William Kenworthy <bi...@iinet.net.au> [13-09-03 05:08]: > On 03/09/13 10:45, meino.cra...@gmx.de wrote: > > walt <w41...@gmail.com> [13-09-03 04:15]: > >> On 09/02/2013 09:15 AM, meino.cra...@gmx.de wrote: > >>> The rootfs and $HOME of my embedded system is stored > >>> on a 16GB SD-card (about 5GB used, rest free). The FS > >>> is ext4. > >>> > >>> Since the system hangs for unknown reasons several times > >> Does it hang at a predictable point, like during boot, or poweroff? > >> > >> I know almost nothing about SD cards (yet). Do they develop bad > >> blocks like other storage media? I notice fsck.ext4 has a -c flag > >> to check for bad blocks. > >> > > No, it hangs while compiling or while updateing (eix-sync; emerge ...). > > > > > > I did the following now: > > I did a binary image backup with dd of the sdcard. > > I made a backup of the all files from the bad fs with tar. > > I say "YES" to fsck to fix what it found. > > I made another backup of the all files from the bad fs with tar. > > I md5summed both tar archives and found them identical. > > > > Now...is the conclusion correct, that the identical md5sum > > indicate, that the fixed error of the fs only had impact to > > already invalidated data? > > Or whatelse could this indicate? > > > > Best regards, > > mcc > > > > PS: What come mind just in this moment: > > Can I ran fsck on an binary image of the fs which I made with dd somehow? > > > > > > > > > > > > Have you run out of inodes? - ext 4 has had very mixed success for me on > solid state. Running out of inodes is a real problem for gentoo on > smaller SD cards with standard settings. > > BillK > > >
Does this error message from fsck indicate that? I am really bad in guessing what fsck tries to cry at me ... ;) > > solfire:/root>fsck.ext4 -f -p /dev/sdb2 > > rootfs: Inodes that were part of a corrupted orphan linked list found. > > > > rootfs: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. > > (i.e., without -a or -p options) > > [1] 18644 exit 4 fsck.ext4 -f -p /dev/sdb2 > > > > Is there any way to correct the settings from the default values to more advances ones, which respect the sdcard size of 16GB *without* blanking it...a "correction on the fly" so to say??? And if not: Is there a way to backup the sdcard and playback the files after reformatting it by preserving all three time stamps of the files (atime is deactivated via fstab though) ? Best regards, mcc
