Drive Specifications; Specification Summary Table - Seagate ST3120020A Product Manual

U7 Product Manual, Rev. D
2.0

Drive specifications

Unless otherwise noted, all specifications are measured under ambient con-
ditions, at 25°C, and nominal power. For convenience, the phrases the drive
and this drive are used throughout this manual to indicate ST3120020A,
ST380022A, ST360012A, ST340012A and ST330012A model drives.
2.1

Specification summary table

The specifications listed in this table are for quick reference. For details on
specification measurement or definition, see the appropriate section of this
manual.
Drive
specification
Formatted Gbytes
(512 bytes/sector)
Guaranteed
sectors
Bytes per sector
Default sectors per
track
Default read/write
heads
Default cylinders
Physical read/write
heads
Discs
Recording density
BPI (bits/inch max)
Track density TPI
(tracks/inch max)
Areal density
2
(Mbits/inch max)
Performance level
Max. Internal
transfer rate
(Mbits/sec)
Sustained transfer
rate (Mbytes/sec)
I/O data transfer
rate (Mbytes/sec
max)
ST3120020A ST380022A
120
234,441,648 156,301,488 117,231,408
4
2
ST360012A
80 60
512
63
16
16,383
3 2
2 1
542,000
78,000
42,200
5,400 RPM Class
570
27 to 44
100
ST340012A ST330012A
40
78,165,360 58,633,344
2
1
3
30
1
1