Don'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 A6538A A6538-63001 A6538-69001. Our drive is Very Low Power (compared to the original), state-of-the-art design, new manufacture (not old stock) and higher reliablility. NOT BULK Package, NOT Refurb. This 37GB Low Profile (1") Hot Swap Drive is 10,000RPM and state-of-the-art design with a 4MB Cache and a Ultra320, Ultra3 and Ultra2 interface compatable with HP Disk System DS2100 and DS2300. Formatted Capacity: 36.8GB 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: 10000 RPM MTBF: 1,200,000 hours S.M.A.R.T. Support: Yes Warranty: 3-year Availability: Usually ships the next business day. A6538Ao$278.47