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Old 11-03-2014, 12:16 PM   #1
Qujo33
LQ Newbie
 
Registered: Nov 2014
Posts: 5

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Not sure about kernel errors


I have some Kernel errors that I've seen over the last couple of weeks that I think point to needing to run fsck - those would be the first four lines of this log. The rest of the log just appeared today for the first time. I have two questions.
1. Is my assessment of the first 4 lines correct?
2. It appears the rest of the log (to the best of my ability so far) to be related to a memory leak in kde4 and it was killed automatically. Is that what you guys see, and if so how do I fix it?

Any help would be very much appreciated, & thank you in advance. I am fairly new to troubleshooting these things.

---------------------- Kernel Begin -------------------------
WARNING: Kernel Errors Present
EXT4-fs (sda6): error count: 52 ...: 1 Time(s)
EXT4-fs (sda6): initial error at 1411646848: e ...: 1 Time(s)
EXT4-fs (sda6): last error at 1413904236: e ...: 1 Time(s)

1 Time(s): 0000000000000000 0000000000000000 0000000000000003 0000000000000000
1 Time(s): 0000000000000000 ffffffff815a0392 ffff8800204ce280 ffffffff8159d345
1 Time(s): 0000000300000fb8 0000000000000008 ffff88011ecb6918 ffff88011ecb6918
1 Time(s): [<00007fe7d0321660>] 0x7fe7d032165f
1 Time(s): [<ffffffff81004a28>] dump_trace+0x88/0x310
1 Time(s): [<ffffffff81004d80>] show_stack_log_lvl+0xd0/0x1d0
1 Time(s): [<ffffffff810061bc>] show_stack+0x1c/0x50
1 Time(s): [<ffffffff8112336c>] oom_kill_process+0x1fc/0x350
1 Time(s): [<ffffffff81123a89>] out_of_memory+0x439/0x470
1 Time(s): [<ffffffff8112971a>] __alloc_pages_nodemask+0xa0a/0xa20
1 Time(s): [<ffffffff81163a9d>] alloc_pages_current+0x9d/0x170
1 Time(s): [<ffffffff81185cc7>] do_sync_write+0x67/0x90
1 Time(s): [<ffffffff81186455>] vfs_write+0x1b5/0x1e0
1 Time(s): [<ffffffff81186d63>] SyS_write+0x43/0xa0
1 Time(s): [<ffffffff814a6a1f>] sock_aio_write+0x12f/0x150
1 Time(s): [<ffffffff814aaf3b>] sk_page_frag_refill+0x5b/0x100
1 Time(s): [<ffffffff814fe2ce>] tcp_sendmsg+0x2ee/0xd80
1 Time(s): [<ffffffff8159d345>] dump_header+0x78/0x20c
1 Time(s): [<ffffffff815a0392>] dump_stack+0x50/0x89
1 Time(s): [<ffffffff815adfed>] system_call_fastpath+0x1a/0x1f
1 Time(s): active_file:133 inactive_file:343 isolated_file:40
1 Time(s): free:27029 slab_reclaimable:3788 slab_unreclaimable:10958
1 Time(s): free_cma:0
1 Time(s): mapped:2889 shmem:2969 pagetables:12360 bounce:0
1 Time(s): unevictable:0 dirty:5 writeback:1 unstable:0
1 Time(s): 1048575 pages RAM
1 Time(s): 11520 pages in swap cache
1 Time(s): 14896 total pagecache pages
1 Time(s): 271125 pages shared
1 Time(s): 38827 pages reserved
1 Time(s): 975955 pages non-shared
1 Time(s): CPU 0: hi: 0, btch: 1 usd: 0
2 Time(s): CPU 0: hi: 186, btch: 31 usd: 0
1 Time(s): CPU 1: hi: 0, btch: 1 usd: 0
2 Time(s): CPU 1: hi: 186, btch: 31 usd: 0
1 Time(s): CPU 2: hi: 0, btch: 1 usd: 0
1 Time(s): CPU 2: hi: 186, btch: 31 usd: 0
1 Time(s): CPU 2: hi: 186, btch: 31 usd: 7
1 Time(s): CPU 3: hi: 0, btch: 1 usd: 0
1 Time(s): CPU 3: hi: 186, btch: 31 usd: 0
1 Time(s): CPU 3: hi: 186, btch: 31 usd: 36
1 Time(s): CPU: 0 PID: 16032 Comm: sshd Not tainted 3.11.10-21-desktop #1
1 Time(s): Call Trace:
1 Time(s): Free swap = 0kB
1 Time(s): Hardware name: Dell Inc. PowerEdge T610/09CGW2, BIOS 6.1.0 10/18/2011
1 Time(s): Killed process 2135 (kded4) total-vm:6402660kB, anon-rss:3279592kB, file-rss:0kB
1 Time(s): Mem-Info:


1 Time(s): Node 0 DMA free:15808kB min:264kB low:328kB high:396kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15996kB managed:15904kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
1 Time(s): Node 0 DMA per-cpu:
1 Time(s): Node 0 DMA32 free:77228kB min:55212kB low:69012kB high:82816kB active_anon:2533956kB inactive_anon:629036kB active_file:404kB inactive_file:1240kB unevictable:0kB isolated(anon):0kB isolated(file):160kB present:3378660kB managed:3300452kB mlocked:0kB dirty:20kB writeback:4kB mapped:10524kB shmem:10824kB slab_reclaimable:6360kB slab_unreclaimable:14340kB kernel_stack:1072kB pagetables:26336kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:25 all_unreclaimable? no
1 Time(s): Node 0 DMA32 per-cpu:
1 Time(s): Node 0 DMA32: 16111*4kB (UEM) 1342*8kB (UEM) 2*16kB (M) 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 1*2048kB (R) 0*4096kB = 77260kB
1 Time(s): Node 0 DMA: 0*4kB 0*8kB 0*16kB 0*32kB 1*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (R) 3*4096kB (M) = 15808kB
1 Time(s): Node 0 Normal free:15080kB min:12100kB low:15124kB high:18148kB active_anon:297640kB inactive_anon:303164kB active_file:128kB inactive_file:132kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:786432kB managed:722636kB mlocked:0kB dirty:0kB writeback:0kB mapped:1032kB shmem:1052kB slab_reclaimable:8792kB slab_unreclaimable:29492kB kernel_stack:3128kB pagetables:23104kB unstable:0kB bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:10916 all_unreclaimable? yes
1 Time(s): Node 0 Normal per-cpu:
1 Time(s): Node 0 Normal: 3157*4kB (UEM) 67*8kB (UEM) 9*16kB (UM) 1*32kB (R) 1*64kB (R) 0*128kB 1*256kB (R) 1*512kB (R) 1*1024kB (R) 0*2048kB 0*4096kB = 15196kB
1 Time(s): Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
1 Time(s): Out of memory: Kill process 2135 (kded4) score 845 or sacrifice child
1 Time(s): Swap cache stats: add 639556, delete 628036, find 2857608/2867856
1 Time(s): Total swap = 2110460kB
1 Time(s): [ 338] 0 338 334176 55 611 45 0 systemd-journal
1 Time(s): [ 377] 0 377 11835 142 25 104 -1000 systemd-udevd
1 Time(s): [ 756] 0 756 18435 55 42 204 0 cupsd
1 Time(s): [ 757] 102 757 10654 272 26 61 -900 dbus-daemon
1 Time(s): [ 759] 0 759 1064 5 8 30 0 acpid
1 Time(s): [ 760] 106 760 7023 26 18 47 0 avahi-daemon
1 Time(s): [ 762] 497 762 200597 91 42 35 0 nscd
1 Time(s): [ 764] 0 764 4705 21 13 126 0 cron
1 Time(s): [ 776] 0 776 5349 16 16 78 0 vsftpd
es
1 Time(s): Node 0 Normal per-cpu:
1 Time(s): Node 0 Normal: 3157*4kB (UEM) 67*8kB (UEM) 9*16kB (UM) 1*32kB (R) 1*64kB (R) 0*128kB 1*256kB (R) 1*512kB (R) 1*1024kB (R) 0*2048kB 0*4096kB = 15196kB
1 Time(s): Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
1 Time(s): Out of memory: Kill process 2135 (kded4) score 845 or sacrifice child
1 Time(s): Swap cache stats: add 639556, delete 628036, find 2857608/2867856
1 Time(s): Total swap = 2110460kB
1 Time(s): [ 338] 0 338 334176 55 611 45 0 systemd-journal
1 Time(s): [ 377] 0 377 11835 142 25 104 -1000 systemd-udevd
1 Time(s): [ 756] 0 756 18435 55 42 204 0 cupsd
1 Time(s): [ 757] 102 757 10654 272 26 61 -900 dbus-daemon
1 Time(s): [ 759] 0 759 1064 5 8 30 0 acpid
1 Time(s): [ 760] 106 760 7023 26 18 47 0 avahi-daemon
1 Time(s): [ 762] 497 762 200597 91 42 35 0 nscd
1 Time(s): [ 764] 0 764 4705 21 13 126 0 cron
1 Time(s): [ 776] 0 776 5349 16 16 78 0 vsftpd
1 Time(s): [ 778] 0 778 2342 164 9 616 0 haveged
1 Time(s): [ 779] 0 779 2249 1 8 40 0 xinetd
1 Time(s): [ 783] 0 783 80016 0 62 281 0 ModemManager
1 Time(s): [ 793] 0 793 7183 43 20 66 0 systemd-logind
1 Time(s): [ 798] 0 798 44365 44 83 324 0 nmbd
1 Time(s): [ 849] 0 849 80835 381 27 101 0 rsyslogd
1 Time(s): [ 856] 499 856 128684 2614 47 1547 0 polkitd
1 Time(s): [ 894] 0 894 6152 16 17 40 0 kdm
1 Time(s): [ 1256] 0 1256 71796 13733 129 1157 0 Xorg
1 Time(s): [ 1613] 0 1613 1115 2 8 23 0 agetty
1 Time(s): [ 1869] 0 1869 20054 2 45 174 0 kdm
1 Time(s): [ 1899] 0 1899 59063 95 112 384 0 smbd
1 Time(s): [ 1900] 0 1900 59063 120 109 384 0 smbd
1 Time(s): [ 1903] 1006 1903 9524 92 23 60 0 systemd
1 Time(s): [ 1904] 1006 1904 37600 1 38 436 0 (sd-pam)
1 Time(s): [ 1905] 1006 1905 2695 0 11 31 0 ck-launch-sessi
1 Time(s): [ 1933] 1006 1933 3517 1 12 61 0 dbus-launch
1 Time(s): [ 1934] 1006 1934 8509 162 19 48 0 dbus-daemon
1 Time(s): [ 1936] 1006 1936 84841 333 34 94 0 ibus-daemon
1 Time(s): [ 1955] 1006 1955 45508 0 25 133 0 gvfsd
1 Time(s): [ 1960] 1006 1960 67849 0 33 691 0 gvfsd-fuse
1 Time(s): [ 1962] 1006 1962 66652 0 33 183 0 ibus-dconf
1 Time(s): [ 1963] 1006 1963 147904 562 108 912 0 ibus-ui-gtk3
1 Time(s): [ 1967] 1006 1967 78588 69 89 527 0 ibus-x11
1 Time(s): [ 1985] 1006 1985 83812 0 32 149 0 at-spi-bus-laun
1 Time(s): [ 1999] 0 1999 523491 32 58 270 0 console-kit-dae
1 Time(s): [ 2070] 1006 2070 30744 34 29 123 0 at-spi2-registr
1 Time(s): [ 2076] 1006 2076 3272 3 11 85 0 startkde
1 Time(s): [ 2077] 1006 2077 3140 11 9 69 0 ssh-agent
1 Time(s): [ 2101] 1006 2101 47723 95 30 70 0 ibus-engine-sim
1 Time(s): [ 2131] 1006 2131 1021 0 6 28 -300 start_kdeinit
1 Time(s): [ 2132] 1006 2132 90357 206 149 1192 -300 kdeinit4
1 Time(s): [ 2133] 1006 2133 90870 253 136 1229 0 klauncher
1 Time(s): [ 2135] 1006 2135 1600665 819898 2804 477732 0 kded4
1 Time(s): [ 2138] 1006 2138 112071 552 173 1624 0 kglobalaccel
1 Time(s): [ 2144] 1006 2144 112851 193 175 1706 0 kwalletd
1 Time(s): [ 2149] 1006 2149 190758 226 150 2186 0 kactivitymanage
1 Time(s): [ 2150] 0 2150 54888 129 41 160 0 upowerd
1 Time(s): [ 2195] 1006 2195 1055 0 7 22 0 kwrapper4
1 Time(s): [ 2196] 1006 2196 133266 741 183 1462 0 ksmserver
1 Time(s): [ 2203] 0 2203 88462 215 38 109 0 udisksd
1 Time(s): [ 2219] 1006 2219 716597 1890 232 2874 0 kwin
1 Time(s): [ 2224] 1006 2224 1000650 29564 416 3690 0 plasma-desktop
1 Time(s): [ 2278] 1006 2278 214432 1462 217 476 0 knotify4
1 Time(s): [ 2281] 1006 2281 2466 1 10 82 0 ksysguardd
1 Time(s): [ 2285] 1006 2285 71673 200 123 947 0 kuiserver
1 Time(s): [ 2298] 1006 2298 109368 175 135 1264 0 nepomukserver
1 Time(s): [ 2301] 1006 2301 94973 158 139 1879 0 nepomukstorage
1 Time(s): [ 2302] 1006 2302 204157 378 252 3006 0 krunner
1 Time(s): [ 2305] 1006 2305 192620 1497 196 1976 0 kmix
1 Time(s): [ 2308] 1006 2308 136295 1882 189 1587 0 ksysguard
1 Time(s): [ 2310] 1006 2310 74779 169 83 230 0 pulseaudio
1 Time(s): [ 2311] 105 2311 40664 9 16 42 0 rtkit-daemon
1 Time(s): [ 2317] 0 2317 4778 0 14 63 0 bluetoothd
1 Time(s): [ 2332] 1006 2332 2466 47 10 37 0 ksysguardd
1 Time(s): [ 2337] 1006 2337 63357 4649 35 1020 0 virtuoso-t
1 Time(s): [ 2370] 1006 2370 173552 563 254 5464 0 python
1 Time(s): [ 2389] 1006 2389 95256 159 140 1052 0 polkit-kde-auth
1 Time(s): [ 2391] 1006 2391 113485 375 177 1568 0 klipper
1 Time(s): [ 2392] 1006 2392 41278 428 84 2865 0 python
1 Time(s): [ 2393] 1006 2393 34827 76 71 3187 0 python
1 Time(s): [ 2409] 1006 2409 131684 334 144 1145 0 nepomukfilewatc
1 Time(s): [ 2419] 0 2419 66085 293 125 321 0 smbd
1 Time(s): [ 2445] 1006 2445 27870 2 39 326 0 kdesud
1 Time(s): [ 2457] 0 2457 66097 275 125 348 0 smbd
1 Time(s): [ 2496] 0 2496 3551 1 13 71 0 dbus-launch
1 Time(s): [ 2497] 0 2497 8390 2 19 73 0 dbus-daemon
1 Time(s): [ 2540] 1006 2540 715387 2207 219 4629 0 systemsettings
1 Time(s): [ 2552] 0 2552 9520 90 24 61 0 systemd
1 Time(s): [ 2553] 0 2553 37615 1 38 456 0 (sd-pam)
1 Time(s): [ 3934] 0 3934 66029 344 125 203 0 smbd
1 Time(s): [ 4311] 0 4311 66029 357 125 203 0 smbd
1 Time(s): [ 8702] 0 8702 7027 0 18 96 0 wpa_supplicant
1 Time(s): [ 9732] 0 9732 65979 319 125 204 0 smbd
1 Time(s): [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
1 Time(s): [12323] 1006 12323 31631 172 30 0 0 rccexternal
1 Time(s): [14818] 101 14818 12516 158 27 0 0 sshd
1 Time(s): [14820] 101 14820 12516 157 27 0 0 sshd
1 Time(s): [14924] 101 14924 12516 158 26 0 0 sshd
1 Time(s): [14926] 101 14926 12516 157 26 0 0 sshd
1 Time(s): [15013] 101 15013 12516 157 25 0 0 sshd
1 Time(s): [15663] 101 15663 12516 157 26 0 0 sshd
1 Time(s): [15666] 101 15666 12516 157 26 0 0 sshd
1 Time(s): [15671] 101 15671 12516 157 26 0 0 sshd
1 Time(s): [16029] 101 16029 12516 157 27 0 0 sshd
1 Time(s): [16061] 101 16061 12516 158 26 0 0 sshd
1 Time(s): [16602] 0 16602 15788 115 35 99 0 cron
1 Time(s): [16605] 1006 16605 2887 58 11 0 0 sh
1 Time(s): [16607] 1006 16607 2887 60 11 0 0 sh
1 Time(s): [16610] 1006 16610 2888 65 11 0 0 offsite_backup.
1 Time(s): [16623] 1006 16623 1678 50 7 0 0 ncpmount
1 Time(s): [16640] 1006 16640 4851 57 14 0 0 sendmail
1 Time(s): [16645] 1006 16645 4848 55 12 0 0 postdrop
1 Time(s): [16646] 1006 16646 5354 91 16 0 0 rsync
1 Time(s): [16649] 1006 16649 9079 156 22 0 0 ssh
1 Time(s): [17129] 101 17129 12516 158 26 0 0 sshd
1 Time(s): [17135] 101 17135 12516 158 27 0 0 sshd
1 Time(s): [17137] 101 17137 12516 158 25 0 0 sshd
1 Time(s): [17147] 101 17147 12516 157 26 0 0 sshd
1 Time(s): [17161] 101 17161 12516 157 26 0 0 sshd
1 Time(s): [17167] 101 17167 12516 158 26 0 0 sshd
1 Time(s): [17179] 101 17179 12516 157 27 0 0 sshd
1 Time(s): [17186] 101 17186 12516 157 25 0 0 sshd
1 Time(s): [17195] 101 17195 12516 155 26 0 0 sshd
1 Time(s): [17395] 1006 17395 66098 421 125 202 0 smbd
1 Time(s): [17396] 0 17396 66008 322 125 202 0 smbd
1 Time(s): [17397] 0 17397 66080 413 125 202 0 smbd
1 Time(s): [17425] 0 17425 66112 447 125 204 0 smbd
1 Time(s): [17426] 0 17426 66088 407 125 202 0 smbd
1 Time(s): [17524] 101 17524 12516 157 26 0 0 sshd
1 Time(s): [17526] 101 17526 12516 158 26 0 0 sshd
1 Time(s): [17528] 101 17528 12516 157 27 0 0 sshd
1 Time(s): [17777] 101 17777 12516 159 26 0 0 sshd
1 Time(s): [17779] 101 17779 12516 157 26 0 0 sshd
1 Time(s): [18427] 0 18427 15787 107 35 100 0 cron
1 Time(s): [18429] 1006 18429 2887 58 11 0 0 sh
1 Time(s): [18430] 1006 18430 2887 60 11 0 0 sh
1 Time(s): [18432] 1006 18432 2887 64 11 0 0 sh
1 Time(s): [18440] 1006 18440 1121 19 7 0 0 scp
1 Time(s): [18441] 1006 18441 9026 154 23 0 0 ssh
1 Time(s): [18768] 101 18768 12516 158 25 0 0 sshd
1 Time(s): [18770] 101 18770 12516 157 26 0 0 sshd
1 Time(s): [18909] 1006 18909 3304 0 10 100 0 xdg-su
1 Time(s): [18912] 1006 18912 113748 0 139 1601 0 kdesu
1 Time(s): [18927] 1006 18927 46356 7 42 327 0 kdesud
1 Time(s): [18930] 1006 18930 16603 2 37 137 0 su
1 Time(s): [18933] 0 18933 1110 3 8 24 0 kdesu_stub

1 Time(s): [18936] 0 18936 3306 3 10 97 0 yast2
1 Time(s): [18957] 0 18957 112402 754 135 945 0 y2controlcenter
1 Time(s): [19139] 0 19139 136596 30295 170 0 -900 packagekitd
1 Time(s): [23459] 0 23459 11654 25 25 122 -1000 sshd
1 Time(s): [23464] 1008 23464 9521 91 22 59 0 systemd
1 Time(s): [23465] 1008 23465 37615 1 38 466 0 (sd-pam)
1 Time(s): [26676] 1006 26676 668442 6038 213 0 0 kscreenlocker_g
1 Time(s): active_anon:707899 inactive_anon:233050 isolated_anon:0
1 Time(s): lowmem_reserve[]: 0 0 0 0
1 Time(s): lowmem_reserve[]: 0 0 705 705
1 Time(s): lowmem_reserve[]: 0 3219 3925 3925
1 Time(s): sshd cpuset=/ mems_allowed=0
1 Time(s): sshd invoked oom-killer: gfp_mask=0x42d0, order=3, oom_score_adj=0

---------------------- Kernel End -------------------------
 
Old 11-03-2014, 06:29 PM   #2
allend
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Registered: Oct 2003
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I see a system running low on memory.
I am very concerned by the presence of 27 instances of sshd running on your system. I fear that you have poor security on your secure shell configuration which is allowing hackers to exploit your system.
 
Old 11-04-2014, 08:39 AM   #3
Qujo33
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Thank you

Ok, memory I can deal with. I saw those ssh sessions. I have been a little concerned about security so over the last week I actually ended up trying to harden our systems. Removing any unnecessary logins and the couple that I still allow creating much harder passwords from a password generator with upper/lower case letters, not dictionary words and special characters. I figured this out when I started looking 1 - we did not have zones setup on our two network interfaces and more importantly 2 - the firewall was down for some amount of time. Both of those issues have been fixed. Couldn't the low memory be caused by the memory leak in kde4? We were having an issue with periodic high cpu utilization and it seemed to be caused by NVidia video problem. I lowered the resolution and we have not had that problem in over two weeks. So how, then would you approach this to clean it up best? And thank you for your help.

Last edited by Qujo33; 11-04-2014 at 09:14 AM. Reason: add information
 
Old 11-04-2014, 10:07 AM   #4
Qujo33
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multiple ssh sessions

This server does multiple backups using rsync and ssh. I am not sure of the timing as to when the problem happened that generated this dump file - but we could have had multiple rsync ssh sessions going at that time. I am looking into it - wouldn't this explain some of it? Again, I am looking but additional thoughts are welcome.
 
Old 11-04-2014, 12:00 PM   #5
Fantasio
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A question, why do you use KDE on a server, you should run it under runlevel 3 ?
 
Old 11-04-2014, 12:12 PM   #6
Qujo33
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This was our very first Linux server - coming from a Novell Netware world. The consultant who helped us felt it would be an easier adjustment (it was) and he noted that it would be less resource intensive to run it without the GUI. I think at this point I could go without it but others in my organization likely couldn't in my absence.
 
Old 11-05-2014, 01:16 PM   #7
Fantasio
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Using a GUI is fun, helpful but not actually efficient, the best is the command line, it's my day-to-day job, putty is my best collegue.
When you 've a crash, do you 've entries in /var/log/Xorg.log ? I guess, a shared memory matter with the video.
 
Old 11-05-2014, 03:30 PM   #8
Qujo33
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ok, the video may indeed be a problem:

Xorg.log lists this:
Buggy monitor, no preferred refresh rate given
Not using mode "1280x1024" (bad mode clock/interlace/doublescan)



I think I am getting closer to the main issue. Using dmesg I get the following few lines:

[ 24.170624] EXT4-fs (sda6): warning: mounting fs with errors, running e2fsck is recommended
[ 33.009871] EXT4-fs error (device sda6): ext4_mb_generate_buddy:755: group 1, 23068 clusters in bitmap, 23067 in gd
[ 50.181536] EXT4-fs error (device sda6): ext4_mb_generate_buddy:755: group 73, 32605 clusters in bitmap, 32604 in gd
[ 50.182082] JBD2: Spotted dirty metadata buffer (dev = sda6, blocknr = 0). There's a risk of filesystem corruption in case of system crash.
[ 56.858276] EXT4-fs error (device sda6): ext4_mb_generate_buddy:755: group 143, 32744 clusters in bitmap, 32721 in gd

[ 321.474172] EXT4-fs (sda6): error count: 64
[ 321.474189] EXT4-fs (sda6): initial error at 1411646848: ext4_lookup:1438: inode 1179805
[ 321.474196] EXT4-fs (sda6): last error at 1415213558: ext4_mb_generate_buddy:755

The last error works out to when I rebooted it at lunch to try to run fsck on the sda6 partition - which is my root partition.

In booting from the rescue option from the OpenSUse 13.1 (same version) USB. I try fsck /dev/sda6 and it says "Possibly non-existent device?". However I can run fsck on /dev/sda. Now this is a two drive Dell system that has hardware RAID and two 1TB disks in it. When attempting to do this I get the error:


fsck.ext4: Bad magic number in super-block while trying to open /dev/sda
/dev/sda:
The superblock could not be read or does not describe a correct ext2
filesystem. If the device is valid and it really contains an ext2
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>


I did not know the block size at that time so I ended up having to boot the machine and find it out (4096). And at that time it was time to let the users back on it. I know this is NOT a good idea but I do have bosses.... So I am guessing my next attempt would be to boot it back to rescue and try the following command:

e2fsck -b 32768 /dev/sda

Is that correct?

Since Linux only sees the two drives as one drive I am guessing that really doesn't do me any good and the problem is likely on both drives.

Thank you again for your help and suggestions.
 
  


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