解決umount:device is busy

1、解除安裝時報一個錯：

# umount /gfs/sysdisk/

umount: /gfs/sysdisk: device is busy.

        (In some cases useful info about processes that use

         the device is found by lsof(8) or fuser(1))

2、分析：有程序占有

3、解決

a、查處占有的程序

# fuser -m /gfs/sysdisk/

/gfs/sysdisk/:        3539c

b、kill掉次程序

# kill -9 3539

c、再次解除安裝成功