Seagate ST1000LM014 Momentus XT Product Manual - Page 11

Formatted capacity, Default logical geometry - firmware

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2.2 Formatted capacity Model ST95005620AS ST93205620AS ST92505610AS Formatted capacity* 500GB 320GB 250GB Guaranteed sectors 976,773,168 625,142,448 488,397,168 Bytes per sector 512 512 512 *One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment and formatting. 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 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48bit addressing support of drives with capacities over 137GB. 2.2.2 Solid State Hybrid feature The Solid State Hybrid feature utilizes the addition of NAND Flash memory to enhance the performance of the drive. Short random accesses to the NAND Flash are faster than disc accesses due to the elimination of seek and rotational latencies and therefore it is used to store more frequently accessed data. The Momentus XT uses a proprietary algorithm which monitors drive activity and determines the optimum data to maintain in the NAND Flash for peak responsiveness. The Solid State Hybrid feature is self contained in the drive firmware and functions independent of the host hardware or operating system. There are no special host system requirements. Momentus XT can be installed in any standard SATA environment and will automatically optimize. Specifics of the Solid State Hybrid Feature: • Powerful ECC correction on data read from the NAND Flash. • Maintains a list of defective NAND Flash blocks and maps them out of use. • Additional bad blocks added during use will be added to the list of defective blocks and taken out of use. • Storage functionality is preserved with no data loss with any wear out of the NAND Flash. • No user intervention required. 2.3 Default logical geometry Cylinders 16,383 Read/write heads 16 Sectors per track 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. Momentus XT Product Manual, Rev. B 5

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Momentus XT Product Manual, Rev. B
5
2.2
Formatted capacity
Model
Formatted capacity*
Guaranteed sectors
Bytes per sector
ST95005620AS
500GB
976,773,168
512
ST93205620AS
320GB
625,142,448
512
ST92505610AS
250GB
488,397,168
512
*One GB equals one billion bytes when referring to hard drive capacity. Accessible capacity may vary depending on operating environment
and formatting.
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 4.3.1, "Identify Device command" (words 60-61 and 100-103) for additional information about 48-
bit addressing support of drives with capacities over 137GB.
2.2.2
Solid State Hybrid feature
The Solid State Hybrid feature utilizes the addition of NAND Flash memory to enhance the performance of the
drive. Short random accesses to the NAND Flash are faster than disc accesses due to the elimination of seek
and rotational latencies and therefore it is used to store more frequently accessed data. The Momentus XT
uses a proprietary algorithm which monitors drive activity and determines the optimum data to maintain in the
NAND Flash for peak responsiveness. The Solid State Hybrid feature is self contained in the drive firmware
and functions independent of the host hardware or operating system. There are no special host system
requirements. Momentus XT can be installed in any standard SATA environment and will automatically opti-
mize.
Specifics of the Solid State Hybrid Feature:
•
Powerful ECC correction on data read from the NAND Flash.
•
Maintains a list of defective NAND Flash blocks and maps them out of use.
•
Additional bad blocks added during use will be added to the list of defective blocks and taken out of use.
•
Storage functionality is preserved with no data loss with any wear out of the NAND Flash.
•
No user intervention required.
2.3
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
.