Drive Specifications; Specification Summary Table - Seagate LD25 - Series 20 GB Hard Drive Product Manual

2.0

Drive specifications

Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal
power. For convenience, the phrases the drive and this drive are used throughout this manual to indicate the
ST9402115AS and ST920217AS models.
2.1

Specification summary table

The specifications listed in this table are for quick reference. For details on specification measurement or defi-
nition, see the appropriate section of this manual.
Table 1: Drive specifications
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 in BPI (bits/inch max)
Track density TPI (tracks/inch max)
2
Areal density (Gbits/inch max)
Spindle speed (RPM)
Internal transfer rate (Mbytes/sec max)
I/O data transfer rate (Mbytes/sec max)
ATA data-transfer modes supported
Cache buffer (Mbytes)
Height (max)
Width (max)
Length (max)
Weight (typical)
Average latency (msec)
Power-on to ready (sec typical)
Standby to ready (sec typical)
Track-to-track seek time (msec typical)
Average seek, read (msec typical)
LD25 Series SATA Product Manual, Rev. C
ST9402115AS ST920217AS
40 20
82,443,600 41,021,800
512
63
16
16,383
2 1
1 1
675,900
114,000
81
5,400
57.6
150
SATA 1.0, SATA II
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
2
9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
69.85 mm (2.75 +/- 0.0098 inches)
100.5078 +/- 1.57 mm (3.957 +/- 0.062 inches)
100 grams (0.22 lb)
5.6
4.0
3.0
1.0 (read), 1.5 (write)
<16
3