IOPs & MB/s

Here are two simple formulae to calculate disk subsystem throughput in IOPs and MB/sec

IOPs = [ 1000 / (Average_Latency + Average_Seek_Time ) ]

MB⁄sec = IOPs × ALLOCATION_UNIT_SIZE_IN_MB

Perl script to recursively delete empty folders on a volume

1. Install Perl. ActivePerl is free and can be downloaded from http://www.activestate.com/Products/activeperl/index.mhtml
   
2. Create a text file in the root directory and insert the following text
   
   use File::Find;finddepth(sub{rmdir},'.')
   
   
3. Save and close the file.
   
4. Change the extension of the file to ".pl"
   
5. Run it to rid your volume of all empty folders.