linux无损扩容的方法

root@i-abnawjwo:/# df
Filesystem  1K-blocks Used Available Use% Mounted on
udev    497752  4 497748 1% /dev
tmpfs    101700  440 101260 1% /run
/dev/sda1  20509308 1337636 18106816 7% /
none     4  0   4 0% /sys/fs/cgroup
none    5120  0  5120 0% /run/lock
none    508488  0 508488 0% /run/shm
none    102400  0 102400 0% /run/user
/dev/sdc1  10190136 23032 9626432 1% /data
root@i-abnawjwo:/data# cat hello
test1

fuser -m -v /data
fuser -m -v -i -k /data
lsof /data

root@i-abnawjwo:/# umount /data
root@i-abnawjwo:/# fdisk /dev/sdc

Command (m for help): d
Selected partition 1

Command (m for help): n
Partition type:
 p primary (0 primary, 0 extended, 4 free)
 e extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
Using default value 1
First sector (2048-104857599, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-104857599, default 104857599):
Using default value 104857599

Command (m for help): p

Disk /dev/sdc: 53.7 GB, 53687091200 bytes
64 heads, 32 sectors/track, 51200 cylinders, total 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x305cddae

 Device Boot  Start   End  Blocks Id System
/dev/sdc1   2048 104857599 52427776 83 Linux

Command (m for help): wq
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

root@i-abnawjwo:~# e2fsck -f /dev/sdb1
e2fsck 1.42.9 (4-Feb-2014)
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
/dev/sdb1: 12/655360 files (0.0% non-contiguous), 79664/2621440 blocks
root@i-abnawjwo:~# resize2fs -p /dev/sdb1
resize2fs 1.42.9 (4-Feb-2014)
Resizing the filesystem on /dev/sdb1 to 13106944 (4k) blocks.
The filesystem on /dev/sdb1 is now 13106944 blocks long.

root@i-abnawjwo:~# mount /dev/sdb1 /data/
root@i-abnawjwo:/data# cat hello
acasdcacsa
root@i-abnawjwo:/data# df
Filesystem  1K-blocks Used Available Use% Mounted on
udev    497752  4 497748 1% /dev
tmpfs    101700  428 101272 1% /run
/dev/sda1  20509308 1337768 18106684 7% /
none     4  0   4 0% /sys/fs/cgroup
none    5120  0  5120 0% /run/lock
none    508488  0 508488 0% /run/shm
none    102400  0 102400 0% /run/user
/dev/sdb1  51474044 33100 48803172 1% /data