "fix" or hide it.
The noise about the ammount of time set on the TLER is important for many raid systems, so knowlegable raid experts would always say that the time needs to be limited, and "There Is No Other Way". But the same experts will also admit that the more consumer based systems are fully capable of handling the situation of a drive not responding as quick. Because they are more consumer based.
Tidbits from a manufacture: From http://wdc.custhelp.com/app/answers/detail/a_id/1397/p/227,279
It would be Good to read the rest there. Notice how a Cavier "black" does not define a "raid drive" for WD. The (RE) designation does. How many times have you seen users say that "blacks" are the ones to use in a raid system?
Myself I have used consumer disks and more consumer based raid systems for ages, i rarely get errors of ANY sort, and have never had a problem with a consumer drive in a consumerish raid system. I am not running a Web Server, I have a fair idea as to how the hardwares are reacting. I think some of the noise about TLER is overrated. Again, VERY important for some raid systems, or even configurations, but is nothing but noise to me, because all my stuff has not skipped a beat.
If you want less problems you get the right stuff, if you are a cheapskate :-) you can get away with more than any expert would say you could. I also treat my hard drives like they are easily damaged, that means my computer should not even be bumped, while it is spun up.
These answers are not supposed to be "opinion" so the Facts are "proper drives should be used in raid systems" Especially important for high end "full" raid cards. The facts also are that thousands of users are running raid systems with consumer and even green drives with long TLER times in the intel onboard and other lightweight raid controllers . both with a relative ammount of troubles from either.
If the TLER time is greater than the preset timeout period for the controller, the controller could mark the drive as defective, even though the drive is just trying to repair bad sectors. <--- that is the key.
NO TLER is not noise .. I lose 2 wd caviar blue myself were in raid for 1 year and suddenly they dead without any notice. TLER is VERY important for any raid system..