So what kind of performance should people expect from a disk or raid?
How long should it take to create 100G file?
time dd if=/dev/zero of=mako1 bs=65536 count=163840
A customer of ours is using this to create a 10G file and its taking about 20 minutes to create the file on a 12 drive raid 5 with 3ware. After setting ra again (in case the customer did not) and I got about 18 minutes on the same command.
The customer says we should be able to create that file in about 10-20 seconds. ref (http://t2.unl.edu/ce-changelog/dcache04-performance)
[backdated article from old website]