I have a Seagate ST3000DM 3.0TB Sata Drive enclosed in a Vantec NexStar CX USB 3.0/2.0 Enclosure. This enclosure/drive is not properly recognized by Linux when plugged in via a USB 2.0 port. My dmesg output, at first, seems like all is well. but then the drive activity light starts flashing rapidly and never stops. After 20-30 seconds I see a "reset high-speed USB device" message. The /dev/sdx device node is created for the drive, but no sdxN nodes are created and any program accessing the /dev/sdx node hangs. I have tried this drive with 3 different computers all running Ubuntu 12.04 (kernel 3.2.0-30-generic-pae) or Ubuntu 11.10 (kernel 3.0.0-12). I have also tried the 3.7.0-rc4-next kernel. The problem persists on all of the above kernels. It is worth noting that the drive is properly recognized by Windows 7 running on the same hardware as my Ubuntu install. I am providing some output that I hope is useful for diagnosing the problem. I can collect more if needed. I can also provide the raw tcpdump capture file as saved by Wireshark. I don't understand much of the trace I collected, but it seems to get interesting around Frame 108: URB status: Remote I/O error (-EREMOTEIO) (-121). dmesg output: [ 539.974012] usb 1-1.2: new high-speed USB device number 4 using ehci_hcd [ 540.180756] scsi9 : usb-storage 1-1.2:1.0 [ 549.993339] scsi 9:0:0:0: Direct-Access ST3000DM 001-9YN166 CC4H PQ: 0 ANSI: 0 [ 549.994107] sd 9:0:0:0: Attached scsi generic sg3 type 0 [ 549.994666] sd 9:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16). [ 549.995373] sd 9:0:0:0: [sdc] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB) [ 549.996160] sd 9:0:0:0: [sdc] Write Protect is off [ 549.996163] sd 9:0:0:0: [sdc] Mode Sense: 23 00 00 00 [ 549.996963] sd 9:0:0:0: [sdc] No Caching mode page present [ 549.996966] sd 9:0:0:0: [sdc] Assuming drive cache: write through [ 549.997688] sd 9:0:0:0: [sdc] Very big device. Trying to use READ CAPACITY(16). [ 549.999846] sd 9:0:0:0: [sdc] No Caching mode page present [ 549.999851] sd 9:0:0:0: [sdc] Assuming drive cache: write through [ 580.341780] usb 1-1.2: reset high-speed USB device number 4 using ehci_hcd [ 611.396191] usb 1-1.2: reset high-speed USB device number 4 using ehci_hcd [ 642.330917] usb 1-1.2: reset high-speed USB device number 4 using ehci_hcd [ 673.249701] usb 1-1.2: reset high-speed USB device number 4 using ehci_hcd [ 704.176488] usb 1-1.2: reset high-speed USB device number 4 using ehci_hcd Wireshark trace converted to text: http://pastebin.com/aF845HY2 lsusb -vv output for affected enclosure: http://pastebin.com/rcLtzx7e -- - Jason J. Herne (hernejj@xxxxxxxxx) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
