Date: Fri, 23 Dec 2011 20:44:13 +0100 From: Johan Hendriks <joh.hendriks@gmail.com> To: Peter <fbsdq@peterk.org>, FreeBSD <freebsd-questions@freebsd.org> Subject: Re: gpart, modified label does not show up in /dev/gpt. Message-ID: <4EF4DA0D.50706@gmail.com> In-Reply-To: <5ec54f1ba62092b324c06ff2c509d04b.squirrel@pop.pknet.net> References: <4EF4C0E4.7080902@gmail.com> <23e2a89872f6805695ac526665c4d60f.squirrel@pop.pknet.net> <4EF4D164.1050005@gmail.com> <5ec54f1ba62092b324c06ff2c509d04b.squirrel@pop.pknet.net>
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Peter schreef: >> Peter schreef: >>>> Hello all. >>>> >>>> I just installed FreeBSD 9.0 RC2 and upgraded to 9.0 RC3. >>>> >>>> I used the standard GPT disk layout at install. >>>> >>>> Now i want to set labels for my disk, so that i can swap around disks a >>>> little more easy. >>>> So reading through the man page it told me to use gpart modify -i -l >>>> >>>> The layout is as follows: >>>> test# gpart status >>>> Name Status Components >>>> da0p1 OK da0 >>>> da0p2 OK da0 >>>> da0p3 OK da0 >>>> >>>> test# gpart list | grep label >>>> label: (null) >>>> label: (null) >>>> label: (null) >>>> >>>> Now i modified the gpart labels. >>>> >>>> test# gpart modify -i1 -l bootpart da0 >>>> da0p1 modified >>>> test# gpart modify -i2 -l rootpart da0 >>>> da0p2 modified >>>> test# gpart modify -i3 -l swap da0 >>>> da0p3 modified >>>> >>>> Ok all looks fine. >>>> Now lets see if i can use my labels >>>> >>>> test# cd /dev/gpt >>>> /dev/gpt: No such file or directory. >>>> >>>> Well it does not create my labels >>>> I did check if the labels where there >>>> >>>> test# gpart list | grep label >>>> label: bootpart >>>> label: rootpart >>>> label: swap >>>> >>>> So i rebooted the machine! >>>> But after a reboot, still no /dev/gpt. >>>> >>>> So why is it not creating my labels! >>>> Am i missing a step? >>>> >>>> Thanks for your time. >>>> >>>> And before i forget, merry christmas to all, and a wonderful 2012. >>>> >>>> regards, >>>> Johan Hendriks >>>> >>> I was going to say if you mount /dev/da0p? its /dev/gpt/label >>> disappears, >>> and since all the partition are mounted already [/dev/gpt/ is empty], >>> then >>> /dev/gpt is maybe also removed.......but /dev/gpt/bootpart is not >>> mounted >>> and should still show up. >>> >>> >>> When you ran the 'gpart' commands, did you set the sysctl geom debug >>> variable? [sysctl kern.geom.debugflags=17] >>> After the reboot, are the labels still there? [gpart list | grep label] >>> >>> ]Peter[ >>> >> I placed some other disk in (for the zfs pool) >> Now i have /dev/gpt/bootpart, but not the labels for swap and / >> I did not use the sysctl value. >> >> And yes the labels are stil in place. >> >> test# cd /dev/gpt >> test# ls -al >> total 1 >> dr-xr-xr-x 2 root wheel 512 Dec 23 20:02 . >> dr-xr-xr-x 10 root wheel 512 Dec 23 21:02 .. >> crw-r----- 1 root operator 0, 123 Dec 23 20:02 bootpart >> test# gpart list | grep label >> label: bootpart >> label: rootpart >> label: swap >> test# >> >> I will try the debugflag option. >> But it should not be nessacary i guess. >> >> thanks >> regards >> Johan >> > If you have already mounted a /dev/da0p?, its label is removed from > /dev/gpt - 'bootpart' is never mounted, that is why it's label remains. > you just have to change /etc/fstab to the /dev/gpt/labels and then they > will remain and get mounted - Or boot from a DVD, don't mount anything and > you'll see the labels. > > ie: > If you mount '/dev/da0p2'as '/' then '/dev/gpt/rootpart' will no longer be > available, same goes for swap and everything else. If you mount > 'dev/gpt/rootpart' as '/', the you'll have both '/dev/da0p2' and > '/dev/gpt/bootpart' > > ]Peter[ > > Thanks that solved it. !! because i did not see them in /dev/gpt i did not change the /etc/fstab file to the appropiate config. I thought if they are not there, then i can not use them. Wrong assumption !!! I edited /etc/fstab to mount /dev/gpt/rootpart on / and /dev/gpt/swap on swap, and the machine booted like it should. Also the gpt entries are now there! Thanks again! Merry cristmas !!! regards Johan
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