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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> | 4 sec ( Typical ) |
( Up to Drive Ready) | 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.
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