Practical file system size question

[Robert Bennett]

Thanks for the quick replies.  It's very nice.

We are using LSI MegaRAID 9280-8E cards.  I got bit by the LSI firmware bug
a while back and chased what appeared to be a memory issue before
discovering that a firmware upgrade solved all my problems.  I don't
remember how many grey hairs were a result of that exercise, but it wasn't
just a few.

We build our own storage from Super Micro Components.

Why not look at 4TB drives?  Short sightedness.  Fear.  Baby Steps.  Take
your pick.  With that being said - I will look into it.

Thanks for all the insights.

-bob

*Bob Bennett*
Director of IT
Crawford Media Services, Inc.
d: 678.536.4906 | e: rbennett at mail.crawford.com | w: www.crawford.com

6 West Druid Hills Drive, NE

Atlanta, GA 30329

view map<http://maps.google.com/maps/ms?ie=UTF8&msa=0&msid=203794978981965716430.00049801625e306a428e2&ll=33.831714,-84.339152&spn=0.001845,0.004289&t=h&z=19&iwloc=00049801625fe86307c32>

*Create ******** **•** Manage ********** **•** Serve*


On Wed, Apr 17, 2013 at 9:53 AM, Joe Landman <joe.landman at gmail.com> wrote:

> On 04/17/2013 09:18 AM, Robert Bennett wrote:
>
> [...]
>
>
>  The question is - does anyone have experience with this type of
>> configuration and in particular with 3TB HDDs and a file system size of
>> 99TB?  The rebuild time with 2TB drives is ~ 24 hours.  Should I expect
>>
>
> Yes, we've built up to 240TB raw (180TB usable) xfs systems for our
> customers on our units.  Very doable, though there are some considerations.
>
> First off, why 3TB when 4TB are in market, pretty stable ... ?  Unless
> there is a budgetary limitation you are working against, I'd advise at
> least looking at those.
>
> Second, which LSI controllers are you using?  Firmware updates for the
> controllers to use 3TB and higher drives are pretty much mandated.  Our
> experience with various LSI cards has ranged from not so good to pretty
> good, and this is a firmware version revision dependent (along with driver)
> issue from what we found.
>
>
>  the rebuild time for the 3TB drives to be ~ 36 hours?
>>
>
> Not in our experience.  Typically 5-10 hours depending upon RAID card
> used, RAID configuration, drives chosen, and other issues.  Its pretty
> complex, and hard to predict in advance without trying it.
>
>
> --
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics, Inc.
> email: landman at scalableinformatics.**com <landman at scalableinformatics.com>
> web  : http://scalableinformatics.com
>        http://scalableinformatics.**com/siflash<http://scalableinformatics.com/siflash>
> phone: +1 734 786 8423 x121
> fax  : +1 866 888 3112
> cell : +1 734 612 4615
>
> ______________________________**_________________
> xfs mailing list
> xfs at oss.sgi.com
> http://oss.sgi.com/mailman/**listinfo/xfs<http://oss.sgi.com/mailman/listinfo/xfs>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://oss.sgi.com/pipermail/xfs/attachments/20130417/0491b9b0/attachment.html>