当我把LUN磁盘缩小到500G的时候，配置磁盘组就可以看到磁盘了，也能正常加入asm磁盘组了，谁知道oracle配置asm磁盘组的时候，支持一个LUN磁盘最大是多少吗?作者: wangshengmao 时间: 2012-12-05 13:29
居然没人解答，太心寒了作者: l495051275 时间: 2012-12-06 08:17
你多尝试尝试，然后找到那个最大值!!让我们都知道下！！！:wink:作者: ahyan 时间: 2012-12-09 20:05
问题解决了？ASM支持的LUN大小是有限制的。作者: milujite 时间: 2012-12-13 09:23
If you use ASM you do not have any filesystem in ASM (yet). Therefore no restrictions of filesystems will apply to ASM. The database will directly access the ASM Diskgroups and the diskgroup will either consist of block devices (dev/sd*) or character (raw) devices (dev/raw/raw*).
There is one limit to the size of an ASM Disk which is 4 PB (if you storage system can provide such a lun).
However even if you have any circumstances preventing you from having block devices/partitions etc bigger than 2 TB what you would do is create a diskgroup with multiple disk in it. Since you can have 10000 ASM Disks in one Diskgroup (e.g. +DATA) that gives you some space.
Best practices is really to have only 2 Diskgroups one for the DATA and one for the Flashback Recovery Area.
Here is a very good whitepaper for this: http://www.oracle.com/technology ... actices%2009-07.pdf