Hitachi HDS728080PLAT20 Specifications - Page 27
Cylinder allocation - capacity
UPC - 829686000094
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4.4.2 Cylinder allocation Table 4: Cylinder allocation Data Zone 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Physical Cylinders 1,444 3,095 3,095 3,389 3,043 3,845 3,946 4,501 4,001 3,232 3,726 3,193 4,286 3,120 3,093 3,106 4,037 4,073 3,573 3,276 2,675 2,408 1,960 1,568 1,568 2,082 2,157 1,700 1,570 1,521 Blk/Trk 1,170 1,147 1,147 1,134 1,125 1,080 1,080 1,026 1,026 1,012 990 972 945 918 900 877 855 810 810 742 742 720 702 675 675 630 630 607 594 567 Physical cylinder is calculated from the starting data track of 0. It is not relevant to logical CHS. Depending 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 Global Storage Technologies manufacturing and includes data sent from a defect location. Deskstar 7K80 Hard Disk Drive Specification 23