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Hitachi Storage
 
a Western Digital company

Hitachi

Model Number Guide for Hitachi Hard Drives


Hitachi Global Storage introduced a new model numbering system in the 2nd quarter of 2003, starting with the Hitachi Travelstar 7K60, Hitachi Travelstar 5K80, and Hitachi Deskstar 7K250 drives. (Models released before these drives use the previous IBM legacy model numbering system.) The following legend describes the new model numbers:

H F P SP TC MC x Z IF x B x

Where:
H = Hitachi
F =

Product Family:
D = Deskstar
C = CinemaStar
T = Travelstar
U = Ultrastar
M = Microdrive
E = Endurastar

P =

Series prefix:
S= Standard (default, if no series name prefix)
A = ATA in Enterprise
Z = z-height unique to the standard form factor
C = Compact
J/N = Endurastar Temperature Range 
E = Enh. Availability (24x7)
T = Differentiator between two models with the same name (T7K250)

SP =

Speed, expressed in Revolutions Per Minute (rpm):
36 = 3600 rpm
42 = 4200 rpm
5C = CoolSpin
SL = SLC
54 = 5400 rpm
72 = 7200 rpm
10 = 10,000 rpm
15 = 15,000 rpm

TC =

Top capacity available for a particular drive release:
25 = 250GB (first two significant digits)
18 = 180GB
etc...

MC = Model capacity for this specific drive:
25 = 250GB (first two significant digits)
18 = 180GB
etc...
x Unique code
Z =

z-Height:
L = 1" or LEF
S = 15mm or SFF
7 = 7 mm
9 = 9.5 mm
5 = 5 mm
8 = 8 mm

IF

Interface:
16 = Ultra 160, 68 pin  
18 = Ultra 160, 80 pin
36 = Ultra 320, 68 pin
38 = Ultra 320, 80 pin
46 = SAS 6Gb/s with 4K block size
A = ATA/Entry level
A3 = Serial-ATA 3 Gbit / s
A6 = Serial-ATA 6Gb/s (and take the extra spaces out of the A3 line)
AT = ATA
CA = CE-ATA 
CE = ATA (ZIF Connector)
CF = CF2 pin 
CM = ATA on MMC
E3 = SATA 3Gb/s with 4K block size running 512 emulation
F2 = Fibre channel 2GB
F4 = Fibre channel 4GB
N3 = SATA 3Gb/s with 4K block size native
S3 = SAS 3Gb/s
S6 = SAS 6Gb/s
SA = Serial-ATA 1,5 GB /s
SS = Serial-attached SCSI

B = Feature Code assigned by business unit (e.g., cache buffer size)
x Unique code
 
Example: 
HDS722516VLAT20 - Hitachi Deskstar 7K250:

H = Hitachi
D = Deskstar
S = Standard
72 = 7200 rpm
25 = 250GB full pop capacity
16 = Unique model code
V = Unique code
L = 1" form factor
AT = ATA
2 = Feature code (representing 2MB cache)
0 = Unique code