Le 15 déc. 2010 à 20:20, Warren Block a écrit : > On Wed, 15 Dec 2010, bsd wrote: > >> Is there a way to dd to a file to create an iso image and then restore >> (still using dd from this image). >> I only have one IDE <--> USB cable so this is the reason why It'd more >> simple for me to create an iso image of the disk and then restore. > > Use dd's of= parameter to send output to a file. If it really has to be an > ISO, pipe it to mkisofs. Using dd like that makes big files with lots of > wasted space. The article I posted earlier shows how to save some of that by > filling the disk's empty space with zeros. Then gzip can do some useful > compression. > >> Using dump won't be very useful because I won't be able to get the first 63 >> segments where boot info are written, I need something of lower level >> (obviously dd will be my friend). > > A hybrid approach would be to save the first 63 blocks with dd, then use dump > for the UFS filesystems. > > dd if=/dev/ad0 of=mbr.bin count=63 > > PS: top-posting bad, inline with trimmed irrelevancies good.
Ok, Thanks for the link and explanation. I have tried to use the compressed approach using smthg like: # mount /dev/ad0s1a /mnt # cd /mnt # dd if=/dev/zero of=zerofile bs=1M I have a lot of errors on standerr output such as : g_vfs_done() : da0s1a [WRITE(offset=58978680256, length=131072)]error = 5 Up to a point where It has finaly freezed my running FBSD 8.1. I don't think I have reached the end of the file… ?? -- I am restarting the operation. –––––––––––––––––––––––––––––––––––––––––––––– ---------> Grégory Bernard Director <--------- ---------------> www.osnet.eu <--------------- --> Your provider of OpenSource appliances <-- –––––––––––––––––––––––––––––––––––––––––––––– OSnetOSnetOSnetOSnetOSnetOSnetOSnetOSnetOSnetO _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"