ATA Tagged Queuing?

Kjell B. homebell at
Sun Feb 6 02:03:29 PST 2005

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
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 4.10-RELEASE-p2 FreeBSD 4.10-RELEASE-p2 #0:
Mon Oct 18 21:48:34 CEST 2004
homebell at  i386


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