[SOLVED] Re: labelling root file system (RELENG_8)
avg at FreeBSD.org
Wed Jun 8 16:40:08 UTC 2011
on 08/06/2011 19:26 Jeremy Chadwick said the following:
> I have the exact same question except not with regards to labels but
> toggling TRIM capability on the root filesystem.
> - Start system
> - At loader, boot single-user (option 4)
> - At prompt choose /bin/sh
> - mount -a
I think that this is a culprit.
> - tunefs -t enable /dev/ada0s1a --- fails
Shouldn't you have / mounted r/o here?
BTW, AFAIR, *re*-mounting root read-only won't help; it needs to have never been
> - sysctl kern.geom.debugflags=16
> - tunefs -t enable /dev/ada0s1a --- works
> - tunefs -p /dev/ada0s1a -- shows TRIM enabled
> - reboot
I think that at this step your superblock on disk gets re-written with its copy in
memory which has never been updated. But not sure.
> - Boot into single-user, multi-user, whatever
> - tunefs -p /dev/ada0s1a -- shows TRIM disabled
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