fdisk实际操作时，碰到的简单问题
linux下格式化磁盘----fdisk简单使用这个文档已经说的很清楚了，但是实际操作时，还是会碰到问题的。
the factory default fs is vfat and for obvious reasons I wanted to
format it to ext3 (leaving a 15GB fat partition for emergency).
I proceeded the following way:
- 'sudo fdisk /dev/sdc'
- 'd' to delete the only partition
- 'n' to create the two partitions mentioned above
- 'w' to write the changes to disk
and here I got the problem, this is the message:
--------------------------------------------------------------------------------------
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device
or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
这里提示我们要reboot
--------------------------------------------------------------------------------------
if I commit the 'w' command with the disk unmounted: he immediately
says "Calling ioctl()..." and then before saying "warning..." he
mounts the device.
anyway, if I call the 'p' command in fdisk I get the new partition
table:
-----------------------------------------------------------------------
如果没有reboot
>>mkfs -t ext3 -c /dev/hda8
提示如下：
mke2fs 1.35 (28-Feb-2004)
mkfs.ext3: Device size reported to be zero.Invalid partition specified, or
partition table wasn't reread after running fdisk, due to
a modified partition being busy and in use.You may need to reboot
to re-read your partition table.
这里就是没有读到有效的分配盘，也明确提示我们要重启了。
>>reboot
重启登陆后，再次执行
>>mkfs -t ext3 -c /dev/hda8
提示信息如下：
mke2fs 1.32 (09-Nov-2002)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
85440 inodes, 170682 blocks
8534 blocks (5.00%) reserved for the super user
First data block=0
6 block groups
32768 blocks per group, 32768 fragments per group
14240 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840
Checking for bad blocks (read-only test): done
Writing inode tables: done
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
>>mount /dev/hda8 /tmp/hda8
>>df -Th
……省略
/dev/hda8 ext3 657M 17M 607M 3% /tmp/hda8
这里需要提示，初学这初次操作者，其实很简单，认真的看英文提示，一般情况下肯定说的很清楚了。
没有那么难的，加油。
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