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Date: Tue, 2 Aug 2011 02:43:20 +0900 (JST)
From: Round Robinjp <roundrobinjp@...oo.co.jp>
To: Goldstein Amir <amir73il@...il.com>
Cc: Andreas Dilger <aedilger@...il.com>, Ted Ts'o <tytso@....edu>,
"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: Re: flashing large eMMC partitions with ext4
> I meant using a newer version of resize2fs (which you do not have),
I have now corrected this and other mistakes.
But when I mount the image after finally extending
to 4G, the df still shows the size as 1G.
Am I still doing something wrong?
Full log below:
-----------------------------------------
-----------------------------------------
-----------------------------------------
$ dd if=/dev/zero of=a.img bs=4K count=256K
262144+0 records in
262144+0 records out
1073741824 bytes (1.1 GB) copied, 4.09006 s, 263 MB/s
$ mkfs.ext4 -O ^has_journal,flex_bg -G 32 -E resize=4G a.img
mke2fs 1.42-WIP (02-Jul-2011)
a.img is not a block special device.
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
65536 inodes, 262144 blocks
13107 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=268435456
8 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376
Allocating group tables: done
Writing inode tables: done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 0 mounts or
0 days, whichever comes first. Use tune2fs -c or -i to override.
$ sudo mount -t ext4 -o loop a.img /mnt/
$ du -sh /usr/src/
92M /usr/src/
$ cp -a /usr/src/* /mnt/
$ e2fsck -f a.img
e2fsck 1.42-WIP (02-Jul-2011)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong (242859, counted=237788).
Fix<y>? yes
Free inodes count wrong (55821, counted=52249).
Fix<y>? yes
a.img: ***** FILE SYSTEM WAS MODIFIED *****
a.img: 13287/65536 files (0.0% non-contiguous), 24356/262144 blocks
$ resize2fs a.img 4G
resize2fs 1.42-WIP (02-Jul-2011)
Please run 'e2fsck -f a.img' first.
$ e2fsck -f a.img
e2fsck 1.42-WIP (02-Jul-2011)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
a.img: 20864/65536 files (0.0% non-contiguous), 27067/262144 blocks
$ resize2fs a.img 4G
resize2fs 1.42-WIP (02-Jul-2011)
Resizing the filesystem on a.img to 1048576 (4k) blocks.
The filesystem on a.img is now 1048576 blocks long.
$ sudo tune2fs -O has_journal /dev/loop0
tune2fs 1.42-WIP (02-Jul-2011)
Creating journal inode: done
This filesystem will be automatically checked every 20 mounts or
0 days, whichever comes first. Use tune2fs -c or -i to override.
$ sudo umount /mnt
$ dumpe2fs a.img
dumpe2fs 1.42-WIP (02-Jul-2011)
Filesystem volume name: <none>
Last mounted on: /mnt
Filesystem UUID: 4f2361c3-2755-4a6a-bf28-dd7e1a4dd772
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 65536
Block count: 262144
Reserved block count: 13107
Free blocks: 226191
Free inodes: 44671
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 63
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 32
Filesystem created: Tue Aug 2 02:29:45 2011
Last mount time: Tue Aug 2 02:29:50 2011
Last write time: Tue Aug 2 02:31:01 2011
Mount count: 1
Maximum mount count: 20
Last checked: Tue Aug 2 02:29:45 2011
Check interval: 0 (<none>)
Lifetime writes: 406 kB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 20500
Default directory hash: half_md4
Directory Hash Seed: a42d0c4e-0207-4fd4-94e7-b71bc107ae90
Journal features: (none)
Journal size: 32M
Journal length: 8192
Journal sequence: 0x00000001
Journal start: 0
Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
Checksum 0x3fe2, unused inodes 0
Primary superblock at 0, Group descriptors at 1-1
Reserved GDT blocks at 2-64
Block bitmap at 65 (+65), Inode bitmap at 97 (+97)
Inode table at 129-640 (+129)
24746 free blocks, 0 free inodes, 3 directories
Free blocks: 20358-32767
Free inodes:
Group 1: (Blocks 32768-65535) [ITABLE_ZEROED]
Checksum 0x1361, unused inodes 0
Backup superblock at 32768, Group descriptors at 32769-32769
Reserved GDT blocks at 32770-32832
Block bitmap at 66 (bg #0 + 66), Inode bitmap at 98 (bg #0 + 98)
Inode table at 641-1152 (bg #0 + 641)
9128 free blocks, 0 free inodes, 975 directories
Free blocks: 49152-57343, 60376-60383, 60512-61439
Free inodes:
Group 2: (Blocks 65536-98303) [ITABLE_ZEROED]
Checksum 0x3bb7, unused inodes 4076
Block bitmap at 67 (bg #0 + 67), Inode bitmap at 99 (bg #0 + 99)
Inode table at 1153-1664 (bg #0 + 1153)
28672 free blocks, 4076 free inodes, 2302 directories, 4076 unused inodes
Free blocks: 69632-98303
Free inodes: 20501-24576
Group 3: (Blocks 98304-131071) [ITABLE_ZEROED]
Checksum 0x372b, unused inodes 7865
Backup superblock at 98304, Group descriptors at 98305-98305
Reserved GDT blocks at 98306-98368
Block bitmap at 68 (bg #0 + 68), Inode bitmap at 100 (bg #0 + 100)
Inode table at 1665-2176 (bg #0 + 1665)
32703 free blocks, 7865 free inodes, 327 directories, 7865 unused inodes
Free blocks: 98369-131071
Free inodes: 24904-32768
Group 4: (Blocks 131072-163839) [ITABLE_ZEROED]
Checksum 0x4c7a, unused inodes 8154
Block bitmap at 69 (bg #0 + 69), Inode bitmap at 101 (bg #0 + 101)
Inode table at 2177-2688 (bg #0 + 2177)
32768 free blocks, 8154 free inodes, 38 directories, 8154 unused inodes
Free blocks: 131072-163839
Free inodes: 32807-40960
Group 5: (Blocks 163840-196607) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xbd51, unused inodes 8192
Backup superblock at 163840, Group descriptors at 163841-163841
Reserved GDT blocks at 163842-163904
Block bitmap at 70 (bg #0 + 70), Inode bitmap at 102 (bg #0 + 102)
Inode table at 2689-3200 (bg #0 + 2689)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 163905-196607
Free inodes: 40961-49152
Group 6: (Blocks 196608-229375) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
Checksum 0xf453, unused inodes 8192
Block bitmap at 71 (bg #0 + 71), Inode bitmap at 103 (bg #0 + 103)
Inode table at 3201-3712 (bg #0 + 3201)
32768 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 196608-229375
Free inodes: 49153-57344
Group 7: (Blocks 229376-262143) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xfcc2, unused inodes 8192
Backup superblock at 229376, Group descriptors at 229377-229377
Reserved GDT blocks at 229378-229440
Block bitmap at 72 (bg #0 + 72), Inode bitmap at 104 (bg #0 + 104)
Inode table at 3713-4224 (bg #0 + 3713)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 229441-262143
Free inodes: 57345-65536
$ truncate -s 1G a.img
$ e2fsck -f a.img
e2fsck 1.42-WIP (02-Jul-2011)
Backing up journal inode block information.
Moving journal from /.journal to hidden inode.
Pass 1: Checking inodes, blocks, and sizes
Inode 7 has illegal block(s). Clear<y>? yes
Illegal block #2064 (294914) in inode 7. CLEARED.
Illegal block #2065 (819202) in inode 7. CLEARED.
Illegal block #2066 (884738) in inode 7. CLEARED.
Illegal block #3088 (294915) in inode 7. CLEARED.
Illegal block #3089 (819203) in inode 7. CLEARED.
Illegal block #3090 (884739) in inode 7. CLEARED.
Illegal block #4112 (294916) in inode 7. CLEARED.
Illegal block #4113 (819204) in inode 7. CLEARED.
Illegal block #4114 (884740) in inode 7. CLEARED.
Illegal block #5136 (294917) in inode 7. CLEARED.
Illegal block #5137 (819205) in inode 7. CLEARED.
Too many illegal blocks in inode 7.
Clear inode<y>? yes
Restarting e2fsck from the beginning...
Resize inode not valid. Recreate<y>? yes
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(8022--20357)
Fix<y>? yes
Free blocks count wrong for group #0 (24745, counted=24746).
Fix<y>? yes
Free blocks count wrong (226190, counted=226191).
Fix<y>? yes
a.img: ***** FILE SYSTEM WAS MODIFIED *****
a.img: 20864/65536 files (0.0% non-contiguous), 35953/262144 blocks
$
$ dumpe2fs a.img
dumpe2fs 1.42-WIP (02-Jul-2011)
Filesystem volume name: <none>
Last mounted on: /mnt
Filesystem UUID: 4f2361c3-2755-4a6a-bf28-dd7e1a4dd772
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 65536
Block count: 262144
Reserved block count: 13107
Free blocks: 226191
Free inodes: 44672
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 63
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 32
Filesystem created: Tue Aug 2 02:29:45 2011
Last mount time: Tue Aug 2 02:29:50 2011
Last write time: Tue Aug 2 02:32:29 2011
Mount count: 0
Maximum mount count: 20
Last checked: Tue Aug 2 02:32:29 2011
Check interval: 0 (<none>)
Lifetime writes: 742 kB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: a42d0c4e-0207-4fd4-94e7-b71bc107ae90
Journal backup: inode blocks
Journal features: (none)
Journal size: 32M
Journal length: 8192
Journal sequence: 0x00000001
Journal start: 0
Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
Checksum 0x3fe2, unused inodes 0
Primary superblock at 0, Group descriptors at 1-1
Reserved GDT blocks at 2-64
Block bitmap at 65 (+65), Inode bitmap at 97 (+97)
Inode table at 129-640 (+129)
24746 free blocks, 0 free inodes, 3 directories
Free blocks: 8022-32767
Free inodes:
Group 1: (Blocks 32768-65535) [ITABLE_ZEROED]
Checksum 0x1361, unused inodes 0
Backup superblock at 32768, Group descriptors at 32769-32769
Reserved GDT blocks at 32770-32832
Block bitmap at 66 (bg #0 + 66), Inode bitmap at 98 (bg #0 + 98)
Inode table at 641-1152 (bg #0 + 641)
9128 free blocks, 0 free inodes, 975 directories
Free blocks: 49152-57343, 60376-60383, 60512-61439
Free inodes:
Group 2: (Blocks 65536-98303) [ITABLE_ZEROED]
Checksum 0x3b77, unused inodes 4077
Block bitmap at 67 (bg #0 + 67), Inode bitmap at 99 (bg #0 + 99)
Inode table at 1153-1664 (bg #0 + 1153)
28672 free blocks, 4077 free inodes, 2302 directories, 4077 unused inodes
Free blocks: 69632-98303
Free inodes: 20500-24576
Group 3: (Blocks 98304-131071) [ITABLE_ZEROED]
Checksum 0x372b, unused inodes 7865
Backup superblock at 98304, Group descriptors at 98305-98305
Reserved GDT blocks at 98306-98368
Block bitmap at 68 (bg #0 + 68), Inode bitmap at 100 (bg #0 + 100)
Inode table at 1665-2176 (bg #0 + 1665)
32703 free blocks, 7865 free inodes, 327 directories, 7865 unused inodes
Free blocks: 98369-131071
Free inodes: 24904-32768
Group 4: (Blocks 131072-163839) [ITABLE_ZEROED]
Checksum 0x4c7a, unused inodes 8154
Block bitmap at 69 (bg #0 + 69), Inode bitmap at 101 (bg #0 + 101)
Inode table at 2177-2688 (bg #0 + 2177)
32768 free blocks, 8154 free inodes, 38 directories, 8154 unused inodes
Free blocks: 131072-163839
Free inodes: 32807-40960
Group 5: (Blocks 163840-196607) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xbd51, unused inodes 8192
Backup superblock at 163840, Group descriptors at 163841-163841
Reserved GDT blocks at 163842-163904
Block bitmap at 70 (bg #0 + 70), Inode bitmap at 102 (bg #0 + 102)
Inode table at 2689-3200 (bg #0 + 2689)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 163905-196607
Free inodes: 40961-49152
Group 6: (Blocks 196608-229375) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
Checksum 0xf453, unused inodes 8192
Block bitmap at 71 (bg #0 + 71), Inode bitmap at 103 (bg #0 + 103)
Inode table at 3201-3712 (bg #0 + 3201)
32768 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 196608-229375
Free inodes: 49153-57344
Group 7: (Blocks 229376-262143) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xfcc2, unused inodes 8192
Backup superblock at 229376, Group descriptors at 229377-229377
Reserved GDT blocks at 229378-229440
Block bitmap at 72 (bg #0 + 72), Inode bitmap at 104 (bg #0 + 104)
Inode table at 3713-4224 (bg #0 + 3713)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 229441-262143
Free inodes: 57345-65536
$ truncate -s 4G a.img
$ e2fsck -f a.img
e2fsck 1.42-WIP (02-Jul-2011)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
a.img: 20864/65536 files (0.0% non-contiguous), 35953/262144 blocks
$ dumpe2fs a.img
dumpe2fs 1.42-WIP (02-Jul-2011)
Filesystem volume name: <none>
Last mounted on: /mnt
Filesystem UUID: 4f2361c3-2755-4a6a-bf28-dd7e1a4dd772
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 65536
Block count: 262144
Reserved block count: 13107
Free blocks: 226191
Free inodes: 44672
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 63
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
Flex block group size: 32
Filesystem created: Tue Aug 2 02:29:45 2011
Last mount time: Tue Aug 2 02:29:50 2011
Last write time: Tue Aug 2 02:33:36 2011
Mount count: 0
Maximum mount count: 20
Last checked: Tue Aug 2 02:33:36 2011
Check interval: 0 (<none>)
Lifetime writes: 746 kB
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: a42d0c4e-0207-4fd4-94e7-b71bc107ae90
Journal backup: inode blocks
Journal features: (none)
Journal size: 32M
Journal length: 8192
Journal sequence: 0x00000001
Journal start: 0
Group 0: (Blocks 0-32767) [ITABLE_ZEROED]
Checksum 0x3fe2, unused inodes 0
Primary superblock at 0, Group descriptors at 1-1
Reserved GDT blocks at 2-64
Block bitmap at 65 (+65), Inode bitmap at 97 (+97)
Inode table at 129-640 (+129)
24746 free blocks, 0 free inodes, 3 directories
Free blocks: 8022-32767
Free inodes:
Group 1: (Blocks 32768-65535) [ITABLE_ZEROED]
Checksum 0x1361, unused inodes 0
Backup superblock at 32768, Group descriptors at 32769-32769
Reserved GDT blocks at 32770-32832
Block bitmap at 66 (bg #0 + 66), Inode bitmap at 98 (bg #0 + 98)
Inode table at 641-1152 (bg #0 + 641)
9128 free blocks, 0 free inodes, 975 directories
Free blocks: 49152-57343, 60376-60383, 60512-61439
Free inodes:
Group 2: (Blocks 65536-98303) [ITABLE_ZEROED]
Checksum 0x3b77, unused inodes 4077
Block bitmap at 67 (bg #0 + 67), Inode bitmap at 99 (bg #0 + 99)
Inode table at 1153-1664 (bg #0 + 1153)
28672 free blocks, 4077 free inodes, 2302 directories, 4077 unused inodes
Free blocks: 69632-98303
Free inodes: 20500-24576
Group 3: (Blocks 98304-131071) [ITABLE_ZEROED]
Checksum 0x372b, unused inodes 7865
Backup superblock at 98304, Group descriptors at 98305-98305
Reserved GDT blocks at 98306-98368
Block bitmap at 68 (bg #0 + 68), Inode bitmap at 100 (bg #0 + 100)
Inode table at 1665-2176 (bg #0 + 1665)
32703 free blocks, 7865 free inodes, 327 directories, 7865 unused inodes
Free blocks: 98369-131071
Free inodes: 24904-32768
Group 4: (Blocks 131072-163839) [ITABLE_ZEROED]
Checksum 0x4c7a, unused inodes 8154
Block bitmap at 69 (bg #0 + 69), Inode bitmap at 101 (bg #0 + 101)
Inode table at 2177-2688 (bg #0 + 2177)
32768 free blocks, 8154 free inodes, 38 directories, 8154 unused inodes
Free blocks: 131072-163839
Free inodes: 32807-40960
Group 5: (Blocks 163840-196607) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xbd51, unused inodes 8192
Backup superblock at 163840, Group descriptors at 163841-163841
Reserved GDT blocks at 163842-163904
Block bitmap at 70 (bg #0 + 70), Inode bitmap at 102 (bg #0 + 102)
Inode table at 2689-3200 (bg #0 + 2689)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 163905-196607
Free inodes: 40961-49152
Group 6: (Blocks 196608-229375) [INODE_UNINIT, BLOCK_UNINIT, ITABLE_ZEROED]
Checksum 0xf453, unused inodes 8192
Block bitmap at 71 (bg #0 + 71), Inode bitmap at 103 (bg #0 + 103)
Inode table at 3201-3712 (bg #0 + 3201)
32768 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 196608-229375
Free inodes: 49153-57344
Group 7: (Blocks 229376-262143) [INODE_UNINIT, ITABLE_ZEROED]
Checksum 0xfcc2, unused inodes 8192
Backup superblock at 229376, Group descriptors at 229377-229377
Reserved GDT blocks at 229378-229440
Block bitmap at 72 (bg #0 + 72), Inode bitmap at 104 (bg #0 + 104)
Inode table at 3713-4224 (bg #0 + 3713)
32703 free blocks, 8192 free inodes, 0 directories, 8192 unused inodes
Free blocks: 229441-262143
Free inodes: 57345-65536
$ sudo mount -t ext4 -o loop a.img /mnt/
$ df
[...]
/dev/loop0 1032088 127324 852336 13% /mnt
$ sudo umount /mnt
-----------------------------------------
-----------------------------------------
-----------------------------------------
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