XL500S
Specifications
2679-701211-A06
RELEASED 10/21/10 (WD CONFIDENTIAL)
5
2.2
Physical Specifications
Physical Specifications
1,2
WD5000AAKX
WD5000AAKS
WD3200AAKX
WD2500AAKX
Capacity
500,107 MB
320,072
MB
250,059 MB
Interface
SATA 6 Gb/s (AAKX)
SATA 3 Gb/s (AAKS)
SATA 6 Gb/s
SATA 6 Gb/s
Number of Disks
1
1
1
Data Surfaces
2
2
1
Number of Heads
2
2
1
Bytes per Sector
512
512
512
User Sectors per Drive
976,773,168
625,142,448
488,397,168
Servo Type
Embedded
Embedded
Embedded
Recording Method EPR4
Rate 16/17 PRML
Rate 16/17 PRML
Rate 16/17 PRML
ECC
Reed-Solomon
Reed-Solomon
Reed-Solomon
Head Park
2
Automatic
Automatic
Automatic
PRML - Partial Response Maximum Likelihood
1
Specifications represented are of a typical production drive and may be subject to change or variation without
notice.
2
As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and
one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As
used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte
per second (MB/s) = one million bytes per second, and gigabit per second (Gb/s) = one billion bits per second.
Effective maximum SATA 3 Gb/s transfer rate calculated according to the Serial ATA specification published by the
SATA-IO organization as of the date of this specification sheet. Visit www.sata-io.org for details.
3
Turning off the system power causes the drive to perform an automatic head park operation.
