Some months ago, I tried to start a own Wiki site to maintain Know-How. Unfortunately I stopped filling it with updates as soon as I started this Blog 🙂
To not loose the small but interesting Knowledge, I want just put it in here:
Dell uses only a 2-Disk RAID1 LUN for Database Logfiles, while using a 10-Disk RAID10 for Database.
There are three basic parameters to alter when running the I/O tests: block size, read/write, and serial/random. For SQL Server, the minimum tests to run are 8-KB and 64-KB block sizes, both serial and random, and both read and write. Most of the ratings you find on the Web are stated in throughput of bytes/sec for the 64-KB serial read test (which gives the highest throughput rating). A value of over 250 MB/sec per core for today’s computers is typically sufficient.