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Date: Fri, 21 Nov 2008 10:45:00 +0200
From: "Valentin Bud" <valentin.bud@gmail.com>
To: "Wojciech Puchar" <wojtek@wojtek.tensor.gdynia.pl>
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Cc: questions@freebsd.org, Marcel Grandemange <thavinci@thavinci.za.net>,
	Tsu-Fan Cheng <tfcheng@gmail.com>
Subject: Re: ZFS Recovery Tools
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On Fri, Nov 21, 2008 at 10:42 AM, Wojciech Puchar
<wojtek@wojtek.tensor.gdynia.pl> wrote:
>> What does MAXPHYS mean (yes max raw I/O transfer) and do? A little
>> bit more specific if you may.
>
> how large can be single read from disk.
>
> when you say read 2 files in the same time, FreeBSD will readahead at most
> MAXPHYS from one file, then from file 2, from file 1 etc.
>
> 128kB/s is way too much for todays drives, that can read 1MB within one
> access time.
>
Thank you for your explanation.

a great day,
v