SMART Self-test: Reserved (0x80)

Hello 
Could you explain me what does it mean:

SMART Self-test log structure revision number 0
Warning: ATA Specification requires self-test log structure revision number = 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Reserved (0x80)     Aborted by host               60%     42798         -
# 2  Short offline       Completed without error       00%     42787         -
# 3  Short offline       Aborted by host               00%     42763         -

I'm interested about #1 test. what does it mean: Reserved (0x80) ? 
The system was under heavy load, so i had to abort the test.
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