리눅스 OS 덤프

같은 환경으로 setting 하기 위한 여러가지 방법이 있겠지만. OS덤프 작업 전 확인 할 것 과 방법이다.

[root@com ~]# time dd if=/dev/sda of=/dev/sdc -->OS 덤프

---

[root@com ~]# df -Th

Filesystem Type Size Used Avail Use% Mounted on

/dev/sda2 ext3 30G 15G 14G 53% /

/dev/sda1 ext3 289M 16M 259M 6% /boot

none tmpfs 1014M 0 1014M 0% /dev/shm

[root@com~]# cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00

Vendor: SEAGATE Model: ST336607LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 01 Lun: 00

Vendor: SEAGATE Model: ST373307LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 08 Lun: 00

Vendor: SDR Model: GEM318P Rev: 1

Type: Processor ANSI SCSI revision: 02

[root@com~]# fdisk -l

Disk /dev/sda: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 38 305203+ 83 Linux

/dev/sda2 39 3939 31334782+ 83 Linux

/dev/sda3 3940 4462 4200997+ 82 Linux swap

Disk /dev/sdb: 73.4 GB, 73407868928 bytes

255 heads, 63 sectors/track, 8924 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

[root@com ~]# cat /etc/fstab

# This file is edited by fstab-sync - see 'man fstab-sync' for details

LABEL=/ / ext3 defaults 1 1

LABEL=/boot /boot ext3 defaults 1 2

none /dev/pts devpts gid=5,mode=620 0 0

none /dev/shm tmpfs defaults 0 0

none /proc proc defaults 0 0

none /sys sysfs defaults 0 0

LABEL=SWAP-sda3 swap swap defaults 0 0

/dev/hda /media/cdrom auto pamconsole,exec,noauto,managed 0 0

/dev/fd0 /media/floppy auto pamconsole,exec,noauto,managed 0 0

[root@com ~]# echo "scsi add-single-device 0 0 2 0">/proc/scsi/scsi

* 0 0 2 0 은 channel, id, lun 값을 의미한다.

(

Host: scsi0 Channel: 00 Id: 01 Lun: 00 )

[root@com ~]# cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00

Vendor: SEAGATE Model: ST336607LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 01 Lun: 00

Vendor: SEAGATE Model: ST373307LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 08 Lun: 00

Vendor: SDR Model: GEM318P Rev: 1

Type: Processor ANSI SCSI revision: 02

Host: scsi0 Channel: 00 Id: 02 Lun: 00

Vendor: SEAGATE Model: ST336607LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

[root@com ~]# fdisk -l

Disk /dev/sda: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 38 305203+ 83 Linux

/dev/sda2 39 3939 31334782+ 83 Linux

/dev/sda3 3940 4462 4200997+ 82 Linux swap

Disk /dev/sdb: 73.4 GB, 73407868928 bytes

255 heads, 63 sectors/track, 8924 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

Disk /dev/sdc: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdc1 * 1 65 522081 83 Linux

/dev/sdc2 66 3939 31117905 83 Linux

/dev/sdc3 3940 4461 4192965 82 Linux swap

[root@com ~]# fdisk /dev/sdc

The number of cylinders for this disk is set to 4462.

There is nothing wrong with that, but this is larger than 1024,

and could in certain setups cause problems with:

1) software that runs at boot time (e.g., old versions of LILO)

2) booting and partitioning software from other OSs

(e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/sdc: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdc1 * 1 65 522081 83 Linux

/dev/sdc2 66 3939 31117905 83 Linux

/dev/sdc3 3940 4461 4192965 82 Linux swap

Command (m for help): d

Partition number (1-4): 1

Command (m for help): d

Partition number (1-4): 2

Command (m for help): d

Selected partition 3

Command (m for help): 3^H

3: unknown command

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition's system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

Command (m for help): p

Disk /dev/sdc: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

Command (m for help): wq

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@com ~]# cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00

Vendor: SEAGATE Model: ST336607LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 01 Lun: 00

Vendor: SEAGATE Model: ST373307LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

Host: scsi0 Channel: 00 Id: 08 Lun: 00

Vendor: SDR Model: GEM318P Rev: 1

Type: Processor ANSI SCSI revision: 02

Host: scsi0 Channel: 00 Id: 02 Lun: 00

Vendor: SEAGATE Model: ST336607LC Rev: 0007

Type: Direct-Access ANSI SCSI revision: 03

[root@com ~]# fdisk -l

Disk /dev/sda: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 38 305203+ 83 Linux

/dev/sda2 39 3939 31334782+ 83 Linux

/dev/sda3 3940 4462 4200997+ 82 Linux swap

Disk /dev/sdb: 73.4 GB, 73407868928 bytes

255 heads, 63 sectors/track, 8924 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

Disk /dev/sdc: 36.7 GB, 36703934464 bytes

255 heads, 63 sectors/track, 4462 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

[root@com ~]# time dd if=/dev/sda of=/dev/sdc -->OS 덤프

덤프 작업이 완료 되면 /

dev/sdc 디스크를 빼서 다른 시스템에 마운트 후 booting 해주면 된다.