Linux 格式化分区 报错Could not stat --- No such file or directory 和 partprobe 命令

分区的过程正常：[root@db1 /]# fdisk -l Disk /dev/sda: 21.4 GB, 21474836480 bytes255 heads, 63 sectors/track, 2610 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System/dev/sda1   *           1          13      104391   83  Linux/dev/sda2              14         650     5116702+  83  Linux/dev/sda3             651         841     1534207+  82  Linux swap / Solaris[root@db1 /]# fdisk /dev/sda The number of cylinders for this disk is set to 2610.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:1) software that runs at boot time (e.g., old versions of LILO)2) booting and partitioning software from other OSs   (e.g., DOS FDISK, OS/2 FDISK) Command (m for help): nCommand action   e   extended   p   primary partition (1-4)pSelected partition 4First cylinder (842-2610, default 842):Using default value 842Last cylinder or +size or +sizeM or +sizeK (842-2610, default 2610):Using default value 2610 Command (m for help): wThe 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. 再次查看，分区已经划好：[root@db1 /]# fdisk -l Disk /dev/sda: 21.4 GB, 21474836480 bytes255 heads, 63 sectors/track, 2610 cylindersUnits = cylinders of 16065 * 512 = 8225280 bytes    Device Boot      Start         End      Blocks   Id  System/dev/sda1   *           1          13      104391   83  Linux/dev/sda2              14         650     5116702+  83  Linux/dev/sda3             651         841     1534207+  82  Linux swap / Solaris/dev/sda4             842        2610    14209492+  83  Linux 但是格式化的时候，报错：[root@db1 /]# mkfs -t ext3 /dev/sda4mke2fs 1.39 (29-May-2006)Could not stat /dev/sda4 --- No such file or directory The device apparently does not exist; did you specify it correctly?  解决方法：执行下partprobe 命令        partprobe包含在parted的rpm软件包中。partprobe可以修改kernel中分区表，使kernel重新读取分区表。 因此，使用该命令就可以创建分区并且在不重新启动机器的情况下系统能够识别这些分区。 查看是否安装该命令：[root@db1 dev]# rpm -q partedparted-1.8.1-23.el5 我们执行一下该命令：[root@db1 dev]# partprobeWarning: Unable to open /dev/hdc read-write (Read-only file system).  /dev/hdc has been opened read-only. 然后在格式化，就ok了：[root@db1 dev]# mkfs -t ext3 /dev/sda4mke2fs 1.39 (29-May-2006)Filesystem label=OS type: LinuxBlock size=4096 (log=2)Fragment size=4096 (log=2)1778880 inodes, 3552373 blocks177618 blocks (5.00%) reserved for the super userFirst data block=0Maximum filesystem blocks=3640655872109 block groups32768 blocks per group, 32768 fragments per group16320 inodes per groupSuperblock backups stored on blocks:        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208 Writing inode tables: done                           Creating journal (32768 blocks): doneWriting superblocks and filesystem accounting information: done This filesystem will be automatically checked every 38 mounts or180 days, whichever comes first.  Use tune2fs -c or -i to override.