IBM IC35L020 Hard Drive Specifications - Page 28
Random access, T = A + B + C + 16
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T = A + B + C + (16,777,216/D) + (512/E) (READ) where T = Calculated time (in seconds) A = Command process time (Command Overhead) (in seconds) B = Average seek time (in seconds) C = Average latency (in seconds) D = Sustained disk-buffer transfer rate (bytes/s) E = Buffer-host transfer rate (bytes/s) 4.3.6.2 Random access The following figure illustrates the case of 3-disk Disk Enclosure. Operation Random Read Typical (s) 55 Maximum (s) 60 Figure 13. Random Access Performance The above table gives the time required to execute a total of 1000h read/write commands which access a random LBA. T = (A + B + C + 512/D + 512/E) * 4096 (READ) where T = Calculated time (in seconds) A = Command process time (Command Overhead) (in seconds) B = Average seek time (in seconds) C = Latency D = Average sustained disk-buffer transfer rate (bytes/sec) E = Buffer-host transfer rate (bytes/sec) Deskstar 60 GXP Hard disk drive specification 14