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Date:      Tue, 15 Jul 2008 23:34:11 -0400
From:      Steve Bertrand <steve@ibctech.ca>
To:        Andrew Snow <andrew@modulus.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: taskqueue timeout
Message-ID:  <487D6C33.2060409@ibctech.ca>
In-Reply-To: <487D4A2A.9010508@modulus.org>
References:  <487CCD46.8080506@ibctech.ca>	<200807151711.m6FHBgVO007481@apollo.backplane.com> <487D4A2A.9010508@modulus.org>

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Andrew Snow wrote:

>  From Western Digital's line of "enterprise" drives:
> 
> "RAID-specific time-limited error recovery (TLER) - Pioneered by WD, 
> this feature prevents drive fallout caused by the extended hard drive 
> error-recovery processes common to desktop drives."

> Therefore I think the FreeBSD timeout should also be set to 8 seconds 
> instead of 5 seconds.  Desktop-targetted drives will not respond for 
> over 10 seconds, up to minutes, so its not worth setting the FreeBSD 
> timeout any higher.

Interesting you say this. To reiterate, I have /boot on USB thumb drive, 
and the system is mounted from / on a raidz pool called /storage via 
loader.conf.

The four drives in question (per the packaging) are:

- Western Digital Caviar SE16 500GB
- 7200, 16MB, SATA-300, OEM

Per the packaging on the rest of the hardware:

# mobo
- XFX 610i, 7050 GeForce (I *never* use graphics on my FreeBSD boxen, I 
*only* know/have CLI with no 'windows')

# memory
- 2 GB Corsair XMS2 Twin2X 6400C4 memory

# cpu
- Intel Pentium DC E2200 2.20GHz OEM
- 2.20 GHz, 1MB Cache, 800MHz FSB, Allendale, Dual Core, OEM, Socket 
775, Processor

# swap
- I don't run any, but can/will add in an IDE/ATA 7200 200GB in the 
event this problem may be related to ZFS/RAM issues.

Steve



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