[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Tue, 16 Apr 2002 14:25:18 +0100 (MET)
We normally use dd on Compaq Tru64 unix to make
copies of disks including partition information and data
from all partitions. It even works for the system disk.
We have tried to do the same thing in RedHat Linux 7.2 but with
problems. 1) It takes relatively long time, ca 15 h for 18 GB.
2) The operation ends with an error message ( No such device
or address). 3) If we try to copy the system disk in this way it will
not be a working bootable system disk.
Is this due to the fact that we are optimistically
trying to copy a mounted 'living' (system)disk or is this some kind
of problem with 'dd' ?
Sincerely Ib Koersner
The Svedberg Laboratory
Copying whole disks using dd with raw devices:
First connect raw devices to block devices:
raw /dev/raw/raw1 /dev/sda
raw /dev/raw/raw2 /dev/sdb
- Running time dd if=/dev/raw/raw1 of=/dev/raw/raw2 bs=2048
address@hidden root]# dd: reading `/dev/raw/raw1': No such device or address
8891619+1 records in
8891619+1 records out
|[Prev in Thread]
||[Next in Thread]|