Stripe-unit size

With RAID technology, data is striped across an array of physical disks.

Striping data across an array of physical disks complements the way the operating system requests data. The granularity at which data is stored on one disk of the array before subsequent data is stored on the next disk of the array is called the stripe-unit size. The collection of stripe units, from the first disk of the array to the last disk of the array, is called a stripe.

You can set the stripe-unit size of a disk array to 16 KB, 64 KB, 256 KB or 512 KB. You might be able to maximize the performance of your disk array by setting the stripe-unit size to a value that is slightly larger than the size of the average system I/O request. For large system I/O requests, use a stripe-unit size of 256 KB or 512 KB. The recommended stripe size for most applications is 256 KB.