Seagate ST1000NM0011 Default Logical Geometry, Recording and Interface Technology, Seek Time

2.3DEFAULT 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.

2.4RECORDING AND INTERFACE TECHNOLOGY

Interface	Serial ATA (SATA)
Recording method	Perpendicular
Recording density, KBPI (Kb/in max)	1523
Track density, KTPI (ktracks/in avg)	237
Areal density (Gb/in2 avg)	324
Spindle speed (RPM) (± 0.2%)	7200
Internal data transfer rate (Mb/s max)	1300
Sustained data transfer rate (MB/s max)	152
I/O data-transfer rate (MB/s max)	600 (Ultra DMA mode 5)

2.5PHYSICAL CHARACTERISTICS

Weight: (maximum)
2TB models	710g (1.565 lb)
1TB models	640g (1.411 lb)
500GB models	610g (1.345 lb)
Cache buffer	64MB (64,768KB)

2.6SEEK TIME

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:

•Track-to-track seek time is an average of all possible single-track seeks in both directions.

•Average seek time is a true statistical random average of at least 5000 measurements of seeks between random tracks, less overhead.

Table 2:

*Typical seek times (ms)	Read	Write
Track-to-track	0.5	0.8
Average	<8.5	<9.5
Average latency:	4.16

*Measured in performance mode.

Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted values. However, due to the manner in which these drives are formatted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

CONSTELLATION ES SERIAL ATA PRODUCT MANUAL, REV. F 6