On Tuesday 13 Jan 2009 21:20:48 Milan Broz wrote: > Ritesh Raj Sarraf wrote: > > I'm using dm-crypt on an external USB enclosure ide hdd. I copied 20Gb of > > data on to the encrypted device and am suffering severe performance > > penalty. After a couple of seconds, all processes involved in the I/O > > keep stalling. They periodically resume, just for a couple of seconds and > > then again stall. > > > > Running linux 2.6.26. > > Please can you try it without dm-crypt involved? > Just copy 20Gb to your unencrypted disk attached through USB. > > I saw this problem with plain USB attached storage some time ago too. > > There is only one thread in dm-crypt and it is waiting for io_schedule, > so I think it is not dm-crypt who is blocking it, but the layer > below the dm-crypt. So I tried the following. Copied 20Gb of data to a partition on the External USB disk. Here are the results: ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 11 10 0 79 0 1| 22M 39M|2864B 2454B| 0 0 |2048 3793 12 9 1 76 0 1| 23M 39M| 81k 8686B| 0 0 |2166 3635 13 8 16 62 0 1| 27M 43M| 12k 5036B| 0 0 |2127 3526 14 8 37 40 0 1| 24M 42M|7138B 5140B| 0 0 |2047 3415 7 8 47 36 0 0| 35M 40M|2451B 2538B| 0 0 |2002 3179 4 9 49 37 0 0| 41M 40M|4081B 276B| 0 0 |1974 2956 1 9 50 38 0 1| 40M 40M| 0 276B| 0 0 |1912 2774 1 8 50 39 0 1| 40M 40M| 92B 0 | 0 0 |2018 2958 2 9 48 39 0 0| 44M 40M| 362B 276B| 0 0 |2097 3191 8 8 45 38 0 1| 27M 33M| 23k 4181B| 0 0 |1919 3009 8 8 50 34 0 0| 31M 26M| 10k 2570B| 0 0 |1760 2724 21 11 33 30 0 3| 40M 40M| 204k 17k| 0 0 |2360 3845 13 8 43 36 0 0| 35M 39M| 12k 5354B| 0 0 |2083 3349 16 8 41 35 0 0| 30M 35M|5738B 4158B| 0 0 |1904 3118 8 10 47 33 0 1| 40M 37M|1718B 1255B| 0 0 |1932 3130 3 9 49 39 0 1| 40M 40M| 0 0 | 0 0 |2124 3065 4 9 46 41 0 0| 40M 40M| 0 0 | 0 0 |1971 3088 6 9 46 40 0 0| 40M 41M| 850B 723B| 0 0 |2059 3155 3 10 46 39 0 1| 40M 42M|1958B 1651B| 0 0 |2054 3217 8 12 41 38 0 1| 41M 39M|2741B 1342B| 0 0 |2083 3647 4 8 47 40 0 0| 39M 39M|2062B 1299B| 0 0 |2060 3328 Looks good. Then I tried copying 20Gb of data to the dm-crypted partition on the same USB disk. Here are the results: ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 3 28 0 67 0 1| 20M 41M| 0 0 | 0 0 |1972 3036 25 29 0 44 0 2| 39M 42M| 0 78B| 52k 0 |1800 3612 41 22 0 35 0 1|8952k 40M| 54B 65B| 0 0 |1493 3471 21 24 0 54 0 1|2040k 42M|1469B 1591B| 0 0 |2180 5170 16 24 0 59 0 1| 14M 44M| 25k 4962B| 0 0 |1991 4541 12 11 17 58 0 2| 36M 19M| 28k 2964B| 44k 0 |2351 3774 19 28 14 37 0 1| 40M 19M| 72k 5062B| 0 0 |1707 3906 14 29 0 54 0 3| 58M 42M| 108k 7586B| 0 0 |2431 4646 8 23 0 67 0 2| 44M 35M| 77k 4188B| 0 0 |2948 4587 22 19 6 50 0 1| 30M 38M| 41k 2666B| 0 0 |2127 3924 6 33 29 31 0 1| 52M 38M|7628B 1511B| 0 0 |2055 3375 4 25 0 70 0 1|4624k 39M|4447B 1429B| 0 0 |1808 2749 10 32 3 52 1 2| 53M 42M| 27k 2296B| 0 0 |2144 4474 5 17 0 77 0 1| 88k 38M|5515B 420B| 0 0 |2261 3338 6 24 1 67 0 1| 66M 37M| 0 0 | 0 0 |2741 4099 2 27 17 53 0 1| 64M 32M| 0 0 | 32k 0 |2331 3356 2 35 17 43 0 2| 71M 39M| 0 0 | 0 0 |2460 3713 3 33 5 57 0 2| 69M 40M| 189B 202B| 0 0 |2212 3366 1 36 0 61 0 1| 72M 42M| 0 0 | 0 0 |2296 3481 1 35 0 62 0 2| 69M 40M| 0 65B| 0 0 |2235 3425 2 24 0 73 0 1| 37M 39M| 0 0 | 0 0 |2033 2912 ^C The above 2 results are from a 2.5" SATA disk attached to a USB 2.0 enclosure which has one USB connector connected to the laptop's USB port. This is a self-powered disk enclosure. Filesystems is use were, vfat for the former result and ext3 for the latter. Below are results from a different disk. ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 10 17 26 44 0 2| 32M 35M| 0 0 | 0 0 |3889 18k 12 20 34 35 0 0| 34M 36M| 0 0 | 0 0 |3923 19k 14 20 21 42 0 1| 36M 36M| 0 648B| 0 0 |4036 20k 14 22 21 41 0 0| 45M 37M| 0 324B| 0 0 |4140 24k 15 21 10 52 0 2| 35M 35M| 448B 520B| 0 0 |3947 19k 10 19 31 40 0 0| 30M 35M| 0 0 | 0 0 |3885 17k 18 22 14 46 0 0| 36M 37M| 92B 0 | 0 0 |4029 21k 16 21 18 43 0 1| 40M 36M| 92B 0 | 0 0 |3966 21k 11 23 28 37 0 0| 37M 36M| 92B 0 | 0 0 |3986 20k 11 17 31 41 0 0| 30M 35M| 0 0 | 0 0 |3893 19k 12 19 6 62 0 1| 29M 34M| 0 0 | 0 0 |3895 18k 12 19 0 67 0 2| 29M 35M| 0 0 | 0 0 |3974 17k 17 15 0 66 0 1| 15M 33M| 0 0 | 0 0 |3802 11k 32 17 5 46 0 0| 27M 36M| 108B 357B| 0 0 |3943 14k 17 14 2 65 0 1| 14M 33M| 0 0 | 0 0 |3884 11k 21 20 17 40 0 2| 28M 35M| 0 0 | 0 0 |3916 17k 17 24 8 50 0 0| 40M 37M| 55B 96B| 0 0 |3982 22k 19 27 13 41 0 0| 52M 37M| 0 0 | 0 0 |4265 29k 20 25 13 42 0 0| 40M 36M| 0 0 | 0 0 |3979 22k 21 28 8 41 1 2| 52M 36M| 420B 520B| 0 0 |4082 27k 20 32 16 31 0 0| 68M 38M| 0 0 | 0 0 |4343 33k^C This result is from a 2.5" SATA disk connected to a USB 2.0 enclosure with 2 USB connectors connected to the laptop. The filesystem is fuse (ntfs-3g). Looks good. Here's the interesting one. ----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system-- usr sys idl wai hiq siq| read writ| recv send| in out | int csw 11 3 82 2 0 1|1655k 267k| 0 0 |5486B 12k|1259 1863 16 23 25 35 0 0|1360k 0 |3022B 336B| 32k 0 | 972 3043 2 44 15 40 0 0| 64k 0 | 0 0 | 0 0 | 902 1141 4 3 93 0 0 0| 0 0 | 0 0 | 0 0 | 769 1235 5 2 92 0 0 0| 0 368k| 426B 520B| 0 0 | 557 1100 4 3 93 0 0 0| 0 0 | 92B 0 | 0 0 | 506 1041 4 3 94 0 0 0| 0 0 | 0 0 | 0 0 | 628 1005 4 2 93 0 0 0| 0 0 | 0 0 | 0 0 | 547 1036 6 2 92 0 0 0| 0 0 | 0 0 | 0 0 | 574 995 4 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 593 1126 6 3 91 0 0 0| 0 0 | 141B 84B| 0 0 | 684 1165 4 3 93 0 0 0| 0 0 | 0 0 | 0 0 | 514 1044 4 2 93 0 0 0| 0 0 | 0 0 | 0 0 | 485 850 4 3 92 0 0 0| 0 0 | 227B 484B| 0 0 | 645 1116 3 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 619 1009 4 3 92 1 0 0|8192B 1472k| 108B 292B| 0 0 | 608 1072 5 3 92 0 0 0| 0 0 | 187B 72B| 0 0 | 786 1208 4 2 94 0 0 0| 0 0 | 0 0 | 0 0 | 587 1098 3 3 94 0 0 0| 0 0 | 0 0 | 0 0 | 500 939 ^C This result is from a *3.5"* ATA disk connected to a USB 2.0 enclosure with 2 USB connectors connected to the laptop. The enclosure is externally powered. The disk is partition-less. The entire disk (/dev/sdb) is LUKS encrypted. The filesystem is ext3. As soon as I initiated the I/O, the performance went down (as mentioned in the above result). Also, the usb port was reset immediately which resulted in a read-only filesystem. Here are the relevant logs. [44125.008940] usb 5-8: new high speed USB device using ehci_hcd and address 10 [44125.375160] usb 4-2: new full speed USB device using uhci_hcd and address 2 [44125.488926] usb 4-2: device descriptor read/64, error -71 [44125.717839] usb 4-2: not running at top speed; connect to a high speed hub [44125.732838] usb 4-2: configuration #1 chosen from 1 choice [44125.735518] scsi5 : SCSI emulation for USB Mass Storage devices [44125.736912] usb 4-2: New USB device found, idVendor=05e3, idProduct=0702 [44125.736928] usb 4-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0 [44125.736933] usb 4-2: Product: USB TO IDE [44125.737807] usb-storage: device found at 2 [44125.737814] usb-storage: waiting for device to settle before scanning [44130.771126] usb-storage: device scan complete [44130.774592] scsi 5:0:0:0: Direct-Access ST325082 4A 0811 PQ: 0 ANSI: 0 [44130.780522] sd 5:0:0:0: [sdb] 488397168 512-byte hardware sectors (250059 MB) [44130.787520] sd 5:0:0:0: [sdb] Test WP failed, assume Write Enabled [44130.787520] sd 5:0:0:0: [sdb] Assuming drive cache: write through [44130.792520] sd 5:0:0:0: [sdb] 488397168 512-byte hardware sectors (250059 MB) [44130.799520] sd 5:0:0:0: [sdb] Test WP failed, assume Write Enabled [44130.799520] sd 5:0:0:0: [sdb] Assuming drive cache: write through [44130.799520] sdb: unknown partition table [44130.830056] sd 5:0:0:0: [sdb] Attached SCSI disk [44130.830056] sd 5:0:0:0: Attached scsi generic sg2 type 0 [44273.057272] kjournald starting. Commit interval 5 seconds [44273.064954] EXT3 FS on dm-2, internal journal [44273.065232] EXT3-fs: mounted filesystem with ordered data mode. [44306.991719] usb 4-2: reset full speed USB device using uhci_hcd and address 2 [44307.232054] usb 4-2: reset full speed USB device using uhci_hcd and address 2 [44307.468171] usb 4-2: reset full speed USB device using uhci_hcd and address 2 [44307.600787] usb 4-2: failed to restore interface 0 altsetting 0 (error=-71) [44307.601609] usb 4-2: USB disconnect, address 2 [44307.601609] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.601609] end_request: I/O error, dev sdb, sector 248121664 [44307.601609] Buffer I/O error on device dm-2, logical block 31015079 [44307.601609] lost page write due to I/O error on dm-2 [44307.601609] Buffer I/O error on device dm-2, logical block 31015080 [44307.601609] lost page write due to I/O error on dm-2 [44307.601609] Buffer I/O error on device dm-2, logical block 31015081 [44307.601609] lost page write due to I/O error on dm-2 [44307.601609] Buffer I/O error on device dm-2, logical block 31015082 [44307.601609] lost page write due to I/O error on dm-2 [44307.601635] Buffer I/O error on device dm-2, logical block 31015083 [44307.601639] lost page write due to I/O error on dm-2 [44307.601648] Buffer I/O error on device dm-2, logical block 31015084 [44307.602572] lost page write due to I/O error on dm-2 [44307.602572] Buffer I/O error on device dm-2, logical block 31015085 [44307.602572] lost page write due to I/O error on dm-2 [44307.602572] Buffer I/O error on device dm-2, logical block 31015086 [44307.602572] lost page write due to I/O error on dm-2 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.602572] end_request: I/O error, dev sdb, sector 248121728 [44307.602572] Buffer I/O error on device dm-2, logical block 31015087 [44307.602572] lost page write due to I/O error on dm-2 [44307.602572] Buffer I/O error on device dm-2, logical block 31015088 [44307.602572] lost page write due to I/O error on dm-2 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.602572] end_request: I/O error, dev sdb, sector 248121792 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.602572] end_request: I/O error, dev sdb, sector 248121856 [44307.602572] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.602572] end_request: I/O error, dev sdb, sector 248121920 [44307.602573] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK,SUGGEST_OK [44307.602573] end_request: I/O error, dev sdb, sector 248121984 [44307.603601] sd 5:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK [44307.603609] end_request: I/O error, dev sdb, sector 248122048 [44307.604568] sd 5:0:0:0: [sdb] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK,SUGGEST_OK [44307.604568] end_request: I/O error, dev sdb, sector 248122112 [44307.625509] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44307.763898] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44307.763898] ------------[ cut here ]------------ [44307.763898] WARNING: at fs/buffer.c:1186 mark_buffer_dirty+0x20/0x67() [44307.763898] Modules linked in: sha256_generic aes_i586 aes_generic cbc nls_utf8 nls_cp437 vfat fat nls_base usb_storage usbhid hid ff_memless tcp_diag inet_diag tun nvidia(P) rfcomm l2cap bluetooth xt_limit nf_conntrack_ipv6 ipv6 nf_conntrack_proto_dccp ts_kmp nf_conntrack_amanda nf_conntrack_irc nf_conntrack_sip nf_conntrack_netbios_ns nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_netlink nfnetlink nf_conntrack_ftp nf_conntrack_tftp nf_conntrack_sane xt_conntrack nf_conntrack_proto_sctp nf_conntrack_proto_udplite nf_conntrack_h323 acpi_cpufreq cpufreq_conservative cpufreq_stats cpufreq_userspace cpufreq_powersave ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables bridge kvm_intel kvm fuse configfs loop firewire_sbp2 dm_crypt snd_hda_intel snd_usb_audio snd_pcm_oss snd_mixer_oss snd_pcm snd_usb_lib snd_hwdep arc4 snd_seq_dummy ecb crypto_blkcipher snd_seq_oss snd_seq_midi snd_rawmidi uvcvideo iwl3945 snd_seq_midi_event compat_ioctl32 snd_seq joydev mac80211 videodev i2c_i801 snd_timer snd_seq_device iTCO_wdt led_class serio_raw snd v4l1_compat intel_agp wmi rng_core i2c_core ac cfg80211 psmouse pcspkr agpgart button battery video output soundcore snd_page_alloc evdev dcdbas ext3 jbd mbcache dm_mirror dm_log dm_snapshot dm_mod sg sr_mod cdrom sd_mod ata_generic ata_piix firewire_ohci firewire_core libata scsi_mod crc_itu_t dock b44 ide_pci_generic ide_core ohci1394 sdhci ieee1394 mmc_core ricoh_mmc ssb pcmcia pcmcia_core firmware_class mii ehci_hcd uhci_hcd usbcore thermal processor fan thermal_sys [44307.763898] Pid: 8632, comm: cp Tainted: P 2.6.26-custom #1 [44307.763921] [<c01219c0>] warn_on_slowpath+0x40/0x79 [44307.763921] [<c0119aee>] check_preempt_wakeup+0x97/0xd1 [44307.763921] [<c011a404>] try_to_wake_up+0xe8/0xf1 [44307.763922] [<c023397e>] vt_console_print+0x32/0x278 [44307.763922] [<c023397e>] vt_console_print+0x32/0x278 [44307.763922] [<c023394c>] vt_console_print+0x0/0x278 [44307.763937] [<c0121c56>] __call_console_drivers+0x4f/0x5b [44307.763950] [<c013484a>] up+0x9/0x2a [44307.763969] [<c0122066>] release_console_sem+0x172/0x18b [44307.764087] [<c0194ed5>] mark_buffer_dirty+0x20/0x67 [44307.764102] [<f8b9dccb>] ext3_commit_super+0x3a/0x4e [ext3] [44307.764147] [<f8b9f0e2>] ext3_handle_error+0x6e/0x8e [ext3] [44307.764178] [<f8b9f18d>] ext3_error+0x3a/0x40 [ext3] [44307.764237] [<f8b94707>] read_block_bitmap+0x90/0x115 [ext3] [44307.764307] [<f8b95272>] ext3_new_blocks+0x199/0x569 [ext3] [44307.764395] [<f8b98c45>] ext3_get_blocks_handle+0x332/0x785 [ext3] [44307.764395] [<c0194ac9>] __find_get_block+0x162/0x16c [44307.764395] [<c015bad2>] __rmqueue+0x16/0x1b5 [44307.764395] [<f8b99137>] ext3_get_block+0x9f/0xd3 [ext3] [44307.764469] [<c0195ef8>] __block_prepare_write+0x16e/0x373 [44307.764469] [<c0196245>] block_write_begin+0x6c/0xc3 [44307.764469] [<f8b99098>] ext3_get_block+0x0/0xd3 [ext3] [44307.764469] [<f8b98814>] ext3_write_begin+0xc1/0x168 [ext3] [44307.764487] [<f8b99098>] ext3_get_block+0x0/0xd3 [ext3] [44307.764896] [<c015912d>] generic_file_buffered_write+0xfa/0x56a [44307.764997] [<f8b11925>] journal_stop+0x145/0x14e [jbd] [44307.765065] [<c0159b98>] __generic_file_aio_write_nolock+0x3fa/0x445 [44307.765141] [<c018acfa>] mnt_want_write+0x1a/0x5e [44307.765157] [<c018b649>] mnt_drop_write+0x1a/0xb2 [44307.765172] [<c015a194>] generic_file_aio_read+0x474/0x4fa [44307.765203] [<c0159c43>] generic_file_aio_write+0x60/0xb7 [44307.765253] [<f8b95f6c>] ext3_file_write+0x19/0x85 [ext3] [44307.765289] [<c017815d>] do_sync_write+0xc0/0x107 [44307.765369] [<c013140a>] autoremove_wake_function+0x0/0x2d [44307.765394] [<c011e114>] hrtick_set+0x7b/0xe6 [44307.765455] [<c017809d>] do_sync_write+0x0/0x107 [44307.765469] [<c01789d9>] vfs_write+0x84/0x121 [44307.765495] [<c0178b0e>] sys_write+0x3c/0x63 [44307.765525] [<c010398a>] syscall_call+0x7/0xb [44307.765894] ======================= [44307.765894] ---[ end trace 2a0ce193654d04fb ]--- [44307.884076] usb 4-2: new full speed USB device using uhci_hcd and address 3 [44308.017388] usb 4-2: device descriptor read/all, error -71 [44308.026550] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.047000] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.056026] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.075044] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.090090] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.102860] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.117901] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.122647] usb 4-2: new full speed USB device using uhci_hcd and address 4 [44308.127745] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.136581] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.150331] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.159068] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.168617] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.185580] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.200611] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.204343] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.217310] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.228915] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.254557] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.270601] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.300419] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.301453] usb 4-2: string descriptor 0 read error: -71 [44308.301572] usb 4-2: configuration #1 chosen from 1 choice [44308.308850] usb 4-2: can't set config #1, error -71 [44308.308899] usb 4-2: New USB device found, idVendor=05e3, idProduct=0702 [44308.308899] usb 4-2: New USB device strings: Mfr=0, Product=1, SerialNumber=0 [44308.328418] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.336523] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.367727] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.384314] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.399502] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.423943] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.439201] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.450486] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.460527] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.464059] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.477362] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.498686] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.516538] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.520738] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.540687] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.557256] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.579235] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.590239] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.605335] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.628031] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44308.990689] EXT3-fs error (device dm-2): read_block_bitmap: Cannot read block bitmap - block_group = 966, block_bitmap = 31653888 [44309.667656] Aborting journal on device dm-2. [44309.668659] __journal_remove_journal_head: freeing b_committed_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.668659] __journal_remove_journal_head: freeing b_frozen_data [44309.679137] ext3_abort called. [44309.679137] EXT3-fs error (device dm-2): ext3_journal_start_sb: Detected aborted journal [44309.679137] Remounting filesystem read-only [44338.161517] __ratelimit: 26116 messages suppressed [44338.161517] Buffer I/O error on device dm-2, logical block 8 [44338.161517] lost page write due to I/O error on dm-2 [44338.161517] Buffer I/O error on device dm-2, logical block 1027 [44338.161517] lost page write due to I/O error on dm-2 [44338.161517] Buffer I/O error on device dm-2, logical block 1539 [44338.161517] lost page write due to I/O error on dm-2 [44338.161531] Buffer I/O error on device dm-2, logical block 30998528 [44338.161538] lost page write due to I/O error on dm-2 [44338.162759] Buffer I/O error on device dm-2, logical block 30998529 [44338.162767] lost page write due to I/O error on dm-2 [44338.162776] Buffer I/O error on device dm-2, logical block 30998530 [44338.162781] lost page write due to I/O error on dm-2 This makes me feel that it might be a hardware issue. Ritesh -- Ritesh Raj Sarraf RESEARCHUT - http://www.researchut.com "Necessity is the mother of invention."
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