Date: Mon, 29 Jan 2007 06:48:29 -0800 (PST) From: "R. B. Riddick" <arne_woerner@yahoo.com> To: Hansa <mythtv@logic-q.nl>, freebsd geom <freebsd-geom@FreeBSD.ORG> Subject: RE: How do I gmirror slices? Message-ID: <901910.12288.qm@web30302.mail.mud.yahoo.com> In-Reply-To: <LHEFLGAENILPPDJIHADOGEJFCFAA.mythtv@logic-q.nl>
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--- Hansa <mythtv@logic-q.nl> wrote: > Ok. One question pops into mind. I'm transfering / which includes my kernel, > to a new disk (probably with a different setup). this means the kernel file > could be written to a different sector. So I have to tell the bootmgr where > it is located. Don't I? > Hmm... I dont think so... There is the first sector of the disk, that is read by the BIOS, then there are 8KB somewhere at a fixed position outside the file system... And I think those 8KB are already able to understand/read UFS... :-) > > > 2. # gmirror label -v -b round-robin gm0 /dev/ad6s1 > > > # gmirror label -v -b round-robin gm0 /dev/ad6s2 > > looks good > Except for the 2nd command. It should be gm1 instead of gm0. > Oh yes... U r right... > I presume gstripe and gconcat like gmirror are using similar ways to store > metadata? > Yup > Which of those is the better choice? > Depends... gstripe has better performance, if it can issue requests for all disks... But gconcat can use the full space of disks of non-equal size (minus one sector per disk for meta data of course)... -Arne ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html
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