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4.3 Drive organization
4.3.1 Drive format
Upon shipment from Hitachi Globals Storage Technologies manufacturing the drive satisfies the sector
continuity in the physical format by means of the defect flagging strategy described in Section 5.0 on
page 19 in order to provide the maximum performance to users.
4.3.2 Cylinder allocation
All models except optimized 40GB
Data
Physical Cylinders
Zone
0
0-1151
1
1152-5632
2
5633-9224
3
9225-12708
4
12709-16480
5
16481-18512
6
18513-21897
7
21898-23814
8
23815-27236
9
27237-29206
10
29207-32323
11
32324-34809
12
34810-38627
13
38628-40977
14
40978-43213
15
43214-46330
16
46331-47268
17
47269-50076
18
50077-50933
19
50934-54001
20
54002-57061
21
57062-59297
22
59298-61137
23
61138-63890
24
63891-66189
25
66190-68724
26
68725-70552
Figure 3. Cylinder allocation
Physical cylinder is calculated from the starting data track of 0. It is not relevant to logical CHS. Depend-
ing on the capacity some of the inner zone cylinders are not allocated.
Data cylinder
This cylinder contains the user data which can be sent and retrieved via read/write commands and a
spare area for reassigned data.
Spare cylinder
The spare cylinder is used by Hitachi Globobal Storage Technologies manufacturing and includes data
sent from a defect location.
Blk/Trk
1,092
1,071
1,050
1,050
1,008
997
980
966
945
924
910
892
861
840
840
798
787
770
756
735
700
672
651
630
588
560
536
Deskstar 180GXP hard disk drive specifications
11
Optimized 40GB model
Physical Cylinders
0 - 1010
1011-3262
3263-6101
6102-8098
8099-10150
10151-12157
12158-14453
14454-16913
16914-19093
19094-21116
21117-23091
23092-25371
25372-27587
27588-29280
29281-30884
30885-32135
32136-33866
33867-35554
35555-37014
37015-38443
38444-40044
40045-41606
41607-42683
42684-43740
43741-45380
45381-47025
47026-48622
Blk/Trk
1,008
997
980
966
945
945
924
910
892
861
861
840
840
798
798
787
756
756
735
735
700
700
672
672
651
630
630
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