Remount rootfs read-only
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I am having a very strange error on an embedded ARM board (poky, kernel 2.6.35). I try to remount / read-only because the device sometimes reboots (hardware watchdog) and I want to avoid file system inconsistencies. I did this in the past with another board without problems, but on this particular system doing a "mount -o remount,ro /" results in a "mount: you must specify the filesystem type" which is not an error I would expect, ever.
"mount" is from util-linux-ng 2.17.2 and I also tried util-linux 2.19.1. The root file system was formatted with "mkfs.ext4 /dev/sdg2 -L rootfs -O extent,^large_file". /etc/mtab is linked to /proc/mtab.
Any ideas?
linux mount
migrated from serverfault.com Jul 3 '11 at 9:22
This question came from our site for system and network administrators.
add a comment |
I am having a very strange error on an embedded ARM board (poky, kernel 2.6.35). I try to remount / read-only because the device sometimes reboots (hardware watchdog) and I want to avoid file system inconsistencies. I did this in the past with another board without problems, but on this particular system doing a "mount -o remount,ro /" results in a "mount: you must specify the filesystem type" which is not an error I would expect, ever.
"mount" is from util-linux-ng 2.17.2 and I also tried util-linux 2.19.1. The root file system was formatted with "mkfs.ext4 /dev/sdg2 -L rootfs -O extent,^large_file". /etc/mtab is linked to /proc/mtab.
Any ideas?
linux mount
migrated from serverfault.com Jul 3 '11 at 9:22
This question came from our site for system and network administrators.
add a comment |
I am having a very strange error on an embedded ARM board (poky, kernel 2.6.35). I try to remount / read-only because the device sometimes reboots (hardware watchdog) and I want to avoid file system inconsistencies. I did this in the past with another board without problems, but on this particular system doing a "mount -o remount,ro /" results in a "mount: you must specify the filesystem type" which is not an error I would expect, ever.
"mount" is from util-linux-ng 2.17.2 and I also tried util-linux 2.19.1. The root file system was formatted with "mkfs.ext4 /dev/sdg2 -L rootfs -O extent,^large_file". /etc/mtab is linked to /proc/mtab.
Any ideas?
linux mount
I am having a very strange error on an embedded ARM board (poky, kernel 2.6.35). I try to remount / read-only because the device sometimes reboots (hardware watchdog) and I want to avoid file system inconsistencies. I did this in the past with another board without problems, but on this particular system doing a "mount -o remount,ro /" results in a "mount: you must specify the filesystem type" which is not an error I would expect, ever.
"mount" is from util-linux-ng 2.17.2 and I also tried util-linux 2.19.1. The root file system was formatted with "mkfs.ext4 /dev/sdg2 -L rootfs -O extent,^large_file". /etc/mtab is linked to /proc/mtab.
Any ideas?
linux mount
linux mount
asked Jul 3 '11 at 9:19
Franky
migrated from serverfault.com Jul 3 '11 at 9:22
This question came from our site for system and network administrators.
migrated from serverfault.com Jul 3 '11 at 9:22
This question came from our site for system and network administrators.
add a comment |
add a comment |
1 Answer
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This error message is misleading. Try specifying the full mount command, i.e.
mount -o remount,ro -t $FSTYE $DEVICE /
and you should most likely get "mount: / is busy". Compare http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=154978
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
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1 Answer
1
active
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votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
This error message is misleading. Try specifying the full mount command, i.e.
mount -o remount,ro -t $FSTYE $DEVICE /
and you should most likely get "mount: / is busy". Compare http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=154978
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
add a comment |
This error message is misleading. Try specifying the full mount command, i.e.
mount -o remount,ro -t $FSTYE $DEVICE /
and you should most likely get "mount: / is busy". Compare http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=154978
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
add a comment |
This error message is misleading. Try specifying the full mount command, i.e.
mount -o remount,ro -t $FSTYE $DEVICE /
and you should most likely get "mount: / is busy". Compare http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=154978
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
This error message is misleading. Try specifying the full mount command, i.e.
mount -o remount,ro -t $FSTYE $DEVICE /
and you should most likely get "mount: / is busy". Compare http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=154978
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
answered Jul 3 '11 at 9:39
dseifertdseifert
1034
1034
add a comment |
add a comment |
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