From owner-freebsd-scsi  Tue Feb  9 04:15:36 1999
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Date: Tue, 9 Feb 1999 19:56:26 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199902090856.TAA16269@godzilla.zeta.org.au>
To: dwmalone@maths.tcd.ie, freebsd-scsi@FreeBSD.ORG
Subject: Re: Long vmcore dumps.
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>Sorry - confused about the units for delay - that patch doesn't
>help in the least! Does anyone know what is slowing it? The ide
>dump code seems to go much faster even on quite old disks....

The IDE dump code normally writes 127.5K at a time.  The SCSI dump
code normally writes PAGE_SIZE (4K on i386's) at a time.  Some
drives are challenged by small synchronous i/o's.

Bruce

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