https://bugzilla.kernel.org/show_bug.cgi?id=89511 --- Comment #3 from Jun Itou <itou_jun@xxxxxxxxxxx> --- Because it occurs in Debian7.7 and Fedora20, I think this symptom to be a problem of kernel. I confirm that I do the same operation in the following devices and reappear. I-O DATA HDZ-UE2.0TS I-O DATA HDZ-UE1.0TS I-O DATA HDZ-UE1.0TS I-O DATA HDW-UE I was as follows in Fedora20. [root@localhost ~]# uname -a Linux localhost.localdomain 3.17.4-200.fc20.i686+PAE #1 SMP Fri Nov 21 23:45:26 UTC 2014 i686 i686 i386 GNU/Linux [root@localhost ~]# fdisk /dev/sdc Welcome to fdisk (util-linux 2.24.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. コマンド (m でヘルプ): p Disk /dev/sdc: 931.5 GiB, 1000215724032 bytes, 1953546336 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x79ccabc6 デバイス ブート Start 最後から Blocks Id System /dev/sdc1 2048 1953546335 976772144 83 Linux コマンド (m でヘルプ): d Selected partition 1 Partition 1 has been deleted. コマンド (m でヘルプ): p Disk /dev/sdc: 931.5 GiB, 1000215724032 bytes, 1953546336 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x79ccabc6 コマンド (m でヘルプ): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): Using default response p. パーティション番号 (1-4, default 1): First sector (2048-1953546335, default 2048): Last sector, +sectors or +size{K,M,G,T,P} (2048-1953546335, default 1953546335): Created a new partition 1 of type 'Linux' and of size 931.5 GiB. コマンド (m でヘルプ): p Disk /dev/sdc: 931.5 GiB, 1000215724032 bytes, 1953546336 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x79ccabc6 デバイス ブート Start 最後から Blocks Id System /dev/sdc1 2048 1953546335 976772144 83 Linux コマンド (m でヘルプ): w The partition table has been altered. Calling ioctl() to re-read partition table. /dev/sdc: close device failed: 遠隔I/Oエラーです [root@localhost ~]# dmesg [11378.635292] sdb: sdb1 [11378.644515] end_request: critical target error, dev sdb, sector 0 [11505.048965] sdc: sdc1 [11505.070962] end_request: critical target error, dev sdc, sector 0 [12323.199222] usb 1-2: USB disconnect, device number 3 [12323.204864] sd 4:0:0:0: [sdc] Synchronizing SCSI cache [12323.204969] sd 4:0:0:0: [sdc] [12323.205036] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [12328.983064] usb 1-2: new high-speed USB device number 4 using ehci-pci [12329.254305] usb 1-2: New USB device found, idVendor=04bb, idProduct=0106 [12329.254310] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [12329.254312] usb 1-2: Product: I-O DATA HDW-UE [12329.254317] usb 1-2: Manufacturer: I-O DATA DEVICE,INC. [12329.254319] usb 1-2: SerialNumber: 0000000015B4 [12329.256556] usb-storage 1-2:1.0: USB Mass Storage device detected [12329.256668] scsi host5: usb-storage 1-2:1.0 [12330.306516] usb 1-1: USB disconnect, device number 2 [12330.311660] sd 3:0:0:0: [sdb] Synchronizing SCSI cache [12330.311947] sd 3:0:0:0: [sdb] [12330.311959] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [12335.938510] usb 1-1: new high-speed USB device number 5 using ehci-pci [12336.197402] usb 1-1: New USB device found, idVendor=04bb, idProduct=0109 [12336.197408] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [12336.197411] usb 1-1: Product: I-O DATA HDZ-UES [12336.197413] usb 1-1: Manufacturer: I-O DATA DEVICE INC. [12336.197416] usb 1-1: SerialNumber: 0000000042A4 [12336.200728] usb-storage 1-1:1.0: USB Mass Storage device detected [12336.202401] scsi host6: usb-storage 1-1:1.0 [12338.413255] scsi 5:0:0:0: Direct-Access I-O DATA HDW-UE 0100 PQ: 0 ANSI: 2 [12338.414954] sd 5:0:0:0: Attached scsi generic sg2 type 0 [12338.418619] sd 5:0:0:0: [sdb] 1953546336 512-byte logical blocks: (1.00 TB/931 GiB) [12338.424650] sd 5:0:0:0: [sdb] Write Protect is off [12338.424654] sd 5:0:0:0: [sdb] Mode Sense: 53 00 00 08 [12338.430284] sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [12338.457232] sdb: sdb1 [12338.476721] sd 5:0:0:0: [sdb] Attached SCSI disk [12338.739881] scsi 6:0:0:0: Direct-Access I-O DATA HDZ-UE1.0TS 6706 PQ: 0 ANSI: 0 CCS [12338.740452] sd 6:0:0:0: Attached scsi generic sg3 type 0 [12338.743802] sd 6:0:0:0: [sdc] 1953588672 512-byte logical blocks: (1.00 TB/931 GiB) [12338.750306] sd 6:0:0:0: [sdc] Write Protect is off [12338.750310] sd 6:0:0:0: [sdc] Mode Sense: 34 00 00 00 [12338.757360] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [12338.786386] sdc: sdc1 [12338.807891] sd 6:0:0:0: [sdc] Attached SCSI disk [root@localhost ~]# unamae -a Linux localhost.localdomain 3.17.4-200.fc20.i686+PAE #1 SMP Fri Nov 21 23:45:26 UTC 2014 i686 i686 i386 GNU/Linux [root@localhost ~]# halt -- You are receiving this mail because: You are watching the assignee of the bug.-- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
