Well, I finally found some workaround to that problem. I figured that the problem is with the USB bridge. It appears that the kernel can't deal this bridge. Maybe because it is a USB 3.0 SuperSpeed or it something to do with the ASMEDIA ASM1051 chip.
Two LUN are recognized but the HDD LUN is reported to be disconnected (that the meaning of 'PQ:1' in: [...] [ 233.579036] scsi 6:0:0:0: Direct-Access USB3.0 D Super Speed Mass 0 PQ: 1 ANSI: 0 [...] I found some 'hardware' work arround to that problem. I bought an other USB HDD enclosure (only 5$ ...) but I made sure it uses USB 2.0. I moved the toshiba HDD into the new enclosure and everything is OK. Even the transfer speed is not so bad. I believe that this bug should be treated in the frame of 'usb_storage' module but this is far beyond my knowledge. If there is way I can contribute to the solution of this bug, let me know. Best Regards Ido Halperin -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org