Description of problem: I have this USB 3.0 external drive: Bus 004 Device 002: ID 1058:1130 Western Digital Technologies, Inc. It is plugged into a USB 3.0 port on my new Z87 based motherboard (asus sabertooth z87). The drive is never recognized when I reboot the system. If I unplug the power and plug it back in after the system is up, the drive shows up again, and this appears in dmesg: [ 97.829119] usb 4-6: new SuperSpeed USB device number 2 using xhci_hcd [ 97.841009] usb 4-6: New USB device found, idVendor=1058, idProduct=1130 [ 97.841017] usb 4-6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 97.841023] usb 4-6: Product: My Book 1130 [ 97.841027] usb 4-6: Manufacturer: Western Digital [ 97.841030] usb 4-6: SerialNumber: 574341563550333436303533 [ 97.842380] scsi11 : usb-storage 4-6:1.0 [ 99.828852] scsi 11:0:0:0: Direct-Access WD My Book 1130 1012 PQ: 0 ANSI: 6 [ 99.829194] scsi 11:0:0:1: Enclosure WD SES Device 1012 PQ: 0 ANSI: 6 [ 99.829440] sd 11:0:0:0: Attached scsi generic sg6 type 0 [ 99.829566] scsi 11:0:0:1: Attached scsi generic sg7 type 13 [ 109.656369] sd 11:0:0:0: [sdf] 1953458176 512-byte logical blocks: (1.00 TB/931 GiB) [ 109.656613] sd 11:0:0:0: [sdf] Write Protect is off [ 109.656616] sd 11:0:0:0: [sdf] Mode Sense: 47 00 10 08 [ 109.656840] sd 11:0:0:0: [sdf] No Caching mode page present [ 109.656842] sd 11:0:0:0: [sdf] Assuming drive cache: write through [ 109.657876] sd 11:0:0:0: [sdf] No Caching mode page present [ 109.657877] sd 11:0:0:0: [sdf] Assuming drive cache: write through [ 109.663364] sdf: sdf1 [ 109.664605] sd 11:0:0:0: [sdf] No Caching mode page present [ 109.664606] sd 11:0:0:0: [sdf] Assuming drive cache: write through [ 109.664607] sd 11:0:0:0: [sdf] Attached SCSI disk [ 109.664849] ses 11:0:0:1: Attached Enclosure device I have read about a bug with USB 3.0 driver and the early Z87 chipset (which I must have since the fixed chips aren't due till July), but this doesn't seem like that bug since I never suspend the system (unless maybe rebooting passes through the same sleep state for some reason), so I thought there might actually be a kernel bug in the new Z87 chipset support code and figured I'd report it. Version-Release number of selected component (if applicable): kernel-3.9.6-200.fc18.x86_64 How reproducible: Every time I reboot, the disk has utterly vanished till I power cycle it and then it looks like it was just plugged in. Steps to Reproduce: 1.see above 2. 3. Actual results: No disk device shows up at all Expected results: Disk device shows up. Additional info:
Created attachment 763871 [details] Complete dmesg output after power cycling disk drive
Created attachment 763872 [details] Complete /var/log/message from start of last boot
Just tried an experiment: I shutdown my computer. I power cycled the USB 3.0 disk drive. I powered the computer back up. Result: The drive was visible when the system booted. So this does seem like something the system does to the drive on the way down (which also seems a lot like the Z87 hardware bug), but maybe there is some way to avoid telling the USB disks to go to sleep when I know I'm rebooting?
OK, advice I got over on an intel forum to update the external drive's firmware seems to have fixed this, so I guess it is not a bug in the kernel.