CentOS format USB flash drive

Generally, it is very easy to format a partitioned USB flash disk. you only need to use the mkfs command to specify the target file system. The example is as follows: $ fdisk-l $ mkfs-tvfat/dev/sdb112-t parameters are the target file format, other ext3, msdos and so on, the default is ext2. we can also use the following simple command to do this: mkdosfs (8 ),

Generally, it is very easy to format a partitioned USB flash disk. you only need to use the mkfs command to specify the target file system. The example is as follows:

$ fdisk -l$ mkfs -t vfat /dev/sdb1

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The-t parameter is the target file format. the other parameters include ext3 and msdos. the default value is ext2. we can also use the following simple command to complete this task:

mkdosfs(8),  mke2fs(8),  mkfs.bfs(8),  mkfs.ext2(8),  mkfs.ext3(8),  mkfs.minix(8),  mkfs.msdos(8), mkfs.vfat(8),       mkfs.xfs(8), mkfs.xiafs(8)

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After using Linux tip 3 to make a USB flash drive into a system boot disk, the USB flash drive is actually divided into two partitions.

$ fdisk -l...Disk /dev/sdb: 4009 MB, 4009754624 bytes64 heads, 32 sectors/track, 3824 cylinders, total 7831552 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x7680fe3e   Device Boot      Start         End      Blocks   Id  System/dev/sdb1   *           0     2611199     1305600   17  Hidden HPFS/NTFSDisk /dev/sdb1: 1336 MB, 1336934400 bytes64 heads, 32 sectors/track, 1275 cylinders, total 2611200 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk identifier: 0x7680fe3e     Device Boot      Start         End      Blocks   Id  System/dev/sdb1p1   *           0     2611199     1305600   17  Hidden HPFS/NTFS

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This will hide a large part of the space. it is not enough to format/dev/sdb1 only. Also format/dev/sdb so that the entire USB flash disk is formatted. However, there will be a problem:

$ mkfs -t vfat /dev/sdbmkfs.vfat 3.0.9 (31 Jan 2010)mkfs.vfat: Device partition expected, not making filesystem on entire device '/dev/sdb' (use -I to override)

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Follow the prompts to add the-I parameter:

$ mkfs.vfat -I /dev/sdbmkfs.vfat 3.0.9 (31 Jan 2010)

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Re-insert the USB flash disk, and the whole USB disk space is back.