PORTS Forum

Ports and Interfaces => USB => Topic started by: Jan Axelson on May 22, 2010, 06:25:33 pm

Title: What is UASP for mass storage?
Post by: Jan Axelson on May 22, 2010, 06:25:33 pm

Most current USB mass storage devices use the bulk-only protocol. The protocol requires each SCSI command to complete before the host can issue the next command.

UASP, or USB Attached SCSI Protocol is more efficient because it allows multiple, concurrent commands.

The UASP specification is available here:

http://www.usb.org/developers/devclass_docs

The USB Attached SCSI (UAS) transport protocol specification is available here:

http://www.t10.org/drafts.htm#SCSI3_UAS

Jan

Title: Re: What is UASP for mass storage?
Post by: sainfedl on May 22, 2010, 07:14:20 pm

I am looking for Linux support of UASP.
could you point me to few sites treating the subject matter in a Linux context?
Thank you

Best regards

Jean-Pierre Sainfeld

Title: Re: What is UASP for mass storage?
Post by: Jan Axelson on May 22, 2010, 08:15:21 pm

Here is a discussion about it:

http://kerneltrap.org/mailarchive/linux-usb/2010/4/1/6259877/thread

Jan