XFS 파일 시스템을 축소하는 방법은 무엇입니까? [폐쇄]

sda우리는 2개의 디스크(및 sdb. 우리 는 /, /var/log입니다. 우리는 LVM과 XFS를 사용합니다.swapsda/varsdb

sda너무 크면(160GB) 40GB로 줄이고 싶습니다. 그런 다음 무료 120GB를 사용하여 확장할 수 있습니다 sdb.

[root@foo ~]# pvs
  PV         VG        Fmt  Attr PSize   PFree
  /dev/sda2  rhel      lvm2 a--  134.77g 9.77g
  /dev/sdb1  vg_var    lvm2 a--  200.00g    0


[root@foo ~]# lvs
  LV        VG        Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root      rhel      -wi-ao---- 117.19g
  swap      rhel      -wi-ao----   3.91g
  var_log   rhel      -wi-ao----   3.91g
  lv_var    vg_var    -wi-ao---- 200.00g

[root@foo ~]# fdisk -l

Disk /dev/sdb: 214.7 GB, 214748364800 bytes, 419430400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x3235298e

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048   419430399   209714176   8e  Linux LVM

Disk /dev/sda: 161.1 GB, 161061273600 bytes, 314572800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x0009b153

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     1026047      512000   83  Linux
/dev/sda2         1026048   283656191   141315072   8e  Linux LVM

Disk /dev/mapper/rhel-root: 125.8 GB, 125829120000 bytes, 245760000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/rhel-swap: 4194 MB, 4194304000 bytes, 8192000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/vg_var-lv_var: 214.7 GB, 214744170496 bytes, 419422208 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/rhel-var_log: 4194 MB, 4194304000 bytes, 8192000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

어떻게 하면 이를 안전하게 달성할 수 있습니까? 테스트 머신에서 이것을 시도했지만 실패했습니다.

1. 새 디스크 추가
2. LVM 파티션을 생성하고, PVCreate를 생성한 후 새 LV를 추가합니다.
3. 복구 디스크에서 부팅
4. 새 디스크의 LV를 마운트 sda하고 마운트합니다./mnt/sysimage/mnt/sdb
5. cp -ax /mnt/sysimage/* /mnt/sdb
6. /mnt/sysimage/etc/fstab사용하려면 업데이트하세요/dev/mapper/rhel-lv_root
7. 최종 재시작에 실패했습니다.INT18 boot failure