Date: Fri, 12 Feb 1999 09:02:18 -0700 (MST) From: "Kenneth D. Merry" <ken@plutotech.com> To: mjacob@feral.com Cc: ANDREAS.KLEMM.AK@bayer-ag.de, scsi@FreeBSD.ORG Subject: Re: It%s not the write cache on 3.0-STABLE and not tagged comma Message-ID: <199902121602.JAA34641@panzer.plutotech.com> In-Reply-To: <Pine.LNX.4.04.9902120557340.17711-100000@feral-gw> from Matthew Jacob at "Feb 12, 1999 5:57:40 am"
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Matthew Jacob wrote... > > What was the problem? He is getting poor performance for sequential writes with a Seagate disk under CAM. Write throughput to the disk is fairly erratic. (i.e., lots of ups and downs) He has the problem under 2.2.7 with tagged queueing enabled, but not when he disables tagged queueing. The problem occurs under 3.0 with or without tagged queueing. I told him to disable write caching, since I have seen similar problems when write caching is enabled, but that didn't seem to fix the problem. Any ideas? Ken -- Kenneth Merry ken@plutotech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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