Hi,
In my case, most of the time for ARM images I use as root(be careful!):
more /dev/sdb > /dev/sdc # I use sdb as source and sdc as destination sync
It makes an exact copy and you don't have to care about options.
Best regards, Alexis.
Le 06/08/2014 05:44, Robert Moskowitz a écrit :
This is a Fedora arm problem, but probably more experience with dd and sd cards here...
SO I boot my Cubieboard2 from microSD. I grabbed 8 16GB cards from the bin at the MicroCenter checkout counter. They work fine for building F21 arm boots, but I am getting far enough into the process that if I do something wrong, I don't want to go all the way back to the beginning. I rather clone the card, play around, and soforth. So I tried using:
sudo dd if=/dev/sdb of=/dev/sdc bs=4096 conv=notrunc,noerror; sync
the target sd card has been previously use. The copy fails in use as follows:
Mounting Configuration File System...
[ OK ] Mounted Configuration File System. [ OK ] Found device /dev/disk/by-uuid/1dc878de-92d2-4a66-b352-f055a32473b9. [ OK ] Started dracut initqueue hook. [ OK ] Started Show Plymouth Boot Screen. [ OK ] Reached target Paths. [ OK ] Reached target Basic System. Starting dracut pre-mount hook... [ OK ] Reached target Remote File Systems (Pre). [ OK ] Reached target Remote File Systems. Starting File System Check on /dev/disk/by-uuid/1dc8...f055a32473b9... [ 13.911063] systemd-fsck[368]: _/: The filesystem size (according to the superblock) is 3587707 blocks [ OK ] Started dracut pre-mount hook. [ 13.919598] systemd-fsck[368]: The physical size of the device is 3548795 blocks [ 13.937109] systemd-fsck[368]: Either the superblock or the partition table is likely to be corrupt! [ 13.944962] systemd-fsck[368]: _/: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. [ 13.950853] systemd-fsck[368]: (i.e., without -a or -p options) [ OK ] Started File System Check on /dev/disk/by-uuid/1dc87...2-f055a32473b9. Mounting /sysroot... [ 14.483857] random: nonblocking pool is initialized [ 14.571964] EXT4-fs (mmcblk0p3): bad geometry: block count 3587707 exceeds size of device (3548795 blocks) [FAILED] Failed to mount /sysroot. See 'systemctl status sysroot.mount' for details. [DEPEND] Dependency failed for Initrd Root File System. [DEPEND] Dependency failed for Reload Configuration from the Real Root. [ OK ] Stopped dracut pre-pivot and cleanup hook. [ OK ] Stopped target Initrd Default Target. [ OK ] Stopped dracut mount hook. [ OK ] Reached target Initrd File Systems. [ OK ] Stopped target Basic System. [ OK ] Stopped target System Initialization. Starting Emergency Shel Generating "/run/initramfs/rdsosreport.txt"
Entering emergency mode. Exit the shell to continue. Type "journalctl" to view system logs. You might want to save "/run/initramfs/rdsosreport.txt" to a USB stick or /boot after mounting them and attach it to a bug report.
:/#
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I put the card back in my build system and looked at it with Gparted which shows the whole drive as unallocated, even though the system successfully mounted /boot (but not /).
So the question is: HOw better can I clone the card? SDFormatter in Windows is one suggestion, but I don't want to have to jump over to the family XP system.
thanks