USB에 복사한 linux OS 시스템의 파일을 사용하는 방법

백업을 위하여 USB에 linux OS 시스템을 복사하였다. 복사하는 방법은 아래의 링크를 이용하여 수행할 수 있다.

 

https://namsaenga.tistory.com/47

dd command를 이용하여 Linux OS 시스템을 USB로 복사하기

 

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linux OS 시스템 USB를 마운트 하여 파일을 이용하는 절차

 

 

1. 일반 mount 명령어로 lvm을 마운트 하면 오류가 발생한다.

[root@localhost ~]# mount /dev/sdb3 /mnt/usb
mount: /mnt/usb: unknown filesystem type 'LVM2_member'.

2. lvm2를 설치한다.

[root@localhost ~]# yum install lvm2

3. 디바이스 인식을 위한 모듈을 로드한다.

[root@localhost ~]# modprobe dm-mod

4. lvm 볼륨 그룹 스캔

[root@localhost ~]# vgscan
  WARNING: VG name rhel is used by VGs EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g and L3JoDa-tXqP-ZM9i-38tQ-T6KX-Ucsc-M4wyvU.
  Fix duplicate VG names with vgrename uuid, a device filter, or system IDs.
  Found volume group "rhel" using metadata type lvm2
  Found volume group "rhel" using metadata type lvm2

5. 원하는 디바이스의 UUID 확인

[root@localhost ~]# vgs -o +vg_uuid --config 'devices { filter = [ "a|/dev/sdb|", "r|.*|" ]}'
  VG   #PV #LV #SN Attr   VSize  VFree VG UUID                               
  rhel   1   3   0 wz--n- 57.41g    0  EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g
[root@localhost ~]# vgs -o +vg_uuid --config 'devices { filter = [ "a|/dev/sda|", "r|.*|" ]}'
  VG   #PV #LV #SN Attr   VSize  VFree VG UUID                               
  rhel   1   3   0 wz--n- 57.41g    0  L3JoDa-tXqP-ZM9i-38tQ-T6KX-Ucsc-M4wyvU

6. UUID를 이용하여 lvm 볼륨을 활성화 상태로 변경

[root@localhost ~]# vgchange -ay --select vg_uuid=EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g
  WARNING: VG name rhel is used by VGs EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g and L3JoDa-tXqP-ZM9i-38tQ-T6KX-Ucsc-M4wyvU.
  Fix duplicate VG names with vgrename uuid, a device filter, or system IDs.
  WARNING: activating multiple VGs with the same name is dangerous and may fail.
  device-mapper: create ioctl on rhel-swap LVM-EcszOlUcTaDbFRpc6MHPzeUdqI3Cdd2gsBGJzwu0zJ2zfWVfp1UqGfNzTxBFvToZ failed: 장치나 자원이 동작 중
  device-mapper: create ioctl on rhel-home LVM-EcszOlUcTaDbFRpc6MHPzeUdqI3Cdd2g2HjoGC3PxKIPk8R5mGY1xB8f2gmwBC0f failed: 장치나 자원이 동작 중
  device-mapper: create ioctl on rhel-root LVM-EcszOlUcTaDbFRpc6MHPzeUdqI3Cdd2ghLNWmJJIhR3NSNo93yXkdjXdkOqKHkJl failed: 장치나 자원이 동작 중
  0 logical volume(s) in volume group "rhel" now active
  WARNING: activating multiple VGs with the same name is dangerous and may fail.

 

7.  UUID를 이용하여 USB(/dev/sdb)를 rhel2로 변경

[root@localhost ~]# vgrename EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g rhel2
  WARNING: VG name rhel is used by VGs EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g and L3JoDa-tXqP-ZM9i-38tQ-T6KX-Ucsc-M4wyvU.
  Fix duplicate VG names with vgrename uuid, a device filter, or system IDs.
  Processing VG rhel because of matching UUID EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g
  Volume group "EcszOl-UcTa-DbFR-pc6M-HPze-UdqI-3Cdd2g" successfully renamed to "rhel2"

8. rhel2 활성화

[root@localhost ~]# vgchange -ay rhel2
  3 logical volume(s) in volume group "rhel2" now active

9. /dev/mapper에서 rhel2가 잘 활성화 되었는지 확인

[root@localhost ~]# fdisk -l

Disk /dev/sdb: 114.6 GiB, 123048296448 bytes, 240328704 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
Disklabel type: gpt
Disk identifier: 135E2228-14FC-436A-A2DF-BAEB437F84B5

Device       Start       End   Sectors  Size Type
/dev/sdb1     2048   1230847   1228800  600M EFI System
/dev/sdb2  1230848   3327999   2097152    1G Linux filesystem
/dev/sdb3  3328000 123729919 120401920 57.4G Linux LVM


Disk /dev/mapper/rhel2-swap: 5.9 GiB, 6337593344 bytes, 12378112 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 /dev/mapper/rhel2-home: 16.9 GiB, 18144559104 bytes, 35438592 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 /dev/mapper/rhel2-root: 34.6 GiB, 37161533440 bytes, 72581120 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

 

9. 마운트하기

[root@localhost ~]# mount /dev/rhel2/home /mnt/usb

 

10. 마운트 확인

[root@localhost ~]# ls /mnt/usb
namsaenga
[root@localhost namsaenga]# ls
hi  hiroo  공개  다운로드  문서  바탕화면  비디오  사진  서식  음악