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I'm late to the thread, but this worked great on my new 8x WD10EACS drives.
I've been using two WD 640's in RAID 1 for the last two months w/o TLER, and they've worked fine.
If I enable TLER now, will I have to reformat the drive? Also, will it perform any worse than non-TLER drives?
So I got my two WD640's today and im just going to put them in WHS using DE....
Do I need or is there any reason to enable TLER?
Also does TLER reduce performance?
Does anyone know if the utility will enable TLER on the new 1TB WD1001FALS or any Caviar Black for that matter? I find it ridiculous that this *software* feature would be limited to "enterprise" models only...
I don't find it ridiculous - i think there's a valid purpose in having RE drives TLER-enabled by default and consumer drives disabled TLER by default.
Thanks for the quick reply, very informative. I think I have found the drive for my server upgrade . I've read about the warranty issues which concern me too. If you get a line to someone at WDC that can issue a warrantly correction with little fuss, please let me know.
Allow me to rephrase... I certainly understand the intention and value behind creating an enterprise-class drive. My frustration came from speaking directly with Western Digital who told me twice that if I "insisted" on creating a raid array that my only option was to purchase a more expensive drive. Glad to hear the TLER toggle utility will still work on the FALS.
"The TLER (Time Limited Error Recovery) feature on Western Digital RAID Edition EIDE and Serial ATA hard drives cannot be disabled.
I read that article today and it confused me a bit at first too. Remember that you want TLER enabled for RAID and disabled when using the drive standalone.
If I understand correctly, what this is saying is that you can never disable TLER on any WD Enterprise drive (be it EIDE or SATA) and that such a drive is never intended to be run standalone. However, on a desktop drive (Caviar, SE, etc...), the WDTLER utility can be used to enable or disable TLER (it is disabled by default). My guess is that the utility will only work on desktop drives.
It looks like the wd2500ys is an enterprise "RE" drive so the utility shouldn't be able to modify the TLER settings. Since you are running them in RAID-0, you want TLER on anyway. I found the wiki article on TLER to be a good read too.
one last question, why does the TLER need to be disabled on non-raid drives? i know its not the best place to check, but reading all the reviews on the wd RE drives, many folks are using them as single drives for the OS and storage/stuff
I'm a little disappointed by this conclusion. Software RAID of any level can be done well, and in some cases it's all you need. Shun a particular implementation (SilImage? Shun away!) but don't dismiss the whole concept. Highpoint has a decent implementation, for example, and Linux software raid is very capable and steady.
But all kinds of RAID depend on good drivers, period. If you have bad drivers for your hardware controller, you'll end up with a corrupt array in pretty short order. But if you have good drivers, you'll have no troubles with a software RAID array.
So how do you find good drivers? There are only two ways I know of: word of mouth and try-and-see. I recommend the first, having lost data to the other one. Ask around and see what's recommended before buying.
"fog of anger" I can relate to that.
Thanks for your post update.
Similar technologies are called Error Recovery Control (ERC), used by competitor Seagate, and Command Completion Time Limit (CCTL), used by Samsung and Hitachi.
Does this apply to the new EADS line as well? I have bought two WD10EADS 32MB 1TB and have them in a RAID 1 NAS system (QNAP 219).
Do I have to take the discs from the server and put them into my main computer to run this program or can I run a similar program directly on my Linux system?
I was wondering if the TLER setting needs to be enabled on the caviar black 640gb edition. Someone earlier was saying stay away from caviar black for raid0 except for the 640gb version. Does that mean that person had a successful raid0 config without using TLER on that drive, or do I still need to worry about TLER settings? Anyone ever tried changing the TLER on the WD6401AALS?
will the TLER work the same way with the 2TB desktop models? if so, i may have to return these 1.5TB seagates that are giving me trouble with TIMEOUT errors
I am running 2 black caviar 1 TB HD's in Raid 0. I download the TLER utility to enable TLER on my drives. When the disk boots, it informs me the utility cannot recognize the controller. I am using the onboard ICH10R controller. Any ideas?
Are you running the ICH10R in Raid mode? See if there is some kind of IDE compatibility mode to put it in.
Don