P2473ADon't trust your data on just any disk. Our disks are highly tested, Retail Box, Hot swap Drive assemblies, to add to or directly replace a failed HP P2473A, P2473-63001, P2473-69001 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! 18GB 10,000RPM Hot Swap Drive for all HP Netservers with low profile hot swap bays. P2473-63001 original Replacement Part Number P2473-69001 original Exchange Part number 146GB and 300GB upgrades are available! Formatted Capacity: 18.7GB Interface Type: 80-pin Ultra320/160/3/2 SCSI Formatted Internal Transfer Rate (Min.): 62MB/sec Formatted Internal Transfer Rate (Max.): 107MB/sec External I/O Transfer Rate (Max.): 320MB/sec Average Seek Time Read: 4.5ms typical Default Buffer: 8MB Spindle Speed: 10025 RPM MTBF: 1,200,000 hours S.M.A.R.T. Support: Yes Warranty: 3-year The 18GB 10,000 RPM Drive is no longer in manufacture therefore our inventory of 3 year warranty parts in running low. 36gb drives may be substituted for 18GB. You may consider ordering the 36GB P2474A for the same price, twice the capacity and a 3 yr. warranty. A 36GB can even replace an 18GB in an existing RAID configuration! OR consider the 36GB 15,000RPM drive, 30% Increase in speed! see options below/a> Availability: Usually ships the next business day. P2473A$268.45Options:: None, STD P2473Ao 18GB 10,000RPMP2473AoXi 36GB 15,000RPM(+148)P2473AoX2i 72GB 15,000RPM(+460)P2473AoX4i 146GB 15,000RPM(+876)P2473AoX8 300GB 10,000RPM(+876)