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U Series 9 ce Product Manual, Rev. F 5
2.2 Formatted capacity
2.2.1 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.
See Section 4.1.2, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137 Gbytes.
2.3 Default logical geometry
2.4 Physical organization
2.5 Recording and interface technology
Model
Formatted
capacity
Guaranteed
sectors
Bytes per sector
ST3160022ACE 160 Gbytes 312,581,808 512
ST3120025ACE 120 Gbytes 234,441,648 512
ST380012ACE 80 Gbytes 156,301,488 512
Cylinders Read/write heads Sectors per track
16,383 16 63
Model Read/write heads Number of discs
ST3160022ACE 4 2
ST3120025ACE 3 2
ST380012ACE 2 1
Interface ATA
Recording method 16/17 EPRML
Recording density BPI (bits/inch max) 595,000
Track density TPI (tracks/inch max) 94,600
Areal density (Mbits/inch
2
max) 56.3
Internal data-transfer rate OD (Mbytes/sec max) 85.4
Sustained data transfer rate OD (Mbytes/sec max) 48
I/O data-transfer rate (Mbytes/sec max) 100 (Ultra DMA mode 5)
Interleave 1:1
Cache buffer 2 Mbyte (2,048 kbytes)