[译]uniq用法解释
[原]Linux下crontab中的宏
Dec
10
[转]红旗Linux下使用HP MSL 6060磁带库 
四、操作磁带库
1.使用mtx包
主要用于控制机械手作导带换带、连接slot（插槽）到driver（驱动器）操作
红旗Linux DC Server 4.1有自带mtx-1.2.18-1.i386.rpm安装包，在第一张光盘，安装完之后，会在/usr/sbin/mtx
[1]mtx作检查磁带库状态操作
引用
# mtx –f /dev/nsth0-0c0i0l0 status
Storage Changer /dev/nsth0-0c0i0l0:4 Drives, 60 Slots ( 2 Import/Export )
Data Transfer Element 0:Empty
Data Transfer Element 1:Empty
Data Transfer Element 2:Empty
Data Transfer Element 3:Empty
Storage Element 1:Full
Storage Element 2:Full
Storage Element 3:Full
Storage Element 4:Full
Storage Element 5:Full
Storage Element 6:Full
Storage Element 7:Full
Storage Element 8:Full
Storage Element 9:Full
Storage Element 10:Full
Storage Element 11:Empty
Storage Element 12:Empty
Storage Element 13:Empty
Storage Element 14:Empty
Storage Element 15:Full
Storage Element 16:Full
Storage Element 17:Full
Storage Element 18:Full
Storage Element 19:Full
Storage Element 20:Full
Storage Element 21:Full
Storage Element 22:Empty
Storage Element 23:Full
Storage Element 24:Empty
Storage Element 25:Empty
Storage Element 26:Empty
Storage Element 27:Empty
Storage Element 28:Empty
Storage Element 29:Empty
Storage Element 30:Full :VolumeTag=NK0224L1
Storage Element 31:Full :VolumeTag=NK0225L1
Storage Element 32:Full
Storage Element 33:Full
Storage Element 34:Full
Storage Element 35:Full
Storage Element 36:Full
Storage Element 37:Full
Storage Element 38:Full
Storage Element 39:Full
Storage Element 40:Empty
Storage Element 41:Empty
Storage Element 42:Empty
Storage Element 43:Empty
Storage Element 44:Empty
Storage Element 45:Full
Storage Element 46:Full
Storage Element 47:Empty
Storage Element 48:Empty
Storage Element 49:Empty
Storage Element 50:Empty
Storage Element 51:Full
Storage Element 52:Full
Storage Element 53:Full
Storage Element 54:Full
Storage Element 55:Empty
Storage Element 56:Full
Storage Element 57:Full
Storage Element 58:Full
Storage Element 59 IMPORT/EXPORT:Empty
Storage Element 60 IMPORT/EXPORT:Empty
Storage Changer /dev/nsth0-0c0i0l0:4 Drives, 60 Slots ( 2 Import/Export )
Data Transfer Element 0:Empty
Data Transfer Element 1:Empty
Data Transfer Element 2:Empty
Data Transfer Element 3:Empty
Storage Element 1:Full
Storage Element 2:Full
Storage Element 3:Full
Storage Element 4:Full
Storage Element 5:Full
Storage Element 6:Full
Storage Element 7:Full
Storage Element 8:Full
Storage Element 9:Full
Storage Element 10:Full
Storage Element 11:Empty
Storage Element 12:Empty
Storage Element 13:Empty
Storage Element 14:Empty
Storage Element 15:Full
Storage Element 16:Full
Storage Element 17:Full
Storage Element 18:Full
Storage Element 19:Full
Storage Element 20:Full
Storage Element 21:Full
Storage Element 22:Empty
Storage Element 23:Full
Storage Element 24:Empty
Storage Element 25:Empty
Storage Element 26:Empty
Storage Element 27:Empty
Storage Element 28:Empty
Storage Element 29:Empty
Storage Element 30:Full :VolumeTag=NK0224L1
Storage Element 31:Full :VolumeTag=NK0225L1
Storage Element 32:Full
Storage Element 33:Full
Storage Element 34:Full
Storage Element 35:Full
Storage Element 36:Full
Storage Element 37:Full
Storage Element 38:Full
Storage Element 39:Full
Storage Element 40:Empty
Storage Element 41:Empty
Storage Element 42:Empty
Storage Element 43:Empty
Storage Element 44:Empty
Storage Element 45:Full
Storage Element 46:Full
Storage Element 47:Empty
Storage Element 48:Empty
Storage Element 49:Empty
Storage Element 50:Empty
Storage Element 51:Full
Storage Element 52:Full
Storage Element 53:Full
Storage Element 54:Full
Storage Element 55:Empty
Storage Element 56:Full
Storage Element 57:Full
Storage Element 58:Full
Storage Element 59 IMPORT/EXPORT:Empty
Storage Element 60 IMPORT/EXPORT:Empty
从以上信息显示4个驱动器(driver)全为空，有60个slot，其中有磁带的slot显示为Full，那么我们可以做将slot中的磁带放到驱动器中
[2]放带操作
命令格式为mtx –f 机械手设备号 slot号 driver号
# mtx –f /dev/nsth0-0c0i0l0 load 56 0
[3]拨带操作
# mtx –f /dev/nsth0-0c0i0l0 unload 56 0
除了以上简单操作之外，还可以实现将slot移位，如将原有的slot 56的磁带移动到50，这只是逻辑上的移动；
更详细的操作请查阅man mtx
五、重做核心
加载QLA驱动之后，必须重启系统测试QLA驱动是否加载成功，重启之后再检查磁带机的驱动器(st)和机械手(sg)是否识别到，若识别到，一切OK。
当一切测试通过后，应更新启动时加载的驱动。
[1]备份原先操作核心
# cp –a /boot/initrd-`uname -r`.img /boot/initrd-`uname -r`-`date +%Y%m%d`.img
[2]重做核心命令：
# mkinitrd -f /boot/initrd-`uname -r`.img `uname -r
`六、备注
原文由：wylonwong wlhuang#redflag-linux.com提供。
内文分页： [1] [2]
