LinuC（Linux技術者認定資格）＆リナックスサーバ構築設定事例

[root@A]# fdisk -l /dev/sda
Disk /dev/sda: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = シリンダ数 of 16065 * 512 = 8225280 bytes
デバイス Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14        1044     8281507+  8e  Linux LVM

[root@A]# cat /proc/mdstat
Personalities :
unused devices: <none>

[root@A]# lvscan
  /dev/cdrom: read failed after 0 of 2048 at 0: 入力/出力エラーです
  ACTIVE            '/dev/VolGroup00/LogVol00' [4.00 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol03' [1.00 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol02' [1.00 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [1.00 GB] inherit

[root@A]# df -T
Filesystem    Type   1K-ブロック    使用   使用可 使用% マウント位置
/dev/mapper/VolGroup00-LogVol00
              ext3     4062912   3460740    392460  90% /
/dev/mapper/VolGroup00-LogVol03
              ext3     1015704     88808    874468  10% /tmp
/dev/mapper/VolGroup00-LogVol02
              ext3     1015704    274912    688364  29% /var
/dev/sda1     ext3      101086     12074     83793  13% /boot
tmpfs        tmpfs      257720         0    257720   0% /dev/shm
/dev/mapper/VolGroup00-LogVol02
              ext3     1015704    274912    688364  29% /mnt

[root@A]# ls -l /dev/mapper/VolGroup00-LogVol0*
brw-rw---- 1 root disk 253, 0  1月  5 21:15 /dev/mapper/VolGroup00-LogVol00
brw-rw---- 1 root disk 253, 3  1月  5 21:15 /dev/mapper/VolGroup00-LogVol01
brw-rw---- 1 root disk 253, 2  1月  5 21:15 /dev/mapper/VolGroup00-LogVol02
brw-rw---- 1 root disk 253, 1  1月  5 21:15 /dev/mapper/VolGroup00-LogVol03

[root@A]# pvdisplay /dev/sda2
  /dev/cdrom: read failed after 0 of 2048 at 0: 入力/出力エラーです
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               VolGroup00
  PV Size               7.90 GB / not usable 23.41 MB
  Allocatable           yes
  PE Size (KByte)       32768
  Total PE              252
  Free PE               28
  Allocated PE          224
  PV UUID               NZOvJm-9UF6-sXaW-y1Fd-1pJ0-fpzW-OVk750

[root@A]# pvscan
  /dev/cdrom: open failed: 読み込み専用ファイルシステムです
  Attempt to close device '/dev/cdrom' which is not open.
  PV /dev/sda2   VG VolGroup00   lvm2 [7.88 GB / 896.00 MB free]
  Total: 1 [7.88 GB] / in use: 1 [7.88 GB] / in no VG: 0 [0   ]

[root@A]# vgdisplay
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                4
  Open LV               4
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               7.88 GB
  PE Size               32.00 MB
  Total PE              252
  Alloc PE / Size       224 / 7.00 GB
  Free  PE / Size       28 / 896.00 MB
  VG UUID               V9Kj8z-YYNg-1nxg-WqfE-0c9v-kDrM-HlQ2Rs

[root@A]# lvdisplay /dev/VolGroup00/LogVol02
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol02
  VG Name                VolGroup00
  LV UUID                JTByn9-eKq8-61Kj-f8Y0-aggW-gX1x-fo4XQa
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.00 GB
  Current LE             32
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2

[root@A]# pvs
  PV         VG         Fmt  Attr PSize PFree
  /dev/sda2  VolGroup00 lvm2 a-   7.88G 896.00M

[root@A]# vgs
  VG         #PV #LV #SN Attr   VSize VFree
  VolGroup00   1   4   0 wz--n- 7.88G 896.00M

[root@A]# lvs
  LV       VG         Attr   LSize Origin Snap%  Move Log Copy%  Convert
  LogVol00 VolGroup00 -wi-ao 4.00G
  LogVol01 VolGroup00 -wi-ao 1.00G
  LogVol02 VolGroup00 -wi-ao 1.00G
  LogVol03 VolGroup00 -wi-ao 1.00G

[root@A]# hdparm /dev/sda
/dev/sda:
 readonly     =  0 (off)
 readahead    = 256 (on)
 geometry     = 1044/255/63, sectors = 16777216, start = 0

[root@A]# hdparm -tT /dev/sda
/dev/sda:
 Timing cached reads:   30276 MB in  2.00 seconds = 15175.83 MB/sec
 Timing buffered disk reads:   74 MB in  3.09 seconds =  23.98 MB/sec