Seagate ST940813AM ユーザーズマニュアル
EE25 Series Product Manual, Rev. E
9
2.5
Recording and interface technology
2.6
Physical characteristics
2.7
Seek time
Seek measurements are taken with nominal power. All times are measured using drive diagnostics. The spec-
ifications below are defined as follows:
ifications below are defined as follows:
• Track-to-track seek time is an average of all possible single-track seeks in both directions.
• Average seek time is a true statistical random average of at least 5,000 measurements of seeks between
random tracks, less overhead.
Note.
These drives are designed to consistently meet the seek times represented in this manual. Physical
seeks, regardless of mode (such as track-to-track and average), are expected to meet or exceed the
noted values. However, due to the manner in which these drives are formatted, benchmark tests that
include command overhead or measure logical seeks may produce results that vary from these speci-
fications.
seeks, regardless of mode (such as track-to-track and average), are expected to meet or exceed the
noted values. However, due to the manner in which these drives are formatted, benchmark tests that
include command overhead or measure logical seeks may produce results that vary from these speci-
fications.
Technology
Specification
Interface
Parallel ATA
Recording density BPI
540.1k bits/inch typical
Track density TPI
119k tracks/inch typical
Areal density
64.3 Gbits/inch
2
max
Spindle speed
5,400 RPM (± 0.2%)
Internal data-transfer rate
321.1 Mbits/sec max
I/O data transfer rate
100 Mbytes/sec max
Interleave
1:1
Cache buffer
8 Mbytes (8,192 kbytes)
Height
(mm)
(inches)
9.5 +/–0.2
0.374 +/–0.008
Width
(mm)
(inches)
69.85 +/–0.25
2.750 +/–0.010
Length
(mm)
(inches)
100.2 +/–0.25
3.945 +/–0.010
Typical weight
(grams)
(pounds)
100
0.22