07-26-2012
The default block size of dd is 512 bytes. Try using bs=1M for example. The optimum value differs per system
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1. SCO
Hello everybody,
:confused:
I have to change the system disk on an old PC running SCO 5.0.5.
The disk is up and running, this is a preventive action.
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hello,
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5. Solaris
Hello guys!
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6. Filesystems, Disks and Memory
Hi,
I'm running Ubuntu on my laptop. To keep my data safe and easy disaster recovery as well I bought similar HDD to one installed in my laptop with higher capacity and using USB box I'm doing disk clone to it. So at any time I can replace disk and carry on with my work as before.
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Hi,
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8. HP-UX
Hello Friends,
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9. Linux
Dear All
I needed to clone my disk to another hard drive . I did it as the following :
#dd if=/dev/sdb of=/dev/sdc
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LEARN ABOUT FREEBSD
getbsize
GETBSIZE(3) BSD Library Functions Manual GETBSIZE(3)
NAME
getbsize -- get preferred block size
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
char *
getbsize(int *headerlenp, long *blocksizep);
DESCRIPTION
The getbsize() function returns a preferred block size for reporting by system utilities df(1), du(1), ls(1) and systat(1), based on the
value of the BLOCKSIZE environment variable. BLOCKSIZE may be specified directly in bytes, or in multiples of a kilobyte by specifying a
number followed by ``K'' or ``k'', in multiples of a megabyte by specifying a number followed by ``M'' or ``m'' or in multiples of a gigabyte
by specifying a number followed by ``G'' or ``g''. Multiples must be integers.
Valid values of BLOCKSIZE are 512 bytes to 1 gigabyte. Sizes less than 512 bytes are rounded up to 512 bytes, and sizes greater than 1 GB
are rounded down to 1 GB. In each case getbsize() produces a warning message.
The getbsize() function returns a pointer to a null-terminated string describing the block size, something like ``1K-blocks''. The memory
referenced by headerlenp is filled in with the length of the string (not including the terminating null). The memory referenced by
blocksizep is filled in with block size, in bytes.
SEE ALSO
df(1), du(1), ls(1), systat(1), environ(7)
HISTORY
The getbsize() function first appeared in 4.4BSD.
BSD
November 16, 2012 BSD