Date: Thu, 9 Oct 2014 19:03:05 -0700 From: Stephan Wehner <stephanwehner@gmail.com> To: freebsd-fs@freebsd.org Subject: fsck / GEOM / Editing files in mirror partitions separately Message-ID: <CAHZ4wzbGeH=cSnaPdm8sO3ZQzzwSOyOSGaVamG=GyfPG_D=FUw@mail.gmail.com>
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Hello there,
I have a FreeBSD 10.0-RELEASE-p7 system with system specifics:
$ mount
/dev/mirror/gm0s1a on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
/dev/mirror/gm0s1b on /home (ufs, local, journaled soft-updates)
procfs on /proc (procfs, local)
$ gmirror status
Name Status Components
mirror/gm0 COMPLETE ada0 (ACTIVE)
ada1 (ACTIVE)
$ gpart show
=> 63 3907029104 mirror/gm0 MBR (1.8T)
63 3907029042 1 freebsd [active] (1.8T)
3907029105 62 - free - (31K)
=> 0 3907029042 mirror/gm0s1 BSD (1.8T)
0 2456848384 1 freebsd-ufs (1.1T)
2456848384 1433600000 2 freebsd-ufs (684G)
3890448384 16580658 4 freebsd-swap (7.9G)
Computer was rebooted by simply turning it off. On reboot, I got
message "error aborting boot enter full pathname or shell or return
for /bin/sh"
First question: Is it normal that the filesystem will not survive a
power loss, so that manual intervention is needed?
I thought UFS would be more robust.
Now I did something that may have been a bad idea.
I ran fsck on both partitions of the mirror separately, I think they
were called ad4s1 and ad6s1. For both it reported some problems to
fix, and I did Y until they were declared "CLEAN."
Then I mounted each partition separately, and made the same changes to
a single text file (the file was identical in each partition).
Then rebooted, and now the system is running fine.
Second question. Is that mirror in good shape? Is there a way to test?
Third question. Does one even run fsck on partitions that are then
controlled by geom?
This shows in dmesg:
GEOM_MIRROR: Device mirror/gm0 launched (1/2).
GEOM_MIRROR: Device gm0: rebuilding provider ada0.
GEOM_MIRROR: Device gm0: rebuilding provider ada0 finished.
GEOM_MIRROR: Device mirror/gm0 launched (2/2).
Thanks,
Stephan
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