Couple months, nope. I guess there is this DOS utility provided by WD that 
allows you change TLER settings
having TLER disabled can be problem, faulty disks timeout randomly and zfs 
doesn't always want to mark them as failed, sometimes it does though.

Yours
Markus Kovero

-----Original Message-----
From: Tristan Ball [mailto:tristan.b...@leica-microsystems.com] 
Sent: 11. syyskuuta 2009 10:04
To: Markus Kovero; zfs-discuss@opensolaris.org
Subject: RE: [zfs-discuss] alternative hardware configurations for zfs

How long have you had them in production?

Were you able to adjust the TLER settings from within solaris?

Thanks,
        Tristan.

-----Original Message-----
From: zfs-discuss-boun...@opensolaris.org
[mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Markus Kovero
Sent: Friday, 11 September 2009 5:00 PM
To: Eugen Leitl; Eric Sproul; zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] alternative hardware configurations for zfs

We've been using caviar black 1TB with disk configurations consisting 64
disks or more. They are working just fine.

Yours
Markus Kovero

-----Original Message-----
From: zfs-discuss-boun...@opensolaris.org
[mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Eugen Leitl
Sent: 11. syyskuuta 2009 9:51
To: Eric Sproul; zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] alternative hardware configurations for zfs

On Thu, Sep 10, 2009 at 01:11:49PM -0400, Eric Sproul wrote:

> I would not use the Caviar Black drives, regardless of TLER settings.
The RE3
> or RE4 drives would be a better choice, since they also have better
vibration
> tolerance.  This will be a significant factor in a chassis with 20
spinning drives.

Yes, I'm aware of the issue, and am using 16x RE4 drives in my current 
box right now (which I unfortunately had to convert to CentOS 5.3 for
Oracle/
custom software compatibility reasons). I've made very bad experiences
with Seagate 7200.11 in RAID in the past.

Thanks for your advice against Caviar Black. 
 
> > Do you think above is a sensible choice? 
> 
> All your other choices seem good.  I've used a lot of Supermicro gear
with good
> results.  The very leading-edge hardware is sometimes not supported,
but

I've been using
http://www.supermicro.com/products/motherboard/QPI/5500/X8DAi.cfm
in above box.

> anything that's been out for a while should work fine.  I presume
you're going
> for an Intel Xeon solution-- the peripherals on those boards a a bit
better
> supported than the AMD stuff, but even the AMD boards work well.

Yes, dual-socket quadcore Xeon.

-- 
Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org
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