Date: Mon, 7 Sep 2009 11:53:27 GMT From: pjd@FreeBSD.org To: weldon@excelsusphoto.com, pjd@FreeBSD.org, freebsd-fs@FreeBSD.org, pjd@FreeBSD.org Subject: Re: kern/138244: [zfs] dd(1) attempts bitwise transfer onto ZFS pool Message-ID: <200909071153.n87BrRPc066070@freefall.freebsd.org>
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Synopsis: [zfs] dd(1) attempts bitwise transfer onto ZFS pool State-Changed-From-To: open->feedback State-Changed-By: pjd State-Changed-When: pon 7 wrz 2009 11:46:04 UTC State-Changed-Why: I'm sorry, but I don't really understand what you described. What do you mean by 'bitwise transfer'? Writing to raw block device like /dev/da0? What do you mean by zvolume? I think you mean raw device used as pool component, but in ZFS terminology zvolume (ZVOL) is something different. What do you mean by 'bit level copying onto a zpool'? zpool is not a block device. Do you mean copying to /pool/ directory or block device which is pool component? Could you show example commands you were trying to use, your pool configuration, etc.? If you ment to do something like 'dd if=/dev/zero of=/dev/da0' where da0 is pool component (a vdev in ZFS terminology) then it should be denied by GEOM, as da0 should be already opened for writing by ZFS and dd(1) shouldn't be able to open it for writing at all. Responsible-Changed-From-To: freebsd-fs->pjd Responsible-Changed-By: pjd Responsible-Changed-When: pon 7 wrz 2009 11:46:04 UTC Responsible-Changed-Why: I'll take this one. http://www.freebsd.org/cgi/query-pr.cgi?pr=138244
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