Momentus XT Product Manual, Rev. D 7

3.3 Default logical geometry
Cylinders Read/write heads Sectors per track
16,383 16 63

LBA mode

When addressing these drives in LBA mode, all blocks (sectors) are consecutively numbered from 0 to n–1,

where n is the number of guaranteed sectors as defined above.

3.4 Physical organization
Drive model Read/write heads Number of discs
750GB 4 2
500GB
3.5 Recording and interface technology
Interface Serial ATA (SATA)
Recording method Perpendicular
Recording density BPI (bits/in max) 1778k
Track density TPI (tracks/in max) 317k
Areal density (Gb/in2 max) 563.6
Spindle speed (RPM) (± 0.2%) 7200
Maximum Internal transfer rate (Gb/s) 1.23
I/O data-transfer rate (Gb/s max) 6.0
Interleave 1:1
Cache buffer - ST750LX003 and ST500LX003 32MB (32,768KB)
3.6 Physical characteristics
Drive specification
Height (mm)
(in) 9.50 ± 0.20
0.370 ± 0.008
Width (mm)
(in) 69.85 ± 0.25
2.750 ± 0.010
Length (mm)
(in) 100.30 ± 0.25
3.949 ± 0.010
Typical weight 115 g
0.253 lb