最終更新日: 2016-06-26 日 01:23
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Linux USBメモリの使い方

Table of Contents

デバイスの確認

wurly:~# dmesg

[784821.188523]  sdb: sdb1
[784821.189096] sd 2:0:0:0: [sdb] Attached SCSI removable disk

fdisk

fdiskを起動

wurly:~# fdisk /dev/sdb

The number of cylinders for this disk is set to 14828.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
Command (m for help):

help

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)

パーティションテーブルの表示

Command (m for help): p

Disk /dev/sdb: 16.0 GB, 16034824192 bytes
88 heads, 24 sectors/track, 14828 cylinders
Units = cylinders of 2112 * 512 = 1081344 bytes
Disk identifier: 0x7de998f2

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               4       14829    15654976    c  W95 FAT32 (LBA)

パーティションの削除

Command (m for help): d
Selected partition 1

再び、パーティションテーブルの表示

Command (m for help): p

Disk /dev/sdb: 16.0 GB, 16034824192 bytes
88 heads, 24 sectors/track, 14828 cylinders
Units = cylinders of 2112 * 512 = 1081344 bytes
Disk identifier: 0x7de998f2

   Device Boot      Start         End      Blocks   Id  System

新しいパーティションの追加

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-14828, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-14828, default 14828):
Using default value 14828

ディスクにテーブルを書き込み、終了

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

フォーマット

mkfs.ext3

wurly:~# mkfs.ext3 /dev/sdb1
mke2fs 1.41.3 (12-Oct-2008)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
979200 inodes, 3914589 blocks
195729 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4009754624
120 block groups
32768 blocks per group, 32768 fragments per group
8160 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208

Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 24 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

ラベル

ラベルの確認方法

wurly:~# e2label /dev/sdb1
usb_backup1

ラベルのつけ方

wurly:~# e2label /dev/sdb1 usb_backup1

マウント方法

ラベルを指定してマウントする

wurly:~# mount LABEL=usb_backup1 /mnt/usb_backup1

参考

過去の日記より

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