복원된 VG의 볼륨이 변경되었습니다.

여러 LV가 포함된 단일 VG를 사용하여 mdadm RAID 1에서 PV를 복구하고 있습니다.

기본 장치에는 불량 섹터가 몇 개 있었고(하나는 몇 개, 다른 하나는 많았음) 어리석은 오타로 인해 LVM 구성을 복원하기 위해 장치를 grep해야 했습니다. 운 좋게도 그것을 찾았고 복원된 구성은 원래 구성과 동일해 보입니다.

유일한 문제는 논리 볼륨에 유효한 파일 시스템이 없다는 것입니다. e2sl을 사용하여 대상 파일 시스템의 슈퍼블록 중 하나가 잘못된 논리 볼륨에 있음을 발견했습니다. 불행히도 저는 이 문제를 해결하거나 회피하는 방법을 모릅니다.

root@rescue ~/e2sl # ./ext2-superblock -d /dev/vg0/tmp  | grep 131072000
Found: block 20711426 (cyl 1369, head 192, sector 50), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
root@rescue ~/e2sl # ./ext2-superblock -d /dev/vg0/home | grep 131072000
Found: block 2048 (cyl 0, head 32, sector 32), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 526336 (cyl 34, head 194, sector 34), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 1050624 (cyl 69, head 116, sector 36), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 1574912 (cyl 104, head 38, sector 38), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 2099200 (cyl 138, head 200, sector 40), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 6293504 (cyl 416, head 56, sector 56), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 6817792 (cyl 450, head 218, sector 58), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 12584960 (cyl 832, head 81, sector 17), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 20973568 (cyl 1387, head 33, sector 49), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 32507904 (cyl 2149, head 238, sector 30), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 63440896 (cyl 4195, head 198, sector 22), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
Found: block 89655296 (cyl 5929, head 139, sector 59), 131072000 blocks, 129988776 free blocks, 4096 block size, (null)
^C

백업되지 않은 일부 데이터를 복구하기 위해 파일 시스템에 다시 액세스하는 단계가 한 단계만 남은 것 같습니다.

LVM 구성:

root@rescue ~ # pvs
  PV         VG   Fmt  Attr PSize PFree
  /dev/md1   vg0  lvm2 a--  2.71t 767.52g

root@rescue ~ # vgs
  VG   #PV #LV #SN Attr   VSize VFree
  vg0    1   5   0 wz--n- 2.71t 767.52g

root@rescue ~ # lvs
  LV        VG   Attr     LSize   Pool Origin Data%  Move Log Copy%  Convert
  backup    vg0  -wi-a--- 500.00g
  container vg0  -wi-a--- 500.00g
  home      vg0  -wi-a--- 500.00g
  root      vg0  -wi-a--- 500.00g
  tmp       vg0  -wi-a---  10.00g

VG 구성:

# Generated by LVM2 version 2.02.95(2) (2012-03-06): Sun Oct 13 23:56:33 2013

contents = "Text Format Volume Group"
version = 1

description = "Created *after* executing 'vgs'"

creation_host = "rescue"        # Linux rescue 3.10.12 #29 SMP Mon Sep 23 13:18:39 CEST 2013 x86_64
creation_time = 1381701393      # Sun Oct 13 23:56:33 2013

vg0 {
    id = "7p0Aiw-pBpd-rn6Y-geFb-jyZe-gide-Anc9ag"
    seqno = 19
    format = "lvm2" # informational
    status = ["RESIZEABLE", "READ", "WRITE"]
    flags = []
    extent_size = 8192              # 4 Megabytes
    max_lv = 0
    max_pv = 0
    metadata_copies = 0

    physical_volumes {

            pv0 {
                    id = "GBIwI4-AxBa-6faf-aLfB-UZiP-iSS9-FaOrhH"
                    device = "/dev/md1"     # Hint only

                    status = ["ALLOCATABLE"]
                    flags = []
                    dev_size = 5824875134   # 2.71242 Terabytes
                    pe_start = 384
                    pe_count = 711044       # 2.71242 Terabytes
            }
    }

    logical_volumes {

            root {
                    id = "1e3gvq-IJnX-Aimz-ziiY-zucE-soCO-YU2ayp"
                    status = ["READ", "WRITE", "VISIBLE"]
                    flags = []
                    segment_count = 1

                    segment1 {
                            start_extent = 0
                            extent_count = 128000   # 500 Gigabytes

                            type = "striped"
                            stripe_count = 1        # linear

                            stripes = [
                                    "pv0", 0
                            ]
                    }
            }
            tmp {
                    id = "px8JAy-JnkP-Amry-uHtf-lCUB-rfdx-Z8y11y"
                    status = ["READ", "WRITE", "VISIBLE"]
                    flags = []
                    segment_count = 1

                    segment1 {
                            start_extent = 0
                            extent_count = 2560     # 10 Gigabytes

                            type = "striped"
                            stripe_count = 1        # linear

                            stripes = [
                                    "pv0", 128000
                            ]
                    }
            }

            home {
                    id = "e0AZbd-22Ss-RLrF-TgvF-CSDN-Nw6w-Gj7dal"
                    status = ["READ", "WRITE", "VISIBLE"]
                    flags = []
                    segment_count = 1

                    segment1 {
                            start_extent = 0
                            extent_count = 128000   # 500 Gigabytes

                            type = "striped"
                            stripe_count = 1        # linear

                            stripes = [
                                    "pv0", 130560
                            ]
                    }
            }

            backup {
                    id = "ZXNcbK-gYKj-LJfm-f193-Ozsi-Rm3Y-kZL37c"
                    status = ["READ", "WRITE", "VISIBLE"]
                    flags = []
                    creation_host = "new.bountin.net"
                    creation_time = 1341852222      # 2012-07-09 18:43:42 +0200
                    segment_count = 1

                    segment1 {
                            start_extent = 0
                            extent_count = 128000   # 500 Gigabytes

                            type = "striped"
                            stripe_count = 1        # linear

                            stripes = [
                                    "pv0", 258560
                            ]
                    }
            }

         container {
                    id = "X9wheh-3ADB-Fiau-j7SR-pcH9-hXne-K2NVAc"
                    status = ["READ", "WRITE", "VISIBLE"]
                    flags = []
                    creation_host = "new.bountin.net"
                    creation_time = 1341852988      # 2012-07-09 18:56:28 +0200
                    segment_count = 1

                    segment1 {
                            start_extent = 0
                            extent_count = 128000   # 500 Gigabytes

                            type = "striped"
                            stripe_count = 1        # linear

                            stripes = [
                                    "pv0", 386560
                            ]
                    }
            }
    }
}