Verify first write to each storage area of hard disk drive

A non-transitory machine-readable medium storing one or more sequences of instructions which, when executed by one or more processors, cause performance of:

• in a hard disk drive (HDD) for which disk defects are not previously identified, and responsive to a first user data write request to a particular storage area of a disk medium, the first user data write request being an initial request directed at the particular storage area to which no other previous user data write request has been directed:
• writing the user data to the particular storage area;
• reading the written user data from the particular storage area;
• and
• verifying the integrity of the user data read from the particular storage area.

A data storage device (DSD) comprising:

• means for executing machine-executable instructions;
• and
• means for storing one or more sequences of machine-executable instructions which, when executed by the means for executing machine-executable instructions, cause performance of:
• responsive to a first user data write request to a particular storage area of a disk medium of the DSD, the first user data write request being an initial request directed at the particular storage area to which no other previous user data write request has been directed:
• writing the user data to the particular storage area,
• reading the written user data from the particular storage area, and
• verifying the integrity of the user data read from the particular storage area.