All our Hot Plug drives are Guaranteed Compatible or your money back! Why buy Compaq xxxxxx-B22 drives when you can by e4's B22-O drives and SAVE! e4's B22-O - 5 Year Warrantee .vs.           Compaq's A - 3 Year or inherit the Server's Same great drives Same Hot Swap Tray Compaq Hot Plug Compatibility Table Old Style Cage Upgrade $20.00 Compaq Hot Plug Drive Compatibility List 18-181GB Hard Drives 18-146GB Hard Drives 287497-B21 o Orig Manuf 1GB 1pc Kit for ML350(G3), PC2100 ECC Registered DDR DIMM $159.95 300679-B21 o Orig Manuf 1GB 2pc Kit for ML370(G3) PC2100 ECC Registered DDR DIMM $159.95 300680-B21 o Orig Manuf 2GB 2pc Kit for ML370(G3) PC2100 ECC Registered DDR DIMM $319.95 300682-B21 o Orig Manuf 4GB 2pc Kit for ML370(G3) PC2100 ECC Registered DDR DIMM $699.98