* 2.4.10 and dd
@ 2001-09-27 20:02 Klaus Dittrich
2001-09-26 16:46 ` Jesper Juhl
0 siblings, 1 reply; 2+ messages in thread
From: Klaus Dittrich @ 2001-09-27 20:02 UTC (permalink / raw)
To: linux-kernel; +Cc: klaus
I do my backup using dd if=/dev/sda of=/dev/sdb bs=1024k.
With 2.4.10 this does not work anymore.
An fsck of the filesystem (ext2) of /dev/sdb3 (~8GB) is impossible
because of too much errors.
System: SMP, 2 x PIII-800, BX-Chipset, 1 GB RAM, glibc-2.2.4
--
Best regards
Klaus Dittrich
e-mail: kladit@t-online.de
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 2.4.10 and dd
2001-09-27 20:02 2.4.10 and dd Klaus Dittrich
@ 2001-09-26 16:46 ` Jesper Juhl
0 siblings, 0 replies; 2+ messages in thread
From: Jesper Juhl @ 2001-09-26 16:46 UTC (permalink / raw)
To: Klaus Dittrich; +Cc: linux-kernel, klaus
Klaus Dittrich wrote:
> I do my backup using dd if=/dev/sda of=/dev/sdb bs=1024k.
ehh, isn't that kind of dangerous???
What if files move around on disk while dd is running? imagine that dd is in the process of copying blocks belonging to a big file "foo",
and now in the middle of this something causes "foo" (or just parts of "foo") to move to a different location - you now have a seriously screwed
copy of "foo" on the new disk...
I'd expect that all sorts of strange corruption of the copy could happen that way. I could be wrong, and maybe someone who knows more about
how the filesystems work can tell if I am, but I know for sure that I would never dare to do backups that way.
Best regards,
Jesper Juhl
juhl@eisenstein.dk
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2001-09-26 16:46 ` Jesper Juhl
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