Status of support for 4KB disk sectors

[Kevin Oberman]

On Tue, Jul 19, 2011 at 2:49 PM, Jeremy Chadwick
<freebsd at jdc.parodius.com> wrote:
> On Tue, Jul 19, 2011 at 02:33:27PM -0700, Kevin Oberman wrote:
>> On Tue, Jul 19, 2011 at 1:41 PM, Alexander Leidinger
>> <Alexander at leidinger.net> wrote:
>> > On Mon, 18 Jul 2011 16:41:24 -0700 Jeremy Chadwick
>> > <freebsd at jdc.parodius.com> wrote:
>> >
>> >> But the currently "known method" is to use gnop(8). ?Here's an
>> >> example:
>> >>
>> >> http://www.leidinger.net/blog/2011/05/03/another-root-on-zfs-howto-optimized-for-4k-sector-drives/
>> >>
>> >> Now, that's for ZFS, but I'm under the impression the exact same is
>> >> needed for FFS/UFS.
>> >
>> > Info: gnop will not work for FFS/UFS because gnop is a temporary
>> > solution (needs to be done by hand at each reboot). For FFS/UFS you
>> > need to align the slice/partition and chose a good blocksize/fragsize
>> > combination (e.g. 32k/4k).
>> >
>> > Bye,
>> > Alexander.
>> >
>> > --
>> > http://www.Leidinger.net ? ?Alexander @ Leidinger.net: PGP ID = B0063FE7
>> > http://www.FreeBSD.org ? ? ? netchild @ FreeBSD.org ?: PGP ID = 72077137
>> >
>>
>> Thanks, Alexander.
>>
>> This is what I had expected after reading the man pages, though I
>> would think -b 65560 -f 8192' would be a bit more reasonable in this
>              ^^^^^^^^
>              ^^^^^^^^

> Where did this number come from?  Did you mean 65536?  65560 would not
> be properly aligned.

Ack! Fingers and brain out of sync. Yes, 65536 is what I meant.

>> day of bloated file formats. it's been years since I have hit a
>> problem with lack of inodes. Probably around 1993 on an old
>> SparcStation 1 running SunOS and then only due to a bad assumption I
>> made when 'newfs'ing it.
>>
>> Again, thanks for the advice. At very least it will save me a bit of time!
>
> Agreed -- thanks for the advice, Alexander.
>
> --
> | Jeremy Chadwick                                jdc at parodius.com |
> | Parodius Networking                       http://www.parodius.com/ |
> | UNIX Systems Administrator                   Mountain View, CA, US |
> | Making life hard for others since 1977.               PGP 4BD6C0CB |
>
>



-- 
R. Kevin Oberman, Network Engineer - Retired
E-mail: kob6558 at gmail.com