Jeff Garzik wrote: > James Bottomley wrote: >> This really doesn't look correct. What you want is a sata transport >> class with a max command length in the host device. > > Christoph Hellwig wrote: >> this sounds wrong to me. cdb length is a limitation of the host (driver). >> A target will reject unknown commands, no matter what length they have. > > > In practice, CDB length may be limited by both the host and the device. > This applies to ATAPI, and some USB storage too IIRC. For ATAPI, you > read the CDB length from the device's IDENTIFY PACKET DEVICE info page. So the question remains, do we need to police the CDB length on a per device basis, or is a per host basis ok? Will we have ATAPI devices falling on the floor if they get sent too large of a cdb? Brian -- Brian King eServer Storage I/O IBM Linux Technology Center - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
