Date: Wed, 12 May 2010 09:09:33 -0500 From: Adam Vande More <amvandemore@gmail.com> To: "A. Wright" <andrew@qemg.org> Cc: freebsd-questions@freebsd.org Subject: Re: Long I/O pauses on same mass storage Message-ID: <AANLkTimgROnG_VSXSBGKWciyFpmObTCXfXsqXWbrFv_i@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1005121035480.64303@qemg.org> References: <alpine.BSF.2.00.1005121035480.64303@qemg.org>
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On Wed, May 12, 2010 at 8:46 AM, A. Wright <andrew@qemg.org> wrote: > > I have recently upgraded my system to 8.0, and in the > course of doing so, have migrated most filesystems > onto a new drive. > Did you dd it across? If so, that's kind of a no-no in some situtation as the boundries won't be aligned resulting in slow disk. You should use a different tool like dump/restore. > > This seems to most commonly happen when both reading > and writing tasks are active -- I am unsure whether reads writes must be in > the same partition, or whether > two partitions on the same drive are sufficient. > If this is one of them "eco" drives, you may wish to investigate things like firmware updates etc. You can also try using achi, it has quite a benefits including speed. Make sure to read up on it first. -- Adam Vande More
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