Hi, I had a utility which uses SG_IO ioctl (scsi passthrough?) to issue private commands to a USB dongle (reported as a USB Mass Storage but with 0 bytes) to get some information back. It works fine with kernel 2.6.12.2. But after we upgraded to kernel 2.6.15.4 then the program could not get information back anymore (reads all 0 with the private command). Can anyone please give me a hint of where I should go studying more? Thanks, Ken -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.409 / Virus Database: 268.15.26/594 - Release Date: 12/20/2006 - To unsubscribe from this list: 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