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vxmake从底层做卷，比起用vxassist直接卷，更具有挑战性，更能够帮助我们理解VxVM卷的结构！ 例1：做镜像，步骤是先做两子磁盘和plex,再镜像两plex #vxassist make aaa 100m layout=mirror new01 new02 (raid0) #vxmake –g new sd new01-01 new01,0,100m (子磁盘) #vxmake –g new sd new02-01 new02,0,100m # vxmake -g new plex aaa-01 sd=new01-01 (plex) # vxmake -g new plex aaa-02 sd=new02-01 #vxmake –g new –U fsgen vol aaa plex=aaa-01 (关联vol) #vxplex att aaa aaa-01 #vxvol start aaa (起动vol) #newfs /dev/vx/dsk/new/aaa #mount /dev/vx/dsk/new/aaa /data 例2：做条带化，其中注意vxvm带的默认stwidth为64K，所以在做条带plex，一定要指定 #vxassist make aaa 100m layout=stripe new01 new02 #vxmake –g new sd new01-01 new01,0,100m (子磁盘) #vxmake –g new sd new02-01 new02,0,100m #vxmake -g new plex aaa-01 layout=stripe ncolumn=2 stwidth=64k sd=new01-01,new02-01 #vxmake –g new –U fsgen vol aaa plex=aaa-01 #vxvol start aaa 做个小试验，可以将stripe的子磁盘，全部打乱，再重新组合！ #vxassist make aaa 100m layout=stripe new01 new02 new03 #vxsd –f dis new01-01 (RAID子磁盘的再组合) #vxsd –f dis new02-01 #vxsd –f dis new03-01 # vxsd -l 0 assoc aaa-01 new01-01 （结合stripe子磁盘） # vxsd -l 2 assoc aaa-01 new03-01 # vxsd -l 1 assoc aaa-01 new02-01 #vxplex att aaa aaa-01 #vxvol start aaa 例3：raid0+1和做两个stripe差不多 #vxassit make aaa 100m layout=mirror-stripe new01 new02 new03 new04 #vxmake –g new sd new01-01 new01,0,100m (子磁盘) #vxmake –g new sd new02-01 new02,0,100m #vxmake –g new sd new03-01 new03,0,100m #vxmake –g new sd new04-01 new04,0,100m #vxmake -g new plex aaa-01 layout=stripe ncolumn=2 stwidth=64k sd=new01-01,new02-01 #vxmake –g new plex aaa-02 layout=stripe ncolumn=2 stwidth=64k sd=new03-01,new04-01 #vxmake –g new –U fsgen vol aaa plex=aaa-01 (stripe卷) #vxplex att aaa aaa-02 #vxvol start aaa 小试验，位于卷aaa，两个条带的相对位子磁盘同时损坏，这时raid01就己经瘫痪了，唯一的办法就是把两个条带的子磁盘分离出来，再给合成一个新的卷，及时备份数据！这种操作有一定的危险性，有时重组后会无法起动卷，起动卷后卷只读，所以要格外小心！ # vxassit make aaa 100m layout=mirror-stripe new01 new02 new03 new04 #new01 new04损坏 (RAID01子磁盘重组) #vxplex dis aaa-01 #vxsd –f dis new01-01 #vxsd –f dis new04-01 #vxmake –g new sd new01-01 new01,0,102400 #vxmake –g new sd new04-01 new04,0,103600 #vxsd –f dis new02-01 #vxsd –l 1 assoc aaa-02 new02-01 (残余子磁盘合成卷) #vxvol –f start aaa #vxsd mv new02-01 new04-01 (移动子磁盘) #vxsd –l 0 assoc aaa-01 new01-01 #vxsd –l 1 assoc aaa-01 new02-01 #vxplex att aaa aaa-01 (plex再结合) # vxassit make aaa 100m layout=mirror-stripe new01 new02 new03 new04 #vxplex dis aaa-01 #vxsd dis new02-01 (交换子磁盘) #vxsd dis new04-01 #vxsd –l 1 assoc aaa-01 new04-01 #vxsd –l 1 assoc aaa-02 new02-01 #vxplex att aaa aaa-01 #vxmake –g new –U fsgen vol bbb plex=aaa-01 #vxvol start bbb 例4：做raid5卷，raid5也就是特殊的条带化,子磁盘同样可以分离重组 #vxassist make aaa 200m layout=raid5 new01 new02 new03 new04 #vxmake –g new sd new01-01 new01,0,100m #vxmake –g new sd new02-01 new02,0,100m #vxmake –g new sd new03-01 new03,0,100m #vxmake –g new plex aaa-01 layout=raid5 ncolumn=3 stwidth=16k/ (默认16k) sd=new01-01,new02-01,new03-01 #vxmake –g new –U raid5 vol aaa plex=aaa-01 #vxvol start aaa #vxassist –g new addlog aaa #newfs /dev/vx/dsk/new/aaa #vxassist make aaa 200m layout=raid5 new01 new02 new03 new04 #vxsd –f dis new03-01 #vxsd –l 2 assoc aaa-01 new03-01
