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From: Thiago Damas <tdamas@gmail.com>
Date: Thu, 18 Mar 2010 15:46:31 -0300
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To: Matthew Dillon <dillon@apollo.backplane.com>
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Subject: Re: ATA 4K sector issues
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  I tested now with 1Mb (2048 blocks) at the begining of disk, and same
behaviour: slow write speed and high disk latency.


On Wed, Mar 17, 2010 at 6:17 PM, Thiago Damas <tdamas@gmail.com> wrote:

>   I'll try tomorrow more zfs tests, with 1M alignment on begining of disk.
>   But I also remember that zfs block size its 128k, but metadata can be of
> dynamic size. And we can use compressed files too.
>   There is a sysctl, md_compress, that I turned out in my tests, but not
> working as expected.
>   Why using gnop -S 4096 works well?
>
> Thiago
>
>