前回の記事にてCentOS6でxfsを有効にした。
www.unknownengineer.net
折角なのでxfsファイルシステムでフォーマットして、そのまま使ってみることにした。
目次
追加したディスクを認識させる
まずは対象VMに2GBのディスクを追加しました。これをxfsでフォーマットします。VM上から追加したんですが、"dmesg |grep sdb"で何も表示されない。どうやら認識されていないようですね。
# cat /proc/scsi/scsi Attached devices: Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02
Virtual disk側のhost:scsi2を覚えておきます。以下コマンドで追加したディスクを認識させます。
# echo "- - -" > /sys/class/scsi_host/host2/scan # cat /proc/scsi/scsi Attached devices: Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00 Type: CD-ROM ANSI SCSI revision: 05 Host: scsi2 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: 01 Lun: 00 Vendor: VMware Model: Virtual disk Rev: 1.0 Type: Direct-Access ANSI SCSI revision: 02 # dmesg |grep sdb sd 2:0:1:0: [sdb] 4194304 512-byte logical blocks: (2.15 GB/2.00 GiB) sd 2:0:1:0: [sdb] Write Protect is off sd 2:0:1:0: [sdb] Mode Sense: 61 00 00 00 sd 2:0:1:0: [sdb] Cache data unavailable sd 2:0:1:0: [sdb] Assuming drive cache: write through sd 2:0:1:0: [sdb] Attached SCSI disk
xfsでフォーマットする
まずxfsを操作するコマンドを使うために、xfsprogsをインストールします。
# yum install xfsprogs
それではfdiskでパーティションを作っていきます。
# 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 0x07f45e64.
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): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition's system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)
Command (m for help): p
Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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: 0x07f45e64
Device Boot Start End Blocks Id System
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-261, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-261, default 261):
Using default value 261
Command (m for help): p
Disk /dev/sdb: 2147 MB, 2147483648 bytes
255 heads, 63 sectors/track, 261 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: 0x07f45e64
Device Boot Start End Blocks Id System
/dev/sdb1 1 261 2096451 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
# cat /proc/partitions
major minor #blocks name
1 0 16384 ram0
1 1 16384 ram1
1 2 16384 ram2
1 3 16384 ram3
1 4 16384 ram4
1 5 16384 ram5
1 6 16384 ram6
1 7 16384 ram7
1 8 16384 ram8
1 9 16384 ram9
1 10 16384 ram10
1 11 16384 ram11
1 12 16384 ram12
1 13 16384 ram13
1 14 16384 ram14
1 15 16384 ram15
11 0 1048575 sr0
8 0 26214400 sda
8 1 102400 sda1
8 2 1048576 sda2
8 3 25058047 sda3
8 16 2097152 sdb
8 17 2096451 sdb1
作ったパーティションにファイルシステムを作って行きます。当然今回はxfsで作ります。
# mkfs -t xfs /dev/sdb1
meta-data=/dev/sdb1 isize=256 agcount=4, agsize=131028 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=524112, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
作成したsdb1をmountします。
# mkfs -t xfs /dev/sdb1
meta-data=/dev/sdb1 isize=256 agcount=4, agsize=131028 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=524112, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
# mkdir -p /mnt/xfs_vol
# mount /dev/sdb1 /mnt/xfs_vol/
# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda3 ext4 24535160 11433376 11832504 50% /
tmpfs tmpfs 1027412 0 1027412 0% /dev/shm
/dev/sda1 ext4 95054 92576 0 100% /boot
/dev/sdb1 xfs 2086208 32928 2053280 2% /mnt/xfs_vol
作成した/dev/sdb1がxfsでmountされているのが確認出来ました。イェイ。