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--- dev:ubuntu:clonedisk [2013/04/18 15:57]
jamis7005 создано
+++ dev:ubuntu:clonedisk [2013/04/19 19:01] (текущий)
jamis7005
@@ Строка 1: / Строка 1: @@
 ====== Clone HDD or flash disks ======
-===== Copying one partition =====
+===== Whole disk =====
+  dd if=/dev/sda of=hdd.img
-The image created may be too large for your hard drive:\\
+  dd if=hdd.img of=/dev/sda
-''dd if=/dev/sda of=hdd.img''
-Clone the image back onto another drive:\\
-''dd if=hdd.img of=/dev/sda''
+===== One partition =====
+  dd if=/dev/sda1 of=hdd.img
+  dd if=hdd.img of=/dev/sda1
+===== One partition =====
+  dd if=/dev/sda1 of=hdd.img
+  dd if=hdd.img of=/dev/sda1
+===== CD =====
+  dd if=/dev/cdrom of=/mnt/cdbackup.iso
+  dd if=/mnt/cdbackup.iso of=/dev/cdrom
+===== Over network =====
+Clone drives over a network:\\
+  dd if=/dev/sda | ssh username@host "dd of=/dev/sda"
+Dump an image over a network:\\
+  dd if=/dev/sda | ssh username@host "dd of=/mnt/hdd.img"
+Clone a networked drive onto yours:\\
+  ssh username@host "dd if=/dev/sda" | dd of=/dev/sda
+Clone a networked image onto yours:\\
+  ssh username@host "dd if=/mnt/hdd.img" | dd of=/dev/sda
 ===== Copying MBR =====
+[[http://www.cyberciti.biz/faq/howto-copy-mbr|src]]\\
 MBR Total Size = 446 + 64 + 2 = 512
   * 446 bytes - Bootstrap.
@@ Строка 23: / Строка 43: @@
 **dd command to copy MBR (identically sized partitions only)**
-Type dd command as follows:
+Type dd command as follows:\\
-''dd if=/dev/sda of=/dev/sdb bs=512 count=1''
+  dd if=/dev/sda of=/dev/sdb bs=512 count=1
 Above command will copy 512 bytes (MBR) from sda to sdb disk. This will only work if both discs have identically sized partitions.
@@ Строка 30: / Строка 50: @@
 **dd command for two discs with different size partitions**
-''dd if=/dev/sda of=/tmp/mbrsda.bak bs=512 count=1''
+  dd if=/dev/sda of=/tmp/mbrsda.bak bs=512 count=1
+Now to restore the image to any sdb:\\
+  dd if=/tmp/mbrsda.bak of=/dev/sdb bs=446 count=1
+** example: 32Gb to 8Gb**\\
+Given:
+  * sdc: 32Gb with sdc1=4Gb, sdc2=4Gb, and 23Gb of free space.
+  * sdd: 8Gb
+Count number of blocks to copy:
+  8015282176/512 = 15654848
+Create image file:
+  sudo dd if=/dev/sdc of=jr1.img count=15654848
+Write image file:
+  sudo dd if=jr1.img of=/dev/sdd
+===== Watching Progress =====
+First, find out the process id of the dd process by running the following in the new virtual terminal.
+  $ pgrep -l '^dd$'
+dd
+To send the USR1 signal to the dd prcoess:
+  $ kill -USR1  8789
+  $
+Note that as soon as the USR1 signal is detected, dd will print out the current statistics to its STDERR.
+  $ dd if=/dev/random of=/dev/null bs=1K count=100
++14 records in
++14 records out
+bytes (204 B) copied, 24.92 seconds, 0.0 kB/s
-Now to restore the image to any sdb:
-''dd if=/tmp/mbrsda.bak of=/dev/sdb bs=446 count=1''