IBM DTLA-307075 Hard Drive Specifications - Page 28
Throughput
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4.4.6 Throughput 4.4.6.1 Simple sequential access Sequential read Zone 0 Zone 14 Typical (sec) DTLA-305XXX DTLA-307XXX 0.57 0.48 1.20 0.95 Max (sec) DTLA-305XXX DTLA-307XXX 0.60 0.50 1.26 1.00 Figure 13. Simple Sequential Access performance The above table gives the time required to read/write for a total of 8000x consecutive blocks (16,777,216 bytes) accessed by 128 read commands. Typical and Max values are given by 105% and 110% of T respectively throughout following performance description. Note: It is assumed that a host system responds instantaneously and host data transfer is faster than sustained data rate. T = A + B + C + 16,777,216/D + 512/E (READ) where T = Calculated time (sec) A = Command process time (Command overhead) (sec) B = Average seek time (sec) C = Average latency (sec) D = Sustained disk-buffer transfer rate (byte/sec) E = Buffer-host transfer rate (byte/sec) 4.4.6.2 Random access Random read DTLA-305XXX DTLA-307XXX Typical (sec) 65 55 Maximum (sec) 68 57 Figure 14. 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 (sec) A = Command process time (Command overhead) (sec) B = Average seek time (sec) C = Latency D = Average sustained disk-buffer transfer rate (byte/sec) E = Buffer-host transfer rate (byte/sec) Deskstar 40GV & 75GXP hard disk drive specifications 16