Date: Mon, 29 Mar 2010 00:36:58 -0700 (PDT) From: Simun Mikecin <numisemis@yahoo.com> To: Alexey Tarasov <me@lexasoft.ru> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS raidz and 4k sector disks Message-ID: <641044.19603.qm@web112420.mail.gq1.yahoo.com> In-Reply-To: <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru> References: <DEB8C86C-A672-4E61-B42F-630C26164DED@lexasoft.ru> <honbv1$pm4$1@dough.gmane.org> <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru>
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----- Original Message ---- > From: Alexey Tarasov <me@lexasoft.ru> > To: Ivan Voras <ivoras@freebsd.org>; freebsd-fs@freebsd.org > Sent: Sun, March 28, 2010 3:03:38 PM > Subject: Re: ZFS raidz and 4k sector disks > > According to mailing lists, these drives can't be configured to present 4k > sectors to OS. Emulation jumper only changes first LBA number to 1 to made > WinXP start first partition from 64 sector (63+1). May be fresh firmware > update can solve this problem. I don't think they will ever come with a firmware update like that because WD has major operating systems (like Windows 7) covered. It could be solved by asking the drive what is the size of a sector (such ATA call exists: see http://www.wdc.com/wdproducts/library/WhitePapers/ENG/2579-771430.pdf) and set the sector size of the device (/dev/[a]da*) as needed . That would be a permanent solution for ZFS, UFS, swap or any other consumer of this device.
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