[mythtv-users] 2 TB Hard Drive Recommendations

John Drescher drescherjm at gmail.com
Tue Dec 7 21:23:05 UTC 2010

On Tue, Dec 7, 2010 at 4:18 PM, Mark Knecht <markknecht at gmail.com> wrote:
> On Tue, Dec 7, 2010 at 1:02 PM, John Drescher <drescherjm at gmail.com> wrote:
>>> Note that Green drives are not recommended for raid arrays because of timing
>>> out and goofing your raid array.  WD's "RE" (RAID Edition) HDDs support
>>> Time-Limited Error Recovery ("TLER" ):
>>> More info here:
>>> http://www.tomshardware.com/forum/251076-32-raid-issues-western-digital-hard-disk
>>> I went WD Black RE's and they are speedy and have been reliable.
>> TLER is not necessary on linux software raid or zfs raid. It is needed
>> on hardware raid or on windows software raid.
>> John
> I'm not doubting you John but I never know who to believe. When I had
> problems with a 3-disk RAID1 using WD10EARS drives one of the reasons
> I was directed to the RAID Edition 500GB drives was specifically
> because they did support TLER. There was never another reason proposed
> (that I remember) for that RAID not working correctly.
> Whatever the reason I was completely unable to build a good RAID that
> worked without delays using the WD10EARS. Possibly newer mdadm release
> have solved this but if they have I haven't specically noticed any
> discussion about it on the mdadm list which I am subscribed to.
> I still have 4 or 5 of them sitting here. Should I spend the time to
> see if they've become usable?

There is a lot of discussion about using mdadm on the hardforum.com
website. This along with me having a couple of mdadm arrays with non
TLER WDC black drives makes me believe this is true. Search for TLER



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