☰

요청 시 제공되는 추가 진단 정보:

tag-icon • tag-icon ubuntu mdadm raid0
요청 시 제공되는 추가 진단 정보:

Sony Vaio VGN-AW47GH 노트북에서 친구의 데이터를 복구하려고 합니다. 여기에는 Toshiba MK5055GS 2.5인치 500GB HDD(내가 읽은 내용) 한 쌍이 1TB RAID0으로 결합되어 있습니다. 노트북이 더 이상 작동하지 않아서 Ubuntu 14.04 시스템으로 가져오려고 합니다.

/etc/mdadm/mdadm.confUbuntu를 통해 RAID0을 설치할 수 있도록 하려면 파일 구문에 대한 도움이 필요합니다 . mdadm.conf매뉴얼 페이지와 온라인 검색에서는 이를 조정하는 방법이 명확하지 않았기 때문에 친숙한 누군가가 나에게 올바른 방향을 알려줄 수 있기를 바랍니다 .

그들은 /dev/sda&로 나타나고 실행 후 /dev/sdb다음을 얻습니다.mdadm examine/scanmdadm --assemble --scan

# mdadm --examine --scan /dev/sda
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
ARRAY metadata=imsm UUID=99fcd315:2ac78f08:08014b0a:33f4585f
ARRAY /dev/md/Volume0 container=99fcd315:2ac78f08:08014b0a:33f4585f member=0 UUID=245d2401:2ad11a3c:6edacb92:47ce3340

결과 확인/스캔/dev/sdb

# mdadm --examine --scan /dev/sdb
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
ARRAY metadata=imsm UUID=99fcd315:2ac78f08:08014b0a:33f4585f
ARRAY /dev/md/Volume0 container=99fcd315:2ac78f08:08014b0a:33f4585f member=0 UUID=245d2401:2ad11a3c:6edacb92:47ce3340

--scan 옵션이 없는 결과는 다음과 같습니다.

# mdadm --examine /dev/sda
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
/dev/sda: 
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.0.00
    Orig Family : 08b9238d
         Family : 08b9238d
     Generation : 00001c59
     Attributes : All supported
           UUID : 99fcd315:2ac78f08:08014b0a:33f4585f
       Checksum : 1b2c84f0 correct
    MPB Sectors : 1
          Disks : 2
   RAID Devices : 1

  Disk01 Serial : 9934C0KIT
          State : active
             Id : 00040000
    Usable Size : 976768264 (465.76 GiB 500.11 GB)

[Volume0]: 
           UUID : 245d2401:2ad11a3c:6edacb92:47ce3340
     RAID Level : 0
        Members : 2
          Slots : [_U]
    Failed disk : 0
      This Slot : 1
     Array Size : 1953536000 (931.52 GiB 1000.21 GB)
   Per Dev Size : 976768264 (465.76 GiB 500.11 GB)
  Sector Offset : 0
    Num Stripes : 3815500
     Chunk Size : 128 KiB
       Reserved : 0
  Migrate State : idle
      Map State : normal
    Dirty State : clean

  Disk00 Serial : 9934C0KJT
          State : active failed
             Id : 00000000
    Usable Size : 976768264 (465.76 GiB 500.11 GB)[/CODE]

/dev/sdb 결과 확인

# mdadm --examine /dev/sdb
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
/dev/sdb:
          Magic : Intel Raid ISM Cfg Sig.
        Version : 1.0.00
    Orig Family : 08b9238d
         Family : 08b9238d
     Generation : 00001c59
     Attributes : All supported
           UUID : 99fcd315:2ac78f08:08014b0a:33f4585f
       Checksum : 1b2c84f0 correct
    MPB Sectors : 1
          Disks : 2
   RAID Devices : 1

[Volume0]:
           UUID : 245d2401:2ad11a3c:6edacb92:47ce3340
     RAID Level : 0
        Members : 2
          Slots : [_U]
    Failed disk : 0
      This Slot : ?
     Array Size : 1953536000 (931.52 GiB 1000.21 GB)
   Per Dev Size : 976768264 (465.76 GiB 500.11 GB)
  Sector Offset : 0
    Num Stripes : 3815500
     Chunk Size : 128 KiB
       Reserved : 0
  Migrate State : idle
      Map State : normal
    Dirty State : clean

  Disk00 Serial : 9934C0KJT
          State : active failed
             Id : 00000000
    Usable Size : 976766862 (465.76 GiB 500.10 GB)

  Disk01 Serial : 9934C0KIT
          State : active
             Id : 00040000
    Usable Size : 976766862 (465.76 GiB 500.10 GB)

dev에 /dev/md/Volume0 파일이 없는 것 같습니다. 이제 일부 md 파일이 있습니다.

# ls -la /dev/md* | grep md
brw-rw---- 1 root disk 9, 126 May 24 22:05 /dev/md126
brw-rw---- 1 root disk 9, 127 May 25 22:27 /dev/md127
/dev/md:
lrwxrwxrwx  1 root root    8 May 25 22:27 imsm0 -> ../md127

/dev/md126의 경우

# mdadm --examine --scan /dev/md126
mdadm: ARRAY line /dev/md/imsm0 has no identity information.

/dev/md17의 경우

# mdadm --examine --scan /dev/md127
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
ARRAY metadata=imsm UUID=99fcd315:2ac78f08:08014b0a:33f4585f
ARRAY /dev/md/Volume0 container=99fcd315:2ac78f08:08014b0a:33f4585f member=0 UUID=245d2401:2ad11a3c:6edacb92:47ce3340

요청 시 제공되는 추가 진단 정보:

# mdadm --assemble --scan
mdadm: ARRAY line /dev/md/imsm0 has no identity information.
mdadm: Container /dev/md126 has been assembled with 2 drives

# cat /proc/mdstat
Personalities : [raid10] [raid1] [raid6] [raid5] [raid4] [linear] [multipath] [raid0] 
md126 : inactive sdb[1](S) sda[0](S)
      5605 blocks super external:imsm

unused devices: <none>

# ls -la /dev/md*
brw-rw---- 1 root disk 9, 126 Jun  8 19:46 /dev/md126

# mount -o ro /dev/md126 /mnt
mount: /dev/md126: can't read superblock

# mdadm --stop /dev/md126
mdadm: stopped /dev/md126

# mdadm --assemble /dev/md0 --verbose --force /dev/sd[ab]
mdadm: looking for devices for /dev/md0
mdadm: /dev/sda is identified as a member of /dev/md0, slot -1.
mdadm: /dev/sdb is identified as a member of /dev/md0, slot -1.
mdadm: Marking array /dev/md0 as 'clean'
mdadm: added /dev/sdb to /dev/md0 as -1
mdadm: added /dev/sda to /dev/md0 as -1
mdadm: Container /dev/md0 has been assembled with 2 drives

# cat /proc/mdstat
Personalities : [raid10] [raid1] [raid6] [raid5] [raid4] [linear] [multipath] [raid0] 
md0 : inactive sda[1](S) sdb[0](S)
      5605 blocks super external:imsm

unused devices: <none>

# mdadm --readonly /dev/md0

# mount -o ro /dev/md0 /mnt
mount: /dev/md0: can't read superblock

2016년 12월 6일 업데이트됨

재부팅으로 인해 장치가 sda 및 sdb에서 sdg 및 sdi로 다시 섞였습니다. 죄송합니다. 모든 것을 중지하고 다음과 같이 실행하기 전까지는 -I 옵션을 시도할 기회가 없었습니다. IMSM_NO_PLATFORM 환경 설정도 포함했는데 재부팅 시 기본적으로 어디에 설정되어 있는지 잊어버렸습니다.

# export IMSM_NO_PLATFORM=1         # Allow mdadm to access/modify an IMSM array

# mdadm --stop /dev/md0

# mdadm -I /dev/sdg --verbose
mdadm: container /dev/md/imsm0 now has 1 device
mdadm: not enough devices to start the container

# mdadm -I /dev/sdi --verbose
mdadm: container /dev/md/imsm0 now has 2 devices
mdadm: not enough devices to start the container

# mdadm --query --detail /dev/md/imsm0
/dev/md/imsm0:
        Version : imsm
     Raid Level : container
  Total Devices : 2
Working Devices : 2
           UUID : 99fcd315:2ac78f08:08014b0a:33f4585f
  Member Arrays :
    Number   Major   Minor   RaidDevice
       0       8       96        -        /dev/sdg
       1       8      128        -        /dev/sdi

# mdadm --query /dev/md/imsm0
/dev/md/imsm0: 0.00KiB (null) 0 devices, 2 spares. Use mdadm --detail for more detail.

# mdadm -I /dev/md/imsm0 --verbose
mdadm: not enough devices to start the container

# mdadm --assemble --scan
mdadm: array /dev/md/Volume0_0 now has 1 device
mdadm: No arrays found in config file or automatically

# ls -la /dev/md*
brw-rw---- 1 root disk 9, 126 Jun 12 17:02 /dev/md126
brw-rw---- 1 root disk 9, 127 Jun 12 17:00 /dev/md127
/dev/md:
total 0
drwxr-xr-x  2 root root   60 Jun 12 17:00 .
drwxr-xr-x 18 root root 5000 Jun 12 17:02 ..
lrwxrwxrwx  1 root root    8 Jun 12 17:00 imsm0 -> ../md127

# mdadm --query --detail  /dev/md126
/dev/md126:
      Container : /dev/md/imsm0, member 0
     Raid Level : raid0
   Raid Devices : 2
  Total Devices : 1
          State : active, FAILED, Not Started 
 Active Devices : 1
Working Devices : 1
 Failed Devices : 0
  Spare Devices : 0
     Chunk Size : 128K
           UUID : 245d2401:2ad11a3c:6edacb92:47ce3340
    Number   Major   Minor   RaidDevice State
       0       0        0        0      removed
       0       8       96        1      active sync   /dev/sdg

따라서 누락된(제거된) 장치와 일반 /dev/sdg 장치가 있는 imsm0 컨테이너에 액세스한 것 같습니다. 분실한 장치를 식별하고 다시 추가하는 방법에 대한 아이디어가 있나요?

모든 (건설적인) 의견에 크게 감사드립니다!

관련 정보