measures the P20's access
time at 13.5 milliseconds, just wee bit higher than a the tightly grouped trio of the Maxtor DiamondMax Plus 60
, the Quantum Fireball Plus AS
, and the Western Digital WD800BB
. This in turn results in an access time significantly higher than IBM's Deskstar 60GXP
and significantly lower than Seagate's Barracuda ATA III
. Subtracting the average rotational latency
of 4.2 milliseconds for 7200 RPM operation yields a measured seek time of 9.2 milliseconds... slightly off the mark.
An outer-zone transfer rate of 34.5 MB/sec places the P20 at the lower end of the pack. Our sample exhibits some dips in the transfer rate graph indicative of remapped sectors... these shouldn't affect performance tests, however.