[mythtv-users] 2 TB Hard Drive Recommendations

Mark Knecht markknecht at gmail.com
Tue Dec 7 22:02:33 UTC 2010

On Tue, Dec 7, 2010 at 1:23 PM, John Drescher <drescherjm at gmail.com> wrote:
> 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
> here:
> http://hardforum.com/forumdisplay.php?f=29

Thanks John. I'll check it out.

The difference may be you are talking black drives and my WD10EARS are
green drives.


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