Hello, It's my first post here, i hope it might be usefull. My full story can be found here: http://ubuntuforums.org/showthread.php?p=9607705#post9607705 I will try to summarize it here:
I have broken (fall) hdd, now im sure that's contain ~2GB od broken sectors, in 1/3 of disc capacity. I have been trying to make a dd copy : dd if=/dev/sdb conv=noerror,sync bs=4096k|pv| dd of=usb320.dd conv=noerror,sync bs=4096k > dd320.LOG but image took all my free diskspace (406GB), and terminated, eventhough my hdd is 320GB, (btw, a option to log dd output(errors) would be usefull, since i use screen terminal) r...@gamma:/home/jacek# fdisk -l /dev/sdb Disk /dev/sdb: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x5517132d Device Boot Start End Blocks Id System /dev/sdb1 1 262 2098176 27 Unknown /dev/sdb2 * 263 5485 41948749 7 HPFS/NTFS /dev/sdb3 5486 38913 268510410 f W95 Ext'd (LBA) /dev/sdb5 12037 38913 215889502+ 83 Linux /dev/sdb6 8696 12036 26836551 b W95 FAT32 /dev/sdb7 5486 6377 7164927 83 Linux /dev/sdb8 6378 6499 979933+ 82 Linux swap / Solaris Partition table entries are not in disk order finally i managed to make image with this command: dd if=/dev/sdb conv=noerror,sync |pv| dd of=usb320.dd conv=noerror,sync > dd320.LOG i guess that problem is bs size + sync + badblocks My disc contain about 2GB bad blocks (around 112Gbyte sector) thoese 4194304 sectors, exchenged (due to sync flag) for empty sectors in image file, would be: with bs=4096k: 4194304 * 4096k = 17592GB (that would definitely not fit on my disk) with bs=512: 4194304 * 512 = 2147MB (thats ok) so i guess, that dd is not considering what is block size while exchanging broken block in the image file. I'm not sure if it can be called a bug, but in my opinion is should be at least mentioned in manual (to care about block size while making dump of broken disc) btw - ddrescue also filed to complete backup. if you want more feedback - i still have the same hardware configuration, so i can provide more test Sirkubax r...@gamma:/mnt/csda8# dd --version dd (coreutils) 7.4 Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by Paul Rubin, David MacKenzie, and Stuart Kemp. r...@gamma:/mnt/csda8#
