Toshiba MK6017MAP - Manual (Page 15)

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Copyright © 2000 Toshiba corporation. All rights reserved.
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5. PERFORMANCE
Access time ( msec ) <*1>
Track to track seek <*2> 3
Average seek <*3> 13
Max. seek <*4> 24
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
<*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.