Date: Sun, 28 Mar 2010 17:03:38 +0400 From: Alexey Tarasov <me@lexasoft.ru> To: Ivan Voras <ivoras@freebsd.org>, freebsd-fs@freebsd.org Subject: Re: ZFS raidz and 4k sector disks Message-ID: <492FB7C5-1B48-46BA-B63F-E7CBF7A0A195@lexasoft.ru> In-Reply-To: <honbv1$pm4$1@dough.gmane.org> References: <DEB8C86C-A672-4E61-B42F-630C26164DED@lexasoft.ru> <honbv1$pm4$1@dough.gmane.org>
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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. On 28.03.2010, at 14:44, Ivan Voras wrote: > AFAIK (I don't have actual experience with them) current 4k drives = emulate 512b drives and have a performance penalty in the above = scenario. Because of this emulation, ZFS doesn't know you have a 4k = drive. If you can, try disabling this emulation and make it present to = the operating system as a true 4k drive. Of course, this will make the = data on it unreadable - you will have to reformat it, and the drive will = be unbootable. >=20 > Good luck and report what you find. >=20 > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" -- Alexey Tarasov (\__/)=20 (=3D'.'=3D)=20 E[: | | | | :]=D0=97=20 (")_(")
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