Re: need UASP/UAS spec
Am Montag, den 12.03.2018, 12:09 +0530 schrieb Tushar Nimkar: > Hi, > Can u please help me in getting UAS spec.? > I have "UASP Revision 1.0" but which is very old. > > Want to understand what this "uas-tags"/ "initiator transfer tags" mean. > For only one case transfer (Command IU) it is 0x0002 rest case it is 0x0001 > > Please provide any link so that I can download spec. > Any help on "tags" is welcome. Hi, UAS in contrast to usb-storage can operate multiple SCSI commands at the same time. Therefore the host and the device must have a way to identify commands so that status and error reports can be attributed to the correct command. The way to do that is the tag, which is basically just a number the host assigns to a command. The range of tags you use is determined by the number of streams that are supported, so that each tag can be linked to a stream, meaning that data transfers are independent of each other. HTH Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: need UASP/UAS spec
On Mon, Mar 12, 2018 at 12:09:31PM +0530, Tushar Nimkar wrote: > Hi, > Can u please help me in getting UAS spec.? > I have "UASP Revision 1.0" but which is very old. > > Want to understand what this "uas-tags"/ "initiator transfer tags" mean. > For only one case transfer (Command IU) it is 0x0002 rest case it is 0x0001 > > Please provide any link so that I can download spec. All public USB specs can be found at http://www.usb.org/developers/docs/ Hope this helps, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
need UASP/UAS spec
Hi, Can u please help me in getting UAS spec.? I have "UASP Revision 1.0" but which is very old. Want to understand what this "uas-tags"/ "initiator transfer tags" mean. For only one case transfer (Command IU) it is 0x0002 rest case it is 0x0001 Please provide any link so that I can download spec. Any help on "tags" is welcome. -- Best Regards, Tushar R Nimkar Mob No : +91-9052258800 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
