Date: Wed, 17 Mar 2010 14:34:07 -0300 From: Thiago Damas <tdamas@gmail.com> To: Mohacsi Janos <mohacsi@niif.hu> Cc: =?ISO-8859-1?Q?Dag=2DErling_Sm=F8rgrav?= <des@des.no>, freebsd-hackers@freebsd.org Subject: Re: ATA 4K sector issues Message-ID: <f8e3d83f1003171034m5e75eae4r5e8b31d88d361d3b@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1003171652260.74067@mignon.ki.iif.hu> References: <alpine.BSF.2.00.1003171114280.74067@mignon.ki.iif.hu> <86tysf58a2.fsf@ds4.des.no> <alpine.BSF.2.00.1003171652260.74067@mignon.ki.iif.hu>
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I had problem with ZFS.
With gnop -S 4096, it works well on /dev/ad{a}X.nop; but I decided to not
use those disks.
2010/3/17 Mohacsi Janos <mohacsi@niif.hu>
>
>
>
> On Wed, 17 Mar 2010, Dag-Erling Sm?rgrav wrote:
>
> Mohacsi Janos <mohacsi@niif.hu> writes:
>>
>>> What is the situation with ATA 4K dirves in FreeBSD? Are there
>>> any support for them in fdisk or disklabel?
>>>
>>
>> Hmm, didn't we discuss this already? All we need to do is change the
>> defaults in fdisk so it rounds partition offsets and sizes to a multiple
>> of 8 sectors (or 16 for future-proofing) instead of aligning them with
>> fictitious cylinder boundaries. Bsdlabel, as disklabel is properly
>> known, already DTRT: by default, the first partition starts at offset
>> 16. Just make sure you specify sizes that are divisible by 8 or 16
>> blocks (not an issue if you use the M or G suffixes). Sysinstall
>> operates in megabytes.
>>
>
> Thanks for the information.
>
>
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