Physical Format; Shipped Format (Plist); Reassigned Format (Glist) - Hitachi HUS151473VL3800 - Ultrastar 73.4 GB Hard Drive Specifications

6.0 Physical format

Media defects are remapped to the next available sector during the Format Process in manufacturing. The mapping from Log-
ical Block Address (LBA) to the physical Block location is calculated using internally maintained tables.

6.1 Shipped format (Plist)

• Data areas are optimally used.
• No extra sector is wasted as a spare throughout user data areas.
• All pushes generated by defects are absorbed by spare tracks of the inner zone.
Plist physical format
Note: Defects are skipped without any constraint, such as track or cylinder boundary. The calculation from LBA to physical
is done automatically by internal table.

6.2 Reassigned format (Glist)

• Glist is prepared for 5000 LBAs.
• Multiple reassignment of the same LBA does not increase the number of Glist entries.
• A cylinder for spare sectors is prepared every 512 physical cylinders.
Figure 1 : Plist physical format
Hitachi Ultrastar 15K147 SCSI Hard Disk Drive Specification
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