在使用fdisk創建分區時，我們會使用partprobe命令可以使kernel重新讀取分區信息，從而避免重啟系統，但是有時候會遇到下麵錯誤信息“Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 ... ...
在使用fdisk創建分區時，我們會使用partprobe命令可以使kernel重新讀取分區信息，從而避免重啟系統，但是有時候會遇到下麵錯誤信息“Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.”，如下所示：
[root@getlnx14test scsi_device]# fdisk /dev/sdeThe number of cylinders for this disk is set to 19581.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): pDisk /dev/sde: 161.0 GB, 161061273600 bytes
255 heads, 63 sectors/track, 19581 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sde1 1 15665 125829081 5 Extended
/dev/sde2 15666 17231 12578895 83 Linux
/dev/sde5 1 15665 125829049+ 83 Linux
Command (m for help): nCommand action
l logical (5 or over)
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (17232-19581, default 17232): 17232Last cylinder or +size or +sizeM or +sizeK (17232-19581, default 19581): Using default value 19581Command (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.
[root@getlnx14test scsi_device]# partprobeWarning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
[root@getlnx14test scsi_device]#
其實不要擔心和緊張， /dev/sr0是你的光碟機（CD Drive），因為你運行partprobe時沒有指定設備，所以它會檢查所有的塊設備（block devices），由於光碟機是read-only，所以報上述告警信息，其實避免這個錯誤也很簡單，你只需要使用partprobe檢查、掃描指定設備即可。如下所示
[root@getlnx14test scsi_device]# partprobe /dev/sde[root@getlnx14test scsi_device]#
