ノート/テキストマイニング
訪問者数 259      最終更新 2016-01-22 (金) 12:41:18

mintのディスクをgingerへ移す(2016-01-22)

mintから引っこ抜いて、gingerへ挿す。

gingerを立ち上げる。dmesgを見て、SATAがどのデバイスに割り振られたか確認する。

# dmesg | grep sd

[   12.069533] sd 4:0:0:0: [sda] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
[   12.069540] sd 4:0:0:0: [sda] 4096-byte physical blocks
[   12.069579] sd 4:0:0:0: [sda] Write Protect is off
[   12.069583] sd 4:0:0:0: [sda] Mode Sense: 00 3a 00 00
[   12.069599] sd 4:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   12.069659] sd 5:0:0:0: [sdb] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB)
[   12.069665] sd 5:0:0:0: [sdb] 4096-byte physical blocks
[   12.069677] sd 6:0:0:0: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)      <=== これだ
[   12.069681] sd 6:0:0:0: [sdc] 4096-byte physical blocks
[   12.069714] sd 5:0:0:0: [sdb] Write Protect is off
[   12.069718] sd 5:0:0:0: [sdb] Mode Sense: 00 3a 00 00
[   12.069721] sd 6:0:0:0: [sdc] Write Protect is off
[   12.069724] sd 6:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[   12.069736] sd 6:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   12.069743] sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   12.119393]  sda: sda1 sda2 sda3
[   12.119715] sd 4:0:0:0: [sda] Attached SCSI disk
[   12.122464]  sdb: sdb1
[   12.122724] sd 5:0:0:0: [sdb] Attached SCSI disk
[   12.685184]  sdc: sdc1 sdc2
[   12.685918] sd 6:0:0:0: [sdc] Attached SCSI disk
[   19.124306] XFS (sda2): Mounting V4 Filesystem
[   19.892988] XFS (sda2): Ending clean mount
[   19.893040] SELinux: initialized (dev sda2, type xfs), uses xattr
[  909.934717] EXT4-fs (sdc1): mounted filesystem with ordered data mode. Opts: (null)
[  909.945286] SELinux: initialized (dev sdc1, type ext4), uses xattr

/dev/sdcになっていて、sdc1とsdc2があることを確認。当然、scd1がブートパーティション)でscd2がルートだろう。

で、これをマウントしてみる。

# mount /dev/sdc2 /mnt 

mount: unknown filesystem type 'LVM2_member'

Logical Volumeの一部ということで、よくわからない。LVの扱いは初めてなので手探り。

特集:LVMによるディスクパーティションの動的化(後編) (3/5) あたりを覗きながら、様子を見る。

# vgdisplay -v

    Using volume group(s) on command line.
    Finding all volume groups.
  --- Volume group ---
  VG Name               vg_mint
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.82 TiB
  PE Size               4.00 MiB
  Total PE              476806
  Alloc PE / Size       476806 / 1.82 TiB
  Free  PE / Size       0 / 0
  VG UUID               8vfrMa-FLD5-vV1H-7pmZ-8xWv-QuAP-U8sRQH

  --- Logical volume ---
  LV Path                /dev/vg_mint/lv_root
  LV Name                lv_root
  VG Name                vg_mint
  LV UUID                WffYoG-I8gu-3YbP-PAtA-HBt0-2t96-V40Wh6
  LV Write Access        read/write
  LV Creation host, time mint.yy.is.sci.toho-u.ac.jp, 2012-11-03 15:09:30 +0900
  LV Status              available
  # open                 0
  LV Size                50.00 GiB
  Current LE             12800
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:3

  --- Logical volume ---
  LV Path                /dev/vg_mint/lv_home
  LV Name                lv_home
  VG Name                vg_mint
  LV UUID                ANQ9Aj-KnK2-Qm0O-oRpY-LXtF-6ntS-7S5Y2o
  LV Write Access        read/write
  LV Creation host, time mint.yy.is.sci.toho-u.ac.jp, 2012-11-03 15:09:40 +0900
  LV Status              available
  # open                 0
  LV Size                1.74 TiB
  Current LE             455936
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:4

 --- Logical volume ---
  LV Path                /dev/vg_mint/lv_swap
  LV Name                lv_swap
  VG Name                vg_mint
  LV UUID                3GTfzv-4nwy-1dlJ-iqf3-W0lV-Qfoo-EA5JbS
  LV Write Access        read/write
  LV Creation host, time mint.yy.is.sci.toho-u.ac.jp, 2012-11-03 15:15:56 +0900
  LV Status              available
  # open                 0
  LV Size                31.52 GiB
  Current LE             8070
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:5

  --- Physical volumes ---
  PV Name               /dev/sdc2
  PV UUID               XHdEPC-03dq-xioj-sVfG-VjuP-cDEJ-RbEie5
  PV Status             allocatable
  Total PE / Free PE    476806 / 0

  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               5.46 TiB
  PE Size               4.00 MiB
  Total PE              1430667
  Alloc PE / Size       1430652 / 5.46 TiB
  Free  PE / Size       15 / 60.00 MiB
  VG UUID               sIIgyo-VBgW-Dphb-CQcw-tQ1W-RxFB-kkMzAO

  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                eFQ5ZW-3p8V-kIZu-33bO-QGDx-9eiL-V6W00A
  LV Write Access        read/write
  LV Creation host, time ginger.yy.is.sci.toho-u.ac.jp, 2015-12-15 09:22:50 +0900
  LV Status              available
  # open                 2
  LV Size                4.00 GiB
  Current LE             1024
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1

  --- Logical volume ---
  LV Path                /dev/centos/home
  LV Name                home
  VG Name                centos
  LV UUID                ppoQV0-pblD-zRMT-mHyS-tPnq-uojL-Ac0Fpp
  LV Write Access        read/write
  LV Creation host, time ginger.yy.is.sci.toho-u.ac.jp, 2015-12-15 09:22:50 +0900
  LV Status              available
  # open                 1
  LV Size                5.40 TiB
  Current LE             1416828
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2

  --- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                LjLDIh-Vvf2-OJCx-cmgd-W6bk-Q1T4-vhvHC6
  LV Write Access        read/write
  LV Creation host, time ginger.yy.is.sci.toho-u.ac.jp, 2015-12-15 09:23:04 +0900
  LV Status              available
  # open                 1
  LV Size                50.00 GiB
  Current LE             12800
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Physical volumes ---
  PV Name               /dev/sda3
  PV UUID               Y2Jchq-M6IK-5RKA-5OJX-rU4q-qtPh-PzqMUJ
  PV Status             allocatable
  Total PE / Free PE    715271 / 15

  PV Name               /dev/sdb1
  PV UUID               lbQ84v-TRy2-y6HH-6K6I-exiU-EnD6-VO58f6
  PV Status             allocatable
  Total PE / Free PE    715396 / 0

ということで、非常にラッキーだったのは、mintから抜いてきたディスクのVolumeGroup名がmintで、gingerをインストールした方のディスクはVolumeGroup名がCentosになっていたこと。同じだったらかなりやばいのかも。

というところで、ロジカルボリューム/dev/vg_mint/lv_rootと/dev/vg_mint/lv_homeを使えばいいということらしい。

# mount /dev/vg_mint/lv_home /mnt/mint_home
# ls /mnt/mint_home
<正しいユーザホーム>

# mount /dev/vg_mint/lv_root /mnt/mint_root
# ls /mnt/mint_root
bin   cgroup  etc   lib    lost+found  misc  net  proc  sbin     srv  tmp  var
boot  dev     home  lib64  media       mnt   opt  root  selinux  sys  usr

というわけで、見られるようになった。


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Last-modified: 2016-01-22 (金) 12:41:18 (609d)