duplicate a hard drive using dump and restore - Revision history

Nighthawk: /* prep target drive */

2014-06-30T14:50:52Z

‎prep target drive

Nighthawk: /* prep target drive */

2014-06-30T14:45:53Z

‎prep target drive

Nighthawk at 14:06, 30 June 2014

2014-06-30T14:06:01Z

Nighthawk: /* perform dump / restore */

2014-04-29T21:23:08Z

‎perform dump / restore

Nighthawk: /* perform dump / restore */

2014-04-29T21:22:32Z

‎perform dump / restore

Nighthawk at 21:18, 29 April 2014

2014-04-29T21:18:37Z

Nighthawk: Created page with "This guide will show you how to duplicate a hard drive's running, mounted filesystems to another drive. source drive = /dev/sda target drive = /dev/sdb == prep target drive ..."

2014-04-29T21:15:58Z

Created page with "This guide will show you how to duplicate a hard drive's running, mounted filesystems to another drive. source drive = /dev/sda target drive = /dev/sdb == prep target drive ..."

New page

This guide will show you how to duplicate a hard drive's running, mounted filesystems to another drive.

source drive = /dev/sda
target drive = /dev/sdb

== prep target drive ==

create the partitions and filesystems on the destination hard drive

from the restore man page...
Restore (rebuild) a file system. The target file system should be made pristine with mke2fs(8), mounted, and the user
cd'd into the pristine file system before starting the restoration of the initial level 0 backup.

'''list source drive partion info'''

# fdisk -l /dev/sda
<br>Disk /dev/sda: 64.0 GB, 64023257088 bytes, 125045424 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x77804419
<br> Device Boot Start End Blocks Id System
/dev/sda1 * 2048 133119 65536 83 Linux
/dev/sda2 133120 16910335 8388608 82 Linux swap / Solaris
/dev/sda3 16910336 121767935 52428800 83 Linux

'''duplicate the partition info above on the target drive'''

one limitation of using dump / restore is that the filesystem geometry must match between the source and the target drives. I use fdisk to do this. The steps aren't included here. When done your target drive partions should match the source above.

example:
# fdisk -l /dev/sdb
<br>Disk /dev/sde: 80.0 GB, 80026361856 bytes, 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x01a8acb1
<br> Device Boot Start End Blocks Id System
/dev/sde1 2048 133119 65536 83 Linux
/dev/sde2 133120 16910335 8388608 82 Linux swap / Solaris
/dev/sde3 16910336 121767935 52428800 83 Linux

== perform dump / restore ==

make temporary mount points

# mkdir /mnt/sdb1
# mkdir /mnt/sdb2

dump first partition (in this example boot)

# '''cd /mnt/sdb1'''
# '''dump -0 -f - /boot | restore -r -f -'''
DUMP: WARNING: no file `/etc/dumpdates'
DUMP: Date of this level 0 dump: Tue Apr 29 15:45:03 2014
DUMP: Dumping /dev/sda1 (/boot) to standard output
DUMP: Label: none
DUMP: Writing 10 Kilobyte records
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 24536 blocks.
DUMP: Volume 1 started with block 1 at: Tue Apr 29 15:45:03 2014
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
DUMP: Volume 1 completed at: Tue Apr 29 15:45:03 2014
DUMP: Volume 1 24580 blocks (24.00MB)
DUMP: 24580 blocks (24.00MB)
DUMP: finished in less than a second
DUMP: Date of this level 0 dump: Tue Apr 29 15:45:03 2014
DUMP: Date this dump completed: Tue Apr 29 15:45:03 2014
DUMP: Average transfer rate: 0 kB/s
DUMP: DUMP IS DONE

'''look at my pretty files'''
# '''ls -1'''
System.map-genkernel-x86_64-3.10.17-gentoo
System.map-genkernel-x86_64-3.7.9-gentoo
boot
grub
initramfs
initramfs-genkernel-x86_64-3.10.17-gentoo
initramfs-genkernel-x86_64-3.7.9-gentoo
...

jetter sde1 # ls /mnt/
sde1 sde3
jetter sde1 # mount /dev/sde3 /mnt/sde3
jetter sde1 # cd /mnt/sde3
jetter sde3 # dump -0 -f - / | restore -r -f -
DUMP: WARNING: no file `/etc/dumpdates'
DUMP: Date of this level 0 dump: Tue Apr 29 15:45:46 2014
DUMP: Dumping /dev/sda3 (/) to standard output
DUMP: Label: none
DUMP: Writing 10 Kilobyte records
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 14965465 blocks.
DUMP: Volume 1 started with block 1 at: Tue Apr 29 15:45:54 2014
DUMP: dumping (Pass III) [directories]
DUMP: dumping (Pass IV) [regular files]
restore: ./lost+found: File exists
./tmp/rstdir1398804346: (inode 614628) not found on tape
./tmp/rstmode1398804346: (inode 614629) not found on tape
DUMP: 36.90% done at 18406 kB/s, finished in 0:08
DUMP: 77.94% done at 19441 kB/s, finished in 0:02
DUMP: 98.49% done at 16232 kB/s, finished in 0:00
DUMP: Volume 1 completed at: Tue Apr 29 16:01:38 2014
DUMP: Volume 1 14918960 blocks (14569.30MB)
DUMP: Volume 1 took 0:15:44
DUMP: Volume 1 transfer rate: 15803 kB/s
DUMP: 14918960 blocks (14569.30MB)
DUMP: finished in 944 seconds, throughput 15803 kBytes/sec
DUMP: Date of this level 0 dump: Tue Apr 29 15:45:46 2014
DUMP: Date this dump completed: Tue Apr 29 16:01:38 2014
DUMP: Average transfer rate: 15803 kB/s
DUMP: DUMP IS DONE

[[category:backup]]

@@ Line 43: / Line 43: @@
 '''create filesystems'''
+  # '''mkfs /dev/sdb1'''
-  # mkfs.ext3 /dev/sdb3
+ # '''mkswap /dev/sdb2'''
   mke2fs 1.42.7 (21-Jan-2013)
   Filesystem label=

← Older revision		Revision as of 14:45, 30 June 2014
Line 42:		Line 42:
	/dev/sdb3 16910336 121767935 52428800 83 Linux		/dev/sdb3 16910336 121767935 52428800 83 Linux

		+	'''create filesystems'''
		+	#
		+	# mkfs.ext3 /dev/sdb3
		+	mke2fs 1.42.7 (21-Jan-2013)
		+	Filesystem label=
		+	OS type: Linux
		+	Block size=4096 (log=2)
		+	Fragment size=4096 (log=2)
		+	Stride=0 blocks, Stripe width=0 blocks
		+	1810432 inodes, 7228622 blocks
		+	361431 blocks (5.00%) reserved for the super user
		+	First data block=0
		+	Maximum filesystem blocks=4294967296
		+	221 block groups
		+	32768 blocks per group, 32768 fragments per group
		+	8192 inodes per group
		+	Superblock backups stored on blocks:
		+	32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
		+	4096000
		+	Allocating group tables: done
		+	Writing inode tables: done
		+	Creating journal (32768 blocks): done
		+	Writing superblocks and filesystem accounting information: done

	== perform dump / restore ==		== perform dump / restore ==

@@ Line 38: / Line 38: @@
   Disk identifier: 0x01a8acb1
   <br>  Device Boot      Start         End      Blocks   Id  System
-  /dev/sde1            2048      133119       65536   83  Linux
+  /dev/sdb1            2048      133119       65536   83  Linux
-  /dev/sde2          133120    16910335     8388608   82  Linux swap / Solaris
+  /dev/sdb2          133120    16910335     8388608   82  Linux swap / Solaris
-  /dev/sde3        16910336   121767935    52428800   83  Linux
+  /dev/sdb3        16910336   121767935    52428800   83  Linux
@@ Line 48: / Line 48: @@
   # '''mkdir /mnt/sdb1'''
-  # '''mkdir /mnt/sdb2'''
+  # '''mkdir /mnt/sdb3'''
 dump first partition (in this example boot)

@@ Line 95: / Line 95: @@
   # '''dump -0 -f - / | restore -r -f -'''
    DUMP: WARNING: no file `/etc/dumpdates'
    DUMP: Date of this level 0 dump: Tue Apr 29 15:45:46 2014

@@ Line 52: / Line 52: @@
 dump first partition (in this example boot)
   # '''cd /mnt/sdb1'''
   # '''dump -0 -f - /boot | restore -r -f -'''
@@ Line 85: / Line 86: @@
   ...
-jetter sde1 # ls /mnt/
+now for the good stuff, dumping a running root filesystem!
-sde1  sde3
-jetter sde1 # mount /dev/sde3 /mnt/sde3
+mount and cd to restore point on the target drive
-jetter sde1 # cd /mnt/sde3
+ # '''mount /dev/sdb3 /mnt/sdb3'''
-jetter sde3 # dump -0 -f - / | restore -r -f -
+ # '''cd /mnt/sdb3'''
    DUMP: WARNING: no file `/etc/dumpdates'
    DUMP: Date of this level 0 dump: Tue Apr 29 15:45:46 2014
@@ Line 118: / Line 123: @@
    DUMP: DUMP IS DONE
-now for the good stuff, dumping a running root filesystem!
   # mount /dev/sde3 /mnt/sdb3

@@ Line 14: / Line 14: @@
 '''list source drive partion info'''
-  # fdisk -l /dev/sda
+  # '''fdisk -l /dev/sda'''
   <br>Disk /dev/sda: 64.0 GB, 64023257088 bytes, 125045424 sectors
   Units = sectors of 1 * 512 = 512 bytes
@@ Line 31: / Line 31: @@
 example:
-  # fdisk -l /dev/sdb
+  # '''fdisk -l /dev/sdb'''
   <br>Disk /dev/sde: 80.0 GB, 80026361856 bytes, 156301488 sectors
   Units = sectors of 1 * 512 = 512 bytes
@@ Line 47: / Line 47: @@
 make temporary mount points
-  # mkdir /mnt/sdb1
+  # '''mkdir /mnt/sdb1'''
-  # mkdir /mnt/sdb2
+  # '''mkdir /mnt/sdb2'''
 dump first partition (in this example boot)
@@ Line 104: / Line 104: @@
 ./tmp/rstdir1398804346: (inode 614628) not found on tape
 ./tmp/rstmode1398804346: (inode 614629) not found on tape
    DUMP: 36.90% done at 18406 kB/s, finished in 0:08
    DUMP: 77.94% done at 19441 kB/s, finished in 0:02