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**mintのディスクをgingerへ移す(2016-01-22) [#s312d70b]

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):http://www.itmedia.co.jp/enterprise/0308/08/epn01_3.html]] 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、mintの
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。

 # mount /dev/sdc2 /mnt
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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