7v5w7go9ub0o <7v5w7go9u...@gmail.com> [10-06-05 20:22]: > On 06/05/10 02:39, meino.cra...@gmx.de wrote: > [] > > > > Is there any faster and reliable way to checksum whole paritions (not > > on "per file" base)??? > > > FWIW, portage has a tool called "dcfldd" that works well for me. It is > dd with the addition of: > > * Hashing on-the-fly - dcfldd can hash the input data as it is > being transferred, helping to ensure data integrity. > * Status output - dcfldd can update the user of its progress in > terms of the amount of data transferred and how much longer operation > will take. > * Flexible disk wipes - dcfldd can be used to wipe disks quickly and > with a known pattern if desired. > * Image/wipe Verify - dcfldd can verify that a target drive is a > bit-for-bit match of the specified input file or pattern. > * Multiple outputs - dcfldd can output to multiple files or disks at > the same time. > * Split output - dcfldd can split output to multiple files with more > configurability than the split command. > * Piped output and logs - dcfldd can send all its log data and > output to commands as well as files natively. > > > e.g. when I copy my HD, I get a copy status report and hash by using the > following commands: > > #!/bin/bash > dcfldd if=/dev/sda bs=4096k sizeprobe=if status=on hashwindow=0 of=/dev/sdb > dcfldd if=/dev/sdb bs=4096k sizeprobe=if status=on hashwindow=0 of=/dev/null > > When they've completed, I'll visually compare the two hashes (you can > automate this.) You can get fancier and do the Verify instead of the hashes. > > HTH > > (p.s. Part of your answer is setting the best blocksize for dd or > dcfldd. > > I'd presume it the smaller of your available memory, or the buffer size > on your HD?...... someone please correct me on this!?) > >
That looks really interesting. The only problem I have with this is that I have to have /dev/sda as /dev/sdb idle (not mounted) and because of that I use knoppix as temporary system to boot. And I dont think that knoppix has this tool "on board". Or is there a way to do such copies from a one disk to another while one disk is booted??? Best regards, mcc -- Please don't send me any Word- or Powerpoint-Attachments unless it's absolutely neccessary. - Send simply Text. See http://www.gnu.org/philosophy/no-word-attachments.html In a world without fences and walls nobody needs gates and windows.
