resize regular luks partition
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localhost ~ # resize2fs /dev/sdb1
resize2fs 1.43.1 (08-Jun-2016)
resize2fs: Device or resource busy while trying to open /dev/sdb1
Couldn't find valid filesystem superblock.
localhost ~ # resize2fs /dev/mapper/vol1
resize2fs 1.43.1 (08-Jun-2016)
Please run 'e2fsck -f /dev/mapper/vol1' first.
localhost ~ # e2fsck -f /dev/mapper/vol1
e2fsck 1.43.1 (08-Jun-2016)
Pass 1: Checking inodes, blocks, and sizes
Inode 18612229 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612260 extent tree (at level 1) could be narrower. Fix<y>? yes
Inode 18612799 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612835 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612860 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612861 extent tree (at level 1) could be narrower. Fix<y>? yes
Inode 18612864 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612865 extent tree (at level 2) could be narrower. Fix<y>? yes
Inode 18612866 extent tree (at level 1) could be narrower. Fix<y>? yes
Inode 18612879 extent tree (at level 1) could be narrower. Fix ('a' enables 'yes' to all) <y>? yes
Inode 18612915 extent tree (at level 1) could be narrower. Fix ('a' enables 'yes' to all) <y>? yes
Inode 18613562 extent tree (at level 2) could be narrower. Fix ('a' enables 'yes' to all) <y>? yes to all
Inode 18613565 extent tree (at level 1) could be narrower. Fix? yes
Pass 1E: Optimizing extent trees
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/mapper/vol1: ***** FILE SYSTEM WAS MODIFIED *****
/dev/mapper/vol1: 352906/45793280 files (0.3% non-contiguous), 160544229/183142878 blocks
localhost ~ # resize2fs /dev/mapper/vol1
resize2fs 1.43.1 (08-Jun-2016)
Resizing the filesystem on /dev/mapper/vol1 to 244139857 (4k) blocks.
The filesystem on /dev/mapper/vol1 is now 244139857 (4k) blocks long.
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