i have random usb harddisk disconnects too. what i'm seeing is when i copy several GB of data to it, it will stop working after a while (several minutes), show this in the /var/log/messages:
May 30 08:56:21 eeepc kernel: [28603.462424] usb 1-3: USB disconnect, address 66 May 30 08:56:28 eeepc kernel: [28610.304144] usb 1-3: new high speed USB device using ehci_hcd and address 67 May 30 08:56:28 eeepc kernel: [28610.449760] usb 1-3: configuration #1 chosen from 1 choice May 30 08:56:28 eeepc kernel: [28610.452094] scsi49 : SCSI emulation for USB Mass Storage devices May 30 08:56:33 eeepc kernel: [28615.452975] scsi 49:0:0:0: Direct-Access SAMSUNG HM250JI PQ: 0 ANSI: 2 CCS May 30 08:56:33 eeepc kernel: [28615.457023] sd 49:0:0:0: Attached scsi generic sg2 type 0 May 30 08:56:33 eeepc kernel: [28615.468424] sd 49:0:0:0: [sdaf] 488397168 512-byte logical blocks: (250 GB/232 GiB) May 30 08:56:33 eeepc kernel: [28615.470035] sd 49:0:0:0: [sdaf] Write Protect is off May 30 08:56:33 eeepc kernel: [28615.471819] sdaf: sdaf1 May 30 08:56:33 eeepc kernel: [28616.155880] sd 49:0:0:0: [sdaf] Attached SCSI disk May 30 09:07:47 eeepc kernel: [29289.325424] usb 1-3: USB disconnect, address 67 May 30 09:07:53 eeepc kernel: [29295.813083] usb 1-3: new high speed USB device using ehci_hcd and address 68 May 30 09:07:53 eeepc kernel: [29295.961819] usb 1-3: configuration #1 chosen from 1 choice May 30 09:07:53 eeepc kernel: [29295.962887] scsi50 : SCSI emulation for USB Mass Storage devices May 30 09:07:58 eeepc kernel: [29300.961156] scsi 50:0:0:0: Direct-Access SAMSUNG HM250JI PQ: 0 ANSI: 2 CCS May 30 09:07:58 eeepc kernel: [29300.969111] sd 50:0:0:0: Attached scsi generic sg2 type 0 May 30 09:07:58 eeepc kernel: [29300.970691] sd 50:0:0:0: [sdag] 488397168 512-byte logical blocks: (250 GB/232 GiB) May 30 09:07:58 eeepc kernel: [29300.971556] sd 50:0:0:0: [sdag] Write Protect is off May 30 09:07:59 eeepc kernel: [29300.973984] sdag: sdag1 May 30 09:07:59 eeepc kernel: [29301.576354] sd 50:0:0:0: [sdag] Attached SCSI disk May 30 09:08:31 eeepc kernel: [29333.974797] usb 1-3: USB disconnect, address 68 May 30 09:08:48 eeepc kernel: [29350.240135] usb 1-3: new high speed USB device using ehci_hcd and address 69 May 30 09:08:48 eeepc kernel: [29350.600147] usb 1-3: new high speed USB device using ehci_hcd and address 70 May 30 09:08:48 eeepc kernel: [29350.742977] usb 1-3: configuration #1 chosen from 1 choice May 30 09:08:48 eeepc kernel: [29350.745284] scsi51 : SCSI emulation for USB Mass Storage devices May 30 09:08:48 eeepc kernel: [29350.894418] usb 1-3: USB disconnect, address 70 May 30 09:08:56 eeepc kernel: [29358.756137] usb 1-3: new high speed USB device using ehci_hcd and address 71 May 30 09:08:56 eeepc kernel: [29358.905855] usb 1-3: configuration #1 chosen from 1 choice May 30 09:08:56 eeepc kernel: [29358.908400] scsi52 : SCSI emulation for USB Mass Storage devices May 30 09:09:01 eeepc kernel: [29363.909172] scsi 52:0:0:0: Direct-Access SAMSUNG HM250JI PQ: 0 ANSI: 2 CCS May 30 09:09:01 eeepc kernel: [29363.920525] sd 52:0:0:0: Attached scsi generic sg2 type 0 May 30 09:09:01 eeepc kernel: [29363.922779] sd 52:0:0:0: [sdah] 488397168 512-byte logical blocks: (250 GB/232 GiB) May 30 09:09:01 eeepc kernel: [29363.923934] sd 52:0:0:0: [sdah] Write Protect is off May 30 09:09:02 eeepc kernel: [29363.925800] sdah: sdah1 May 30 09:09:02 eeepc kernel: [29364.606965] sd 52:0:0:0: [sdah] Attached SCSI disk and mount the disk under a new mountpoint under /media with an additional underscore. the above log is somewhere in the middle of a large amount of disconnects/reconnects; it show the partition (/dev/sdc1) as sdaf1. i think is is a USB driver bug since i never had this problem with 9.10. it's not just harddisks though. i also have usb remote controls that when plugged in, crash the usb driver and even the whole system sometimes (reproducible, no log messages, never happend in 9.10). i dont know if i should report that as another bug as it's most likely due to the usb driver. -- external USB hard drive disconnects https://bugs.launchpad.net/bugs/349767 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
