Retail Box Direct Hot Swap Drive replacement accessory for the HP A6540A and A6540-69001, except Very Low Power, new manufacture (not old stock) and higher reliablility. NOT BULK Package, NOT Refurb. This 18GB Low Profile (1") Hot Swap Drive is 15,000RPM and has a 4MB Cache, state-of-the-art design and a Ultra320, Ultra3 and Ultra2 interface compatable with HP Disk System DS2100 and DS2300 Formatted Capacity: 18.3GB Interface Type: 80-pin Ultra 3 and Ultra 320 SCSI Formatted Internal Transfer Rate (Min.): 57MB/sec Formatted Internal Transfer Rate (Max.): 86MB/sec External I/O Transfer Rate (Max.): 320MB/sec Average Seek Time Read: 3.6ms typical Default Buffer: 4MB Spindle Speed: 15000 RPM MTBF: 1,200,000 hours S.M.A.R.T. Support: Yes Warranty: 3-year Availability: Usually ships the next business day. A6540Ao$268.45