block device is write-protected, mounting read-only
Que: Not able to write data in the File system. This file system is in VCS and
while mounting the FS manually giving following error.
block device /dev/mapper/XXXXXXXXXXX is write-protected, mounting read-only
Ans:
To rectify the issue we followed following steps.
This FS is under LVM. As it is in VCS, Once you offline the VG/FS related resources, it'll export the related VG as-well.
Hence Offline the Mount resource Only to minimize the activity. For our case we had only one FS, hence to play it safe
we offlined the VG resource as well. Hence we have followed below steps to rectify the issue.
Import the VG:
vgimport testvg
Activate the VG:
vgchange -ay testvg
FSCK the File system and fix the inode related errors.
fsck.ext3 /dev/testvg/testlv
FSCK the File system again for couple of times.
fsck.ext3 /dev/testvg/testlv
fsck.ext3 /dev/testvg/testlv
Mount the File system:
mount -t ext3 /dev/mapper/testvg-testlv /mountpoint
Create and delete the test files to check if the FS is RW or RO.
touch test
rm test
Once test is completed , Unmount the FS and export the VG.
umount /mountpoint
vgexport testvg
Start the resouce through VCS and all should be fine now.
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