Product manual

6 Pipeline HD Mini Series SATA Product Manual, Rev. E

2.4 Physical organization

Drive model Read/write heads Number of discs

ST9500323CS 4

ST9320328CS 3

ST9250311CS

2 1

ST91603110CS

2.5 Recording and interface technology

Interface Serial ATA (SATA)

Recording method Perpendicular

Recording density BPI (bits/inch avg) 1,490k

Track density TPI (tracks/inch avg) 265k

Areal density (Gbits/inch

avg) 394

Spindle speed (RPM) (± 0.2%) 5,400

Maximum Internal transfer rate (Mbits/sec) 1,175

I/O data-transfer rate (Mbytes/sec max) 300 default / 150 available via Seagate specific SCT command

Interleave 1:1

Cache buffer 8 Mbytes (8,192 kbytes)

2.6 Physical characteristics

Drive specification

Height (mm)

(inches)

9.5 +/-0.2

0.374 +/-0.0078

Width (mm)

(inches)

69.85 +/-0.25

2.75 +/-0.0098

Length (mm)

(inches)

100.35 +0.55 / -0.25

3.957 +0.079 / -0.0098

Weight (max)

ST9500323CS, ST9320328CS,

ST9250311CS, ST91603110CS

110 grams

0.243 pounds

2.7 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using

drive diagnostics. The specifications in the table 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 ran-

dom tracks, less overhead.

Table 2: Typical seek times

Seek times (msec) Read