ATA_PORT_F_READLOG
at->at_features &= ~ATA_PORT_F_READLOG;
ccb_at->at_features |= ATA_PORT_F_READLOG;
if (at->at_features & ATA_PORT_F_READLOG) {
at->at_features &= ~ATA_PORT_F_READLOG;
at->at_features &= ~ATA_PORT_F_READLOG;