Date: Sat, 3 Jul 2010 11:28:03 -0700 (PDT) From: Bucarr <bucarr@gmail.com> To: freebsd-fs@freebsd.org Subject: Re: zfs on 4k sector disks Message-ID: <29065362.post@talk.nabble.com> In-Reply-To: <e7531071831ef4c088902a8b5fe94dab,4B7FAF99.10308@debank.tv> References: <e7531071831ef4c088902a8b5fe94dab,4B7FAF99.10308@debank.tv>
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I was wondering that as well. So I set up a new FreeBSD8.0 box with a UFS2
disk as my boot disk and two WD 2TB EARS drives ("Advanced Format") for a
zfs data array. I made no attempt to alter the WD drives in any way and
ignored the 512b vs 4096b issues. 'zpool create tank raidz da0 da1' set up
the array in a few seconds and I've copied to/from with no troubles and no
apparent performance issues that I care about. If I had more of the WD
drives lying around, I'd add those to the array and see what gives then.
HTH,
Bucky
mailinglists-19 wrote:
>
> Hello,
>
> I've got 3 1.5TB drives that are using the "Advanced Format" from
> Western Digital, see the link for details:
> http://www.wdc.com/wdproducts/library/WhitePapers/ENG/2579-771430.pdf
> This "Advanced Format" basically means the sectors size on disk is
> changed to 4k in stead of 512k.
>
> I'm wondering if freeBSD 8.0 using ZFS raidz and drives like these will
> work properly, I've seen a lot of articles and postings about partitions
> not being properly aligned with the physical disk layout and suffering
> big performance hits. My question is; should I worry about these issues
> or does ZFS already align the data on a 4k border?
>
> My setup would be 3 * 1.5TB WD drives (WD15EARS) using the whole drive
> for a raidz pool.
>
> Thanks,
> Rob Evers
> ***deze e-mail is gescand door Onlinespamfilter.nl***
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