Don't you mean
(drive->id->cfs_enable_1 & 0x0400) word85
and not
(drive->id->command_set_1 & 0x0400) word82
Because when bit 10 of word 85 is not set then clip or HPArea is not enabled.
Cheers,
Andre Hedrick
CTO Timpanogas Research Group
EVP Linux Development, TRG
Linux ATA Development
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