建立不保留镜像信息系统备份（mksysb)的方法

建立不保留镜像信息系统备份（mksysb)的方法
环境	AIX V4 和 V5
问题	在对根卷组（rootvg)进行了卷组镜像后，如何建立系统备份（mksysb)而不保留镜像信息？
解答	按照下面的步骤操作能够建立系统备份（mksysb)而不保留镜像信息： 1.运行如下命令建立一个新的image.data文件： mkszfile 2.进入到根（/）目录下编辑image.data文件 3. cd / 4. vi image.data 5.下面的例子显示出一个image.data文件的逻辑卷数据（lv_data）的一部分，第一个例子是带有镜像信息，而第二例子是不带镜像信息 的编辑过的版本。改变了的行被用 -->符号标示出并用了粗体显示，想要查看和编辑这个文件，输入如下命令：                   vi image.data           Example 1                      lv_data:                              VOLUME_GROUP= rootvg                              LV_SOURCE_DISK_LIST= hdisk0                              LV_IDENTIFIER= 00000001113f3c62.5                              LOGICAL_VOLUME= hd2                              VG_STAT= active/complete                              TYPE= jfs                              MAX_LPS= 512                   -->        COPIES = 2                              LPs = 70                              STALE_PPs= 0                              INTER_POLICY= minimum                              INTRA_POLICY= center                              MOUNT_POINT= /usr                               MIRROR_WRITE_CONSISTENCY= on                              LV_SEPARATE_PV= yes                              PERMISSION= read/write                              LV_STATE= opened/syncd                              WRITE_VERIFY= off                              PP_SIZE= 4                              SCHED_POLICY= parallel                   -->        PP = 140                              BB_POLICY= relocatable                              RELOCATABLE= yes                              UPPER_BOUND= 32                              LABEL= /usr                              MAPFILE=                              LV_MIN_LPS= 68    Example 2                      lv_data:                              VOLUME_GROUP= rootvg                              LV_SOURCE_DISK_LIST= hdisk0                              LV_IDENTIFIER= 00000001113f3c62.5                              LOGICAL_VOLUME= hd2                              VG_STAT= active/complete                              TYPE= jfs                               MAX_LPS= 512                    -->        COPIES = 1                              LPs = 70                              STALE_PPs= 0                              INTER_POLICY= minimum                              INTRA_POLICY= center                              MOUNT_POINT= /usr                              MIRROR_WRITE_CONSISTENCY= on                              LV_SEPARATE_PV= yes                              PERMISSION= read/write                              LV_STATE= opened/syncd                              WRITE_VERIFY= off                              PP_SIZE= 4                              SCHED_POLICY= parallel                   -->        PP = 70                              BB_POLICY= relocatable                              RELOCATABLE= yes                              UPPER_BOUND= 32                              LABEL= /usr                              MAPFILE=                              LV_MIN_LPS= 68 在例子2（Example 2)里COPIES值被改成了1并且PP值被调整等于LPs值，对image.data文件里任何逻辑卷数据（lv_data) 相应部分都要做如此改变。改变完成后保存退出。 6.在命令行运行mksysb命令将利用你编辑过的image.data文件进行系统备份： mksysb /dev/rmtX (X代表所使用的磁带机设备号） 警告： 1.不要在smit菜单里运行mksysb,因为这样做将更新image.data文件并重写已经做过的任何改变； 2.运行mksysb命令时千万不要加 -i 参数,因为这样做同样会更新image.data文件.