When backuping MBR, is there a differece between dd with count = 2 and count = 1 with corresponding...
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For instance, I'm going to backup MBR from /dev/sda hdd.
I can do this in two ways:
dd if=/dev/sda of=~/mbr.bak bs=512 count=1
dd if=/dev/sda of=~/mbr.bak bs=256 count=2
Will I get different backups? Or it is just a matter of speed?
linux hard-drive dd
asked Jan 31 at 18:34
aryndinaryndin
1154
add a comment |
For instance, I'm going to backup MBR from /dev/sda hdd.
I can do this in two ways:
dd if=/dev/sda of=~/mbr.bak bs=512 count=1
dd if=/dev/sda of=~/mbr.bak bs=256 count=2
Will I get different backups? Or it is just a matter of speed?
linux hard-drive dd
asked Jan 31 at 18:34
aryndinaryndin
1154
add a comment |
For instance, I'm going to backup MBR from /dev/sda hdd.
I can do this in two ways:
dd if=/dev/sda of=~/mbr.bak bs=512 count=1
dd if=/dev/sda of=~/mbr.bak bs=256 count=2
Will I get different backups? Or it is just a matter of speed?
linux hard-drive dd
asked Jan 31 at 18:34
aryndinaryndin
1154
For instance, I'm going to backup MBR from /dev/sda hdd.
I can do this in two ways:
dd if=/dev/sda of=~/mbr.bak bs=512 count=1
dd if=/dev/sda of=~/mbr.bak bs=256 count=2
Will I get different backups? Or it is just a matter of speed?
linux hard-drive dd
linux hard-drive dd
asked Jan 31 at 18:34
aryndinaryndin
1154
asked Jan 31 at 18:34
aryndinaryndin
1154
asked Jan 31 at 18:34
aryndinaryndin
1154
asked Jan 31 at 18:34
aryndinaryndin
1154
asked Jan 31 at 18:34
aryndinaryndin
1154
1154
add a comment |
add a comment |
1 Answer
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How about trying it yourself and checking the results?
# dd if=/dev/sda of=~/mbr.bak bs=512 count=1
1+0 records in
1+0 records out
512 bytes copied, 0.00229764 s, 223 kB/s
# dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
2+0 records in
2+0 records out
512 bytes copied, 0.00235596 s, 217 kB/s
Let's compare the results of the two commands, shall we?
# cmp mbr.bak mbr.bak2
#
No differences, just as expected.
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
add a comment |
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1 Answer
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1 Answer
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active
oldest
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active
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active
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votes
How about trying it yourself and checking the results?
# dd if=/dev/sda of=~/mbr.bak bs=512 count=1
1+0 records in
1+0 records out
512 bytes copied, 0.00229764 s, 223 kB/s
# dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
2+0 records in
2+0 records out
512 bytes copied, 0.00235596 s, 217 kB/s
Let's compare the results of the two commands, shall we?
# cmp mbr.bak mbr.bak2
#
No differences, just as expected.
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
add a comment |
How about trying it yourself and checking the results?
# dd if=/dev/sda of=~/mbr.bak bs=512 count=1
1+0 records in
1+0 records out
512 bytes copied, 0.00229764 s, 223 kB/s
# dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
2+0 records in
2+0 records out
512 bytes copied, 0.00235596 s, 217 kB/s
Let's compare the results of the two commands, shall we?
# cmp mbr.bak mbr.bak2
#
No differences, just as expected.
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
add a comment |
How about trying it yourself and checking the results?
# dd if=/dev/sda of=~/mbr.bak bs=512 count=1
1+0 records in
1+0 records out
512 bytes copied, 0.00229764 s, 223 kB/s
# dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
2+0 records in
2+0 records out
512 bytes copied, 0.00235596 s, 217 kB/s
Let's compare the results of the two commands, shall we?
# cmp mbr.bak mbr.bak2
#
No differences, just as expected.
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
How about trying it yourself and checking the results?
# dd if=/dev/sda of=~/mbr.bak bs=512 count=1
1+0 records in
1+0 records out
512 bytes copied, 0.00229764 s, 223 kB/s
# dd if=/dev/sda of=~/mbr.bak2 bs=256 count=2
2+0 records in
2+0 records out
512 bytes copied, 0.00235596 s, 217 kB/s
Let's compare the results of the two commands, shall we?
# cmp mbr.bak mbr.bak2
#
No differences, just as expected.
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
answered Jan 31 at 19:57
telcoMtelcoM
1,4291512
1,4291512
add a comment |
add a comment |
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