After a minor problem with a keepass file last week I was locked out of a Dell Equallogic Unit. Fortunately the solution is not that complex, although you will need the assistance of Equallogic Support.
Step 1. Connect to the Equallogic using a serial console cable. By using a terminal program (hyperterm, putty) you will get a logon prompt.
Step 2. Call your local Dell/Equallogic support desk. Be sure to have the service tag or serial number available.
Step 3. When asked for a username please enter "recoverpassword". The unit will sent a response that includes the firmware version and a 4 digit number. Give this info to the support desk employee.
Step 4. Your support desk employee will do his magic and give you a 4 digit number. Enter it and… Voila. You are admin again on your Equallogic box.
Step 5. Change your password. Using the CLI: Account select grpadmin, passwd, <new password>