I sent the below question a month ago, but received no answer. Therefore, I resend it in the hope of getting one now.
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I'm considering turning on Tagged Command Queuing in my ATA system. My
disks are all Hitachi 7K250 (two HDS722512VLAT80 and one
HDS722516VLAT80) which according to Hitachi support this feature (queue
depth = 32).
However, I read in
http://lists.freebsd.org/pipermail/freebsd-current/2003-July/007378.html
that there may be problems doing this and not really improving performance.
Is that recommendation still valid or should I go for it?
My uname:
[homebell] ~> uname -a
FreeBSD homebell.dyndns.org 4.10-RELEASE-p2 FreeBSD 4.10-RELEASE-p2 #0:
Mon Oct 18 21:48:34 CEST 2004
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/HOMEBELLapmipfw i386
-- Kjell
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Iread some where FreeBSD only supported ibm drives for that, but then all support was throuwn out because nobody used it. If you want performance try a NCQ SATA II drive. If you only have ATA TCQ then get a raptor for max performance. If it is a desktop then leave it off, TCQ is a server feature and slows down normal desktop workloads. www.storagereview.com
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