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Date:      Thu, 4 Apr 2002 16:41:56 -0600
From:      Dan Nelson <dnelson@allantgroup.com>
To:        Kenneth Culver <culverk@alpha.yumyumyum.org>
Cc:        Jud <jud@operamail.com>, george@galis.org, Kevin_Stevens@pursued-with.net, nl3481@wi.rr.com, questions@FreeBSD.ORG
Subject:   Re: EIDE drive performance improvements
Message-ID:  <20020404224156.GA75339@dan.emsphone.com>
In-Reply-To: <20020404172053.J66418-100000@alpha.yumyumyum.org>
References:  <20020404215214.32543.qmail@operamail.com> <20020404172053.J66418-100000@alpha.yumyumyum.org>

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In the last episode (Apr 04), Kenneth Culver said:
> > I had been using the tags option, but stopped because:
> > (1) My FreeBSD installation is now on a RAID array, and it seems
> > that although each of the 2 identical IBM ATA-100 drives in the
> > array is "tag-capable," the array is not; and
> 
> That seems logical.... I wouldn't think you could tag an array.

You should be able to, depending on how the controller presents itself
to the system.  The asr driver looks like a scsi disk to the system,
and can accept 255 tagged commands.  I haven't seen my array go above
60, but it does work.

-- 
	Dan Nelson
	dnelson@allantgroup.com

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