USBTrace : Class Decoding : Mass Storage

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MSD

USB devices which belong to the Mass Storage Device class can be monitored using the Mass Storage class decoder (Plug-in dll). The decoder can be used to monitor mass storage devices which supports the Bulk-Only Transport protocol.

Both Command Block Wrapper (CBW) & Command Status Wrapper (CSW) of Bulk-Only protocol are decoded and displayed.

The following Command Block Specifications (based on SubClass codes) are supported :

  • SCSI Primary Command Set 3 (SPC3)
  • SCSI Multimeda Command Set 5 (MMC5)
  • SCSI Reduced Block Command Set (RBC)


Image below shows a SCSI Inquiry command block, decoded and displayed by USBTrace.

Mass Storage Class Decoding