追加したディスクを認識させて利用できるように設定する方法
HDDの容量が足りなくなってディスクを追加したはいいものの、認識されなくて使えない場合にやった解決法です
1. ディスク追加
追加前
# cat /proc/scsi/scsi Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05
追加後
認識させる(hot add)
# echo "- - -" > /sys/class/scsi_host/host0/scan # cat /proc/scsi/scsi Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05 Host: scsi0 Channel: 00 Id: 01 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02
- 追加したHDD情報が表示されている(今回は/dev/sdb)
2. パーティション設定
設定
# /sbin/fdisk /dev/sdb Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel Building a new DOS disklabel with disk identifier 0x6f42ab55. Changes will remain in memory only, until you decide to write them. After that, of course, the previous content won't be recoverable. Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite) WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): > n Command action e extended p primary partition (1-4) > p Partition number (1-4): 1 First cylinder (1-13054, default 1): Using default value 1 Last cylinder, +cylinders or +size{K,M,G} (1-13054, default 13054): Using default value 13054 Command (m for help): > w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
確認
# /sbin/fdisk /dev/sdb Command (m for help): > p Disk /dev/sdb: 107.4 GB, 107374182400 bytes 255 heads, 63 sectors/track, 13054 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x6f42ab55 Device Boot Start End Blocks Id System /dev/sdb1 1 13054 104856223+ 83 Linux # ls -altr /dev/sd*
3. ファイルシステム作成
今回はext3を利用
ファイルシステム作成
# /sbin/mkfs.ext3 -c /dev/sdb1 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 6553600 inodes, 26214055 blocks 1310702 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 800 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872 Checking for bad blocks (read-only test): done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 34 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override.
作成したファイルシステムを利用する設定を記述
# cp -ip /etc/fstab /etc/fstab_bk # vi /etc/fstab ===以下を追加======================================================================================= /dev/sdb1 /extra_disk ext3 defaults,noatime,data=writeback 1 2 ===以上を追加=======================================================================================
- /extra_distのところは好きな場所や名前を設定してください
4. マウント
# mount -a # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 26G 7.5G 17G 32% / tmpfs 1004M 12K 1004M 1% /dev/shm /dev/sda1 485M 53M 407M 12% /boot none 1004M 16K 1004M 1% /tmp /dev/sdb1 99G 188M 94G 1% /roma
以上です。
