Well, you need to know some details for this to work.  Which RAID controller do you have? When you installed OMSA, you probably had out of date firmware, which disabled the Storage portion of the install.  Run the install again, choose Custom and make sure that Storage Management is installed.  If it still doesn't show, you will need to update your system firmware first (BIOS, ESM/BMC, RAID (driver first)).
Dear All,  I have a Dell PowerEdge 1800 Server with above mentioned PERC configuration. I have 5 X 73GB 10K HDDs installed, the total usable space is 340GB [21GB (C: Drive) and 319GB (D: Drive)]. I have a free HDD slot and intend to add one HDD, what is the procedure. I meant, I have the same HDD of 73GB of 10K to add, but I am not sure how to add it. Please advice.
PE 1800 PERC LD 0 PERCRAID SCSI Disk Drive