Performance – Toshiba MK6017MAP User Manual

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5. PERFORMANCE

Access time ( msec ) <*1>

Track to track seek <*2>

Average seek <*3>

Max. seek <*4>

Rotation speed ( RPM )

4,200 + 0.1%

Average Latency Time ( msec )

7.14

Internal Transfer rate ( Mbits / sec )

133.0

253.5

Host Transfer rate ( Mbytes / sec )

Ultra DMA mode

66.7

PIO mode

16.6

Sector Interleave

1:1

Track skew

Yes

Buffer size ( Kbytes )

256

Cache

Read Ahead Cache

Write Cache

Start time <*5>

( Up to Drive Ready)

4 sec ( Typical )

20 sec ( Maximum )

Recovery time from Stand- by <*5>

4 sec ( Typical )

20 sec ( Maximum )

Command Overhead ( msec )

<*1> Under the condition of normal voltage, 25oC normal temperature and bottom side down.

<*2> Average time to seek all possible adjacent track without head switching.

<*3> Weighted average time to travel between all possible combination of track calculated as below.

Weighted average access time = [ Sum of P(n)*t(n) ] / [ Sum of P(n) ], n = 1 to N.

Where, N ; Total number of tracks.

P(n); Total number of seek for stroke n [ = 2*(N - n) ].

t(n);

Average seek time for stroke n.

Average seek time to seek to stroke n is the average time to 1,000 seeks for stroke n, with random head
switch.

<*4> Average time for 1,000 full stroke seeks with random head switches.

<*5> Typical values are for the condition of normal voltage, 25oC normal temperature and placing bottom
side down. Maximum values are for all conditions specified in this document.