On 30 June 2011 04:10, AJ ONeal <coola...@gmail.com> wrote: > The cards are from the same manufacturer, and exactly the same size. > I've tried dd and not only does it take closer to 2.5 hours instead of 10 > minutes, it yields the same results. > dd if=/dev/sde of=/dev/sdf bs=8M
<Though I don't think it will solve the problem if Tom's suggestion didn't already help. But still a few points to note> This bs=8M doesn't seem the best/useful option. Also we need to remember 'dd' runs beneath the file-system layer and will copy bytes from image to the disk. Most of which(as per 2.5hours/10min) seems non-relevant data in this case. Assuming you create only primary partitions and you have the working 'master-copy' in /dev/sde, maybe you could try $ dd if=/dev/sde of=master_mbr.img bs=512 count=1 Then 'burn' only the good master mbr on all cards. $ dd if=master_mbr.img of=/dev/sdf //and other cards Once you unplug->plug the cards, it should be possible to have a script that formats the newly detected partitions(albeit malformed[*]) and do rysnc to copy the load. Btw, there just might be a way to emulate 'soft' unplug->plug of storage over USB using sysfs or somthing, that I am not aware of, which could make the whole process scripted. > The duplication process is a usb hub with many card readers attached and a > script that > creates a fake raid 1 (/dev/md0 sans raid info) out of the > cards and copies the used > bytes. If I had money to burn I would bet this scripted raid + usb hub thing has unveiled some bug that fails the almighty dd method. [*] It might be prudent to also script the capture first sector of each partition of the 'master' card. And burn them respectively after the unplug-plug of 'copy' cards. Rgds, -j -- Linaro.org │ Open source software for ARM SoCs | Follow Linaro http://facebook.com/pages/Linaro/155974581091106 - http://twitter.com/#!/linaroorg - http://linaro.org/linaro-blog _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
