[zfs-discuss] Are HGST (Hitachi) Ultrastar and Deskstar the exact same drive?
joe at goldthwaites.com
Tue Dec 2 02:03:31 EST 2014
One more thing I wanted to mention. I purchased these drives from various
Amazon resellers. They're bulk drives, not in a retail box. When checking
the Warranty of the Ultrastar I got this message; "Please return drive to
the point of purchase or system manufacturer." I tried it with one of the
Deskstars and got the same thing.
I think Hitachi used to handle the warranty work directly. Now it looks
like they're making the non-retail drives go through the seller. Who knows
if my Amazon reseller will be in business if and when the drive fails. I
got the drives cheap, about $65 each. I'll be really bummed if I can't get
a warranty replacement if the seller goes out of business.
On Mon, Dec 1, 2014 at 11:54 PM, Joe Goldthwaite <joe at goldthwaites.com>
> Here's the controller on one of the deskstars.
> <http://i.imgur.com/wmtuXJu.jpg> It's got a 32MB memory chip from
> Samsung. I think the LSI Muse-B2B2-:L chip is the CPU.
> Here's the controller from the Ultrastar. <http://i.imgur.com/Hbv7KrU.jpg>
> It looks like it's got the same 32MB memory chip but it's made by Hynix
> instead of Samsung. It looks like the same LSI chip.
> To me it looks like the only differences might be in the software. Maybe
> they do something like Intel where they test the chips and then assign a
> model number based on how well they do. They just manufacture a bunch of
> identical drives, test them, and the ones that do better get the Ultrastar
> label. The others become Deskstars. The hardware components themselves
> must be pretty close to identical since they have a nearly identical
> failure rate.
> On Mon, Dec 1, 2014 at 11:05 PM, Joe Goldthwaite <joe at goldthwaites.com>
>> Hi Durval,
>> I've attached two files with the output of the smartctl -a command. I
>> put them side by side with winmerge to see the differences. There aren't
>> many. I used the last eight digits of the serial number from the paper
>> drive label as the filename. In the output, that serial number is on the
>> "Firmware Version" line. I don't see anything that differentiates the two
>> disks other than the model name.
>> Joe Goldthwaite.
>> On Mon, Dec 1, 2014 at 4:07 PM, Durval Menezes <durval.menezes at gmail.com>
>>> Hello Joe,
>>> I would be surprised if there aren't any firmware differences between
>>> the two. If you can, please post the output of "smartctl -a" for each drive.
>>> On Dec 1, 2014 8:19 PM, "John Drescher" <drescherjm at gmail.com> wrote:
>>>> > I had ordered the cheaper Deskstar drives for my old ZFS array. I
>>>> > three replacement drives last week and they came in today. I noticed
>>>> > one of them was actually an Ultrastar drive.
>>>> > I have both drives side by side and they look *exactly* the same.
>>>> > specification is identical except for the warranty. The Ultrastar
>>>> has 5
>>>> > years compared to 3 years for the Deskstar.
>>>> > Is this just a marketing gimmick? Do they come of the same
>>>> > line and HGST just charges more for the extra warranty?
>>>> > I'm just curious if anyone has any inside information on this. In the
>>>> > future when they die, I'll probably take them both apart to see if I
>>>> can see
>>>> > any differences in the internals.
>>>> Enterprise drives are supposed to have better components and undergo
>>>> more rigorous testing.
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