[zfs-discuss] Does ZFS On Linux need TLER?

Aneurin Price aneurin.price at gmail.com
Tue Feb 16 07:40:57 EST 2016


On 16 February 2016 at 12:35, Gordan Bobic via zfs-discuss
<zfs-discuss at list.zfsonlinux.org> wrote:
>
>
> On Tue, Feb 16, 2016 at 12:00 PM, Aneurin Price <aneurin.price at gmail.com>
> wrote:
>>
>> On 16 February 2016 at 11:20, Gordan Bobic via zfs-discuss
>> <zfs-discuss at list.zfsonlinux.org> wrote:
>> > The setting certainly doesn't survive a reboot on my Seagates (but all
>> > of my
>> > Seagates are Baracuda 7200 series, of the 4-7 year old vintage, haven't
>> > bought any since then due to astronomical failure rates). They are from
>> > back
>> > in the day when all drives came with TLER (I have 1TB Seagates, Samsungs
>> > and
>> > HGSTs). And all of them require TLER to be set on every boot. I am not
>> > 100%
>> > sure if my WD greens of similar vintage have TLER, I cannot get to them
>> > right now to check.
>>
>> Maybe the desktop drives are different then? I don't buy the desktop
>> drives because they're too unreliable (although I've not personally
>> had them fail within the warranty period, they have all failed
>> eventually), so all my Seagates are NAS or Enterprise drives - except
>> the SMRs but they don't support ERC at all and aren't really
>> general-purpose drives.
>>
>>
>
> What little evidence is available on reliability of desktop vs. enterprise
> grade drives seems to show that there isn't much of a difference.

With wildly varying and often contradictory data available, I can only
really go on the failure rates I've personally experienced.

> But don't
> let that stop you from enjoying your placebo. :)

No need to be a dick about it.


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