Seagate MOMENTUS 42.2 ST9100822A, Product Manual

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Momentus 42.2 Product Manual, Rev. A 3
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
ST9100822A, ST9808210A, ST960821A, ST9402113A, and ST930219A model drives.
2.1 Specification summary
The specifications listed in this table are for quick reference. For details on specification measurement or
definition, see the appropriate section of this manual.
Table 1: Specifications
Drive specification ST9100822A ST9808210A ST960821A ST9402113A ST930219A
Formatted Gbytes (512 bytes/sector) 100 80 60 40 30
Guaranteed sectors 195,371,568 156,301,488 117,210,240 78,140,160 58,605,120
Bytes per sector 512
Physical read/write heads 4 3 3 2 2
Discs 2 2 2 1 1
Cache (Mbytes) 8 2
Recording density, BPI (bits/inch max) 642,000
Track density. TPI (tracks/inch max) 100,780
Areal density (Gbits/inch
2
max) 85
Spindle speed (RPM)
4,200 RPM-Class Performance
(Actual spin speed 5,400 RPM)
Internal data transfer rate OD (Mbytes/sec max) 48.25
Sustained data transfer rate OD (Mbytes/sec) 38.0
I/O data-transfer rate (Mbytes/sec max) 100
ATA data-transfer modes supported PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5
Height 9.5+/–0.2 mm (0.374 +/–.0078 inches)
Width 69.85 +/–0.25 mm (2.75 +/–0.0098 inches)
Length 100.2 +/–0.25 mm (3.945 +/–0.0098 inches)
Weight (typical) 102 grams (0.225 lb)
Average latency (msec) 5.6
Power-on to ready (sec typical) 3.5
Standby to ready (sec typical) 3.0
Startup current 5V (peak) 1.0 amps
Track-to-track seek time (msec typical) 1.5 (read), 2.0 (write)
Average seek time (msec typical) 12.5
Average seek, read (msec typical) 12.5
Average seek, write (msec typical) 14.5
Full-stroke seek (msec) 22 (typical); 26 (max)