sg_utils identify_device and read/write buffer commands

pheebs · 06-17-2011, 03:46 PM

Hi

I used sg_sata_ident to get the IDENTIFY_DEVICE output on my SATA drive. The output shows the drive as being able to support READ_BUFFER/WRITE_BUFFER. However, when I issue sg_read_buffer /dev/sda, I get an error - DRIVER_SENSE - Invalid command operation supported.

What does this indicate?

smallpond · 06-20-2011, 03:21 PM

sg_read_buffer sends a SCSI read buffer command. I don't think that's the same as a SATA read buffer.