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6.2 Maintenance Information
C141-E198 6-9
6.2.4 Revision numbers
The revision number of the disk drive is represented with a letter and a number indicated on the
revision label attached to the DE. Figure 6.1 shows the revision label format.
Figure 6.1 Revision label (example)
(1) Indicating revision number at factory shipment
When the disk drive is shipped from the factory, the revision number is indicated by deleting
numbers in the corresponding letter line up to the corresponding number with = (see Figure 6.2).
(2) Changing revision number in the field
To change the revision number because parts are replaced or other modification is applied in the
field, the new level is indicated by enclosing the corresponding number in the corresponding letter
line with ¡ (see Figure 6.2).