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Hardware and U-Boot firmware / Hardware / Re: Guruplug I/O and JDB errors on writing to micro SD card
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on: November 23, 2010, 03:02:10 AM
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I have a GPlug-Display which is configured with boot and root partitions on a micro-SD card (/dev/sda1, /dev/sda2, respectively) while there is an internal flash drive partitioned as FAT16 for storing videos (this is how it came configured).
When running applications that seem to write intensively to the flash (such as apt-upgrade but occassionally even simpler things), I randomly get errors on the console of form:
xa-sdh pxa-sdh.0: DATA Line Error(status: 0x0010)!
mmcblk0: error -5 transferring data, sector 1319016, nr 120, card status 0x900
end_request: I/O error, dev mmcblk0, sector 1319096
Buffer I/O error on device mmcblk0p2, logical block 139387
lost page write due to I/O error on mmcblk0p2
end_request: I/O error, dev mmcblk0, sector 1319104
Buffer I/O error on device mmcblk0p2, logical block 139388
lost page write due to I/O error on mmcblk0p2
end_request: I/O error, dev mmcblk0, sector 1319112
Buffer I/O error on device mmcblk0p2, logical block 139389
lost page write due to I/O error on mmcblk0p2
end_request: I/O error, dev mmcblk0, sector 1319120
Buffer I/O error on device mmcblk0p2, logical block 139390
lost page write due to I/O error on mmcblk0p2
end_request: I/O error, dev mmcblk0, sector 1319128
Buffer I/O error on device mmcblk0p2, logical block 139391
lost page write due to I/O error on mmcblk0p2
JBD: Detected IO errors while flushing file data on mmcblk0p2
JBD: Detected IO errors while flushing file data on mmcblk0p2
I'm not sure if this is due to bad flash or due to a driver issue. I am concerned though of course about data corruption.
NOTE the output of fdisk -l is:
Disk /dev/mmcblk0: 4035 MB, 4035969024 bytes
68 heads, 3 sectors/track, 38640 cylinders
Units = cylinders of 204 * 512 = 104448 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 1 1000 101998+ 6 FAT16
/dev/mmcblk0p2 1001 38640 3839280 83 Linux
Disk /dev/mmcblk1: 8018 MB, 8018460672 bytes
219 heads, 12 sectors/track, 5959 cylinders
Units = cylinders of 2628 * 512 = 1345536 bytes
Disk identifier: 0x00000000
Device Boot Start End Blocks Id System
/dev/mmcblk1p1 4 5960 7826432 b W95 FAT32
and the outut of df is:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mmcblk0p2 3778976 1072780 2514232 30% /
tmpfs 257748 0 257748 0% /lib/init/rw
udev 10240 520 9720 6% /dev
tmpfs 257748 4 257744 1% /dev/shm
In any case, the problem seems to occur when writing to the root filesystem
i have two gp+'s running and have since 8 months also the rootfs and swap allocated on mmc-cards. on one guruplug i've exactly the same problem as you (8gb mmc a-data), the other gp+ is running without any problem (4gb mmc)! i have not yet figured out what the problem is: the specific mmc-card or gp+ the problem occurs about one time in 2 months. i did a badsector check on my laptop, result: no bad sectors. my workaround is simple: insert the mmc-card in your laptop, do a fsck with autorepair (a lot of errors will be found) , after that my gp+ with that recovered mmc-rootFS is running fine for weeks. weekly i make a tar-backup of the rootFS, in the beginning i did not the above mentioned workaround, but formatted the root-partition and restored the tar-backup. |
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33
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Linux Stuff / General Linux questions / Re: [guruplug+] SSH hangs and other hanging problemsRX packets
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on: November 20, 2010, 10:10:50 AM
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get more details about your bad ssh-connection.
a) on your plug - start an extra ssh-server in debug mode;
root@plug:/etc/init.d# /usr/sbin/sshd -ddd -p 1234
b) on your pc - connect the extra ssh-server in debug-mode ;
ssh -l <loginname> <ip / ssh-server> -p 1234 -v
have a good look at:
dmesg
/var/log/syslog
/var/log/kern.log
ifconfig eth0/eth1 - RX packets (errors - dropped - collisions ?) - same for TX packets
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35
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General Category / Application ideas and development Q/A / Re: How to make my GuruPlug secure
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on: November 06, 2010, 02:22:21 PM
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GuruPlug Server Plus needs some major refactoring before it can be used.A recent publication suggested that the first step to wireless protection was to turn off the router broadcast. I tried it and it appears to work. But the next time I rebooted, Windows Vista Home Premium would not connect to the router.
that's a novice/stupid suggestion in that publication, 'cause : http://synjunkie.blogspot.com/2007/12/bypass-hidden-ssid-mac-address-filter.html.. Conclusion Hopefully this demonstration has proven to you how simple it is for an attacker to bypass some of the more basic restrictions. Don't rely on a hidden SSID or MAC Address filtering as your only security measures. They may stop the average neighbor from using your internet connection but they will not prevent an attacker from breaking into your network and using your internet connection. Posted by SynJunkie Labels: Kismet, WiFi .. |
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36
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Linux Stuff / General Linux questions / Re: GUI and VNC guruplug plus? anynone succeed?
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on: October 16, 2010, 02:29:10 PM
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i installed these packages below, so i'm able to run xorg,xeyes,synaptic,iceweasel,openoffice natively, 'can remotely connect my guruplug from home (ubuntu,gnome-rdp) and from work too (ssh->tunnel->mstsc) ii tightvncserver 1.3.9-6.1+b1 virtual network computing server software ii xserver-xorg 1:7.5+7 the X.Org X server ii rdesktop 1.6.0-3 RDP client for Windows NT/2000 Terminal Server ii xrdp 0.5.0~20100303cvs-6 Remote Desktop Protocol (RDP) server ii iceweasel 3.5.12-2 Web browser based on Firefox ii icewm 1.3.7~pre2-1 wonderful Win95-OS/2-Motif-like window manager ii icewm-common 1.3.7~pre2-1 wonderful Win95-OS/2-Motif-like window manager ii icewm-gnome-support 1.3.7~pre2-1 GNOME support files for IceWM ii icewm-themes 1.2.26-1 Theme files for the Ice Window Manager ii openoffice.org 1:3.2.1-6 office productivity suite pstree .. └─xrdp-sesman───xrdp-sessvc─┬─Xvnc ├─ck-launch-sessi─┬─ssh-agent │ └─x-session-manag─┬─icewm─┬─firefox-bin───10*[{firefox-bin}] │ │ └─xterm───bash │ ├─icewmbg │ └─icewmtray └─xrdp-chansrv───{xrdp-chansrv}  [/img][/img] |
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38
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General Category / Application ideas and development Q/A / Re: Guruplug add the graphical interface
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on: September 19, 2010, 01:54:55 PM
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@thrbigob, Did you happen to see the "No Display" error message when you installed Xorg? Also, do you have firefox working with Xorg?
Thanks,
Iansito
you just simply install iceweasel, then you get xorg* and icewm* installed too: ii iceweasel 3.5.12-2 Web browser based on Firefox ii icewm 1.3.7~pre2-1 wonderful Win95-OS/2-Motif-like window manager ii icewm-common 1.3.7~pre2-1 wonderful Win95-OS/2-Motif-like window manager ii icewm-gnome-support 1.3.7~pre2-1 GNOME support files for IceWM ii icewm-themes 1.2.26-1 Theme files for the Ice Window Manager i xserver-xorg 1:7.5+7 the X.Org X server ii xserver-xorg-core 2:1.7.7-6 Xorg X server - core server ii xserver-xorg-input-all 1:7.5+7 the X.Org X server -- input driver metapackage ii xserver-xorg-input-evdev 1:2.3.2-6 X.Org X server -- evdev input driver ii xserver-xorg-input-synaptics 1.2.2-2 Synaptics TouchPad driver for X.Org server ii xserver-xorg-video-all 1:7.5+7 the X.Org X server -- output driver metapackage ii xserver-xorg-video-apm 1:1.2.2-2 X.Org X server -- APM display driver ii xserver-xorg-video-ati 1:6.13.1-2 X.Org X server -- AMD/ATI display driver wrapper |
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39
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General Category / General Discussion / Re: Virtual Machine for GuruPlug development
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on: July 18, 2010, 02:15:07 PM
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i'm using ubuntu-lucid with "Oracle VM VirtualBox 3.2.6-63112",
no need to import the .vmdk,
in VirtualBox just open your {de91a558-197d-42d2-b9da-3e6334b9c3aa}.vmdk
only had to change your boot/grub entry ( on-the-fly changing "root=hda1 into root=sda1" ), it's running nicely now.
so: thanks-a-lot for this big_ignoramus, you made me happy !
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40
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Linux Stuff / General Linux questions / Re: Mounting eSATA Drive on boot
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on: June 21, 2010, 02:34:31 PM
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i had the exactly the same problem on my guruplug with ext3-fs, so i changed my fstab into:
/dev/sdb1 / ext3 defaults,noatime,errors=remount-ro 0 1 # mmc-sd
UUID=<UUID> /mnt/sdc2 ext3 rw,noexec,nodev,async,noatime,nodiratime,data=writeback 0 1 # 2tb sata disk - 1tb partition
That sounds quite logical to me ... just one question: How did you know, that /dev/sdb1 is the SD-Card? In the original configuration, my /etc/fstab is empty, so the SD is mounted in another way (which I don't know) ... Any suggestions? Sascha i had to flash a new u-boot: U-Boot 2010.03-01161-gd91b0a9 (Apr 22 2010 - 03:24:41) urls: http://oinkzwurgl.org/guruplug_uboothttp://plugcomputer.org/plugforum/index.php?topic=1642so had to change u-boot envs in order to boot from mmc-sd: u-boot, printenv: x_bootargs_root=root=/dev/sdb1 rootdelay=13 bootcmd=${x_bootcmd_usb}; ${x_bootcmd_kernel}; setenv bootargs ${x_bootargs} ${x_bootargs_root}; bootm 0x6400000; so: /dev/sdb1 is the rootFS |
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41
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Linux Stuff / General Linux questions / Re: Mounting eSATA Drive on boot
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on: June 21, 2010, 05:51:48 AM
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i had the exactly the same problem on my guruplug with ext3-fs, so i changed my fstab into:
/dev/sdb1 / ext3 defaults,noatime,errors=remount-ro 0 1 # mmc-sd
UUID=<UUID> /mnt/sdc2 ext3 rw,noexec,nodev,async,noatime,nodiratime,data=writeback 0 1 # 2tb sata disk - 1tb partition
now i don't have the mentioned problem anymore
when you change the fstab-line at-the-end into ... 0 0 , just to ignore the fsck, it must work anyway
in your case:
/dev/sda1 /srv ext4 defaults,noatime 0 0
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