最初由 hrb_qiuyb 发布
[B]
xp这样的阵列，在主机所能看到的cXtXdX这样的盘是在阵列中每 4块物理盘做raid后再做open-E、open-V等后所生成的逻辑盘。
实际上，在做这样的划分时并未有设定stripe size的地方。
从raid的概念上讲，只有raid 0所标识的为条带的概念。
不过对于xp这样级别的阵列我认为在做raid5之后所划的逻辑盘也应该是做stripe的。不过stripe size是多少不能人为设定，也不清楚该是多少。
你所说的4-32k我也不太清楚是不是eva当中存在的，还是在划lv时指定的？
xpinfo是hp的内部工具，很有用的，可以找hp工程师要一下。 [/B]
对楼主所说的阵列确实不清楚，没有使用过。
With RAID technology, data is striped across an array of physical drives. This data distribution scheme complements the way the operating system requests data. The stripe-units-size is a global setting on the controller and can be configured to 8k (default), 16k, 32k and 64k.
The granularity at which data is stored on one drive of the array before subsequent data is stored on the next drive of the array is called the stripe-unit size. You can set the stripe-unit size to 8 KB, 16 KB, 32 KB, or 64 KB. You can maximize the performance of your ServeRAID controller by setting the stripe-unit size to a value that is close to the size of the system I/O requests. For example, performance in transaction-based environments, which typically involve large blocks of data, might be optimal when the stripe-unit size is set to 32KB or 64KB. However, performance in file and print environments, which typically involve multiple small blocks of data, might be optimal when the stripe-unit size is set to 8KB or 16KB.
The collection of stripe units, from the first drive of the array to the last drive of the array, is called a stripe.
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