Retail Box, Hot Plug Drive assembly to add to or directly replace a failed 128418-B21, 128417-B21, 313756-B21, 336358-B21, 400739-B21, 143919-001 and 104660-001 on select Compaq ProLiant servers with card edge drive storage backplanes, except Very Low Power, new manufacture (not old stock) and higher reliablility. NOT BULK Package, NOT Refurb like others. This drive is NOT Universal. This 18.4GB 10,000RPM Low Profile (1") Hot Swap Drive has a 4MB Cache and a Ultra160, Ultra3 and Ultra2 interface compatible with all HP/Compaq Proliant Servers listed below. Formatted Capacity: 18.4GB Compression: (Native/Uncompressed) Data Storage Device Type: SAS (Server Attached Storage) device Hard Drive Device Type: Internal hard drive Interface Type: 80-pin Ultra 160 SCSI Interface: Ultra, Ultra2, Ultra160, Ultr3, Wide SCSI Formatted Internal Transfer Rate (Min.): 26.7MB/sec Formatted Internal Transfer Rate (Max.): 40.2MB/sec External I/O Transfer Rate (Max.): 160MB/sec Average Seek Time Read: 5.2ms typical Default Buffer: 4MB Spindle Speed: 10033 RPM MTBF: 1,200,000 hours S.M.A.R.T. Support: Yes Warranty: 3-year Compatibility: Proliant Models: Storage System/U, 7000, 6500, 6000, 5500, 300, 1850r(450 & Below) and 850r. Other Proliants with card edge backplane but speeds may vary due to lack og Ultra2/3 controllers. Also available in 36GB 15k , 72MB , 147GB and 182GB Versions! Availability: Usually ships the next business day. 128418-b21 oOriginal Retail Price: $407.00Our Current Price: $321.00Options: No Options15,000 RPM(+69)