Re: RAID newbie, 1 vs 5, chunk sizes

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On 18 June 2014 11:19, Dag Nygren <dag@xxxxxxxxxx> wrote:
> On Monday 16 June 2014 13:36:44 Nuno Magalhães wrote:
>> Hi,
>>
>> On Mon, Jun 16, 2014 at 3:23 AM, Phil Turmel <philip@xxxxxxxxxx> wrote:
>> > Before going any further, check the TLER/ERC support for these drives.
>>
>> Both Seagate ST1000DM0003 don't have that:
>> Warning: device does not support SCT Error Recovery Control command
>>
>> The Toshiba DT01ACA100 seems to have, but disabled:
>> SCT Error Recovery Control:
>>            Read: Disabled
>>           Write: Disabled
>>
>> I couldn't find any specs with specific details on this feature for
>> the Toshiba, and i'm not sure if it's safe to issue smartctl -l
>> scterc,70,70 on a drive thay may not support it. If it's disabled as
>> an incentive to buy more expensive drives, will the drive just ignore
>> this command or will it decide to roast?
>>
>> Are there any - recommended - consumer-grade drives out there that do
>> support TLER? I was going for 1TB@7200, but that can change. I started
>> disliking Seagate after a ST31000528AS died on me. They bought Maxtor
>> a long time ago and recently bought Samsung's disk division. I've had
>> no qualms with Toshiba. I'm not so sure on WD, they used to be less
>> that good; and haven't tried Hitachi. What say you?
>
> Just love my HGST 4 TB drives. The first ones that haven't
> developed any pending/remapped sectors during the 9 months
> they have been in 24/7 use. Previously tried different Seagates, with
> constant problems (And yes - Had the SCT turned on). Also tested a WD red,
> but saw similar symptoms developing and so degraded that to a storage
> disk for my boy...
> HGST was some 20€ more expensive and hard to get here but definitely
> worth it.
>
> YMMV
>
> Dag
>
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If we're comparing drives, my 8x WD20EARS / EARX have been spinning
for years. 2 drives just failed after ~3.4 years uptime (24/7) and
over 400,000 head parkings. They had weekly SMART self-test and
monthly RAID6 scrubs, and a few unexpected power losses. Good value.
But YMMV.

Mathias
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