This is to give you an idea of what your RAID performance might be based on the drive characteristics and other factors. Don't bet the job on this tool. It is an estmate based on a limited amount of information.

Notes:

1. Read and Write Cache Hit Ratios are subjective. The tool doesn't know your cache size so if you set write cache to 100% your numbers will be way off. Start at zero, better a little low than way to high.
   Testing on a P411 and P800 from HP with 512MB cache on the card setting the cache to 100% writes was comprable to setting the tool to 43% write cache hit using SQLIO to do the testing.
2. If you don't choose a disk you can enter your own disk parameters. If you choose a disk and want to then modify the numbers set it back to Choose Disk and you can edit the fields again.
3. Disks currently in the list are as correct as I can make them. Some drives have estimates where the data is incomplete.

Enjoy!

copyright © 2009-2011 Wes Brown

Hard Disk
Disk Sector Size	512 Bytes4096 Bytes
Disk Speed (RPM)	420054007200100001002215000
Sequential Seek Time Read
Sequential Seek Time Write
Random Seek Time Read
Random Seek Time Write
Min MB/Sec
Max MB/Sec
Rotational Latency
Disk Capacity

RAID Configuration
Number of Disks
RAID Level	RAID 0RAID 5RAID 6RAID 10
RAID Stripe Size	483264128256512102420484096
IO Request Size	12481632641282561024
IO Type (Read,Write,Both)	ReadWriteBoth
IO Pattern (Random,Seqential,Both)	RandomSequentialBoth
Percent Reads
Percent Writes
Cache Hit Ratio Reads
Cache Hit Ratio Writes
Concurrent Users
Target Number of IOs
Target MB/Sec Throughput