P4507ADon't trust your data to those bargain stores old stock, 1999, refurb drives. Buy the best from an Original HP Manufacture producing the level of product quality and service that HP sold to you. e4ServicesInc.com drives undergo the intense qualification process HP required that eliminates data integrity problems, firmware and O/S incompatibilities, and other causes of data corruption or premature failure. Our disks are highly tested, Retail Box, Hot swap Drive assemblies, to add to or directly replace a failed HP P4507A, P4507-63001, P4507-69001 Hot Swap Drive. Our drives are Very Low Power, faster, state-of-the-art design, of new manufacture (not old stock, not refurbs, not 90 day units, not bulk packaged like the other sellers) This drive is more reliable than the original. Uses Only 8 watts! 36GB 15,000RPM Hot Swap Drive for all HP LP series Netservers. P4507-63001 original Replacement Part Number P4507-69001 original Exchange Part number 73 and 146GB upgrades are available! Formatted Capacity: 36.8GB Interface Type: 80-pin Ultra320/160/3/2 SCSI Formatted Internal Transfer Rate (Min.): 82MB/sec Formatted Internal Transfer Rate (Max.): 137MB/sec External I/O Transfer Rate (Max.): 320MB/sec Average Seek Time Read: 3.2ms typical Default Buffer: 8MB Spindle Speed: 15000 RPM MTBF: 1,200,000 hours S.M.A.R.T. Support: Yes Warranty: 3-year Completely Compatible Availability: Usually ships the next business day P4507A$298.45Options:: None72GB_15K(+260)146GB_15K(+732)