Momentus 5400.3 PSD SATA Product Manual, Rev. A
5
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 refer to the
various models.

2.1 Specification summary tabl e

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 summary
Drive specification ST91608220AS ST91208220AS ST91008220AS ST9808212AS ST9608210AS
Formatted capacity*
(Gbytes@512 bytes/sector) 160 120 100 80 60
Guaranteed sectors (user accessible) 312,581,808 234,441,648 195,371,568 156,301,488 117,210,240
Bytes per sector 512
Physical read/write heads 4 3 3 2 2
Discs 22211
Non-volitile cache (Mbytes) 256
SDRAM buffer (Mbytes) 8
Recording density (bits/inch max) 870k
Track density TPI (tracks/inch max) 150k
Areal density (Gbits/inch2 max) 132
Spindle speed (RPM) 5,400
Internal transfer rate (Mbits/sec max) 352
I/O data transfer rate (Mbytes/sec max) 150
ATA data-transfer modes supported SATA 1.0, Serial ATA Revision 2.5
PIO modes 0–4
Multiword DMA modes 0–2
Ultra DMA modes 0–6
Height (max) 9.5 +/- 0.2 mm (0.374 +/- .0078 inches)
Width (max) 69.85 mm (2.75 +/- 0.0098 inches)
Length (max) 100.50 +/- 0.25 mm (3.957 +/- 0.010 inches)
Weight (typical) 102 grams (0.22 lb) 98 grams (0.216 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.0
Standby to ready (sec typical) 3.0
Track-to-track seek time (msec typical) 1.0 (read), 1.5 (write)
Average seek, read (msec typical) 12.5
Average seek, write (msec typical) 14.0