Create a CentOS 6.4 U disk boot installation disk

The used USB flash drive is Kingston16G,/dev/sdb. The default partition is/dev/sdb4.

Recommended reading:

CentOS6.4X86 _ 64 detailed version of system installation customization documentation

Install CentOS 6.4 on XP and Linux dual-system hard disks

Windows 8 and CentOS 6.4 (64) Dual-system hard drive installation tutorial

The following describes how to partition the USB flash drive. The first partition is FAT32, and the computer is guided to install the system. The second partition is EXT2, which stores the system ISO file.

Delete original Partition

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[Root @ localhost ~] # Fdisk/dev/sdb

WARNING: DOS-compatible mode is deprecated. It's stronugly recommended
Switch off the mode (command 'C') and change display units
Sectors (command 'U ').

Command (m for help): d
Selected partition 4

Command (m for help): p

Disk/dev/sdb: 15.5 GB, 15479597056 bytes
255 heads, 63 sectors/track, 1881 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: 0xcad4ebea

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 (1-1881, default 1 ):
Using default value 1
Last cylinder, + cylinders or + size {K, M, G} (1-1881, default 1881): + 250 M

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): l

0 Empty 24 nec dos 81 Minix/old Lin bf Solaris
1 FAT12 39 Plan 9 82 Linux swap/So c1 DRDOS/sec (FAT-
2 XENIX root 3c PartitionMagic 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 40 Venix 80286 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32 M 41 PPC PReP Boot 85 Linux extended c7 syr.pdf
5 Extended 42 SFS 86 NTFS volume set da Non-FS data
6 FAT16 4d QNX4.x 87 NTFS volume set db CP/M/CTOS /.
7 HPFS/NTFS 4e QNX4.x 2nd part 88 Linux plaintext de Dell Utility
8 AIX 4f QNX4.x 3rd part 8e Linux LVM df BootIt
9 AIX bootable 50 OnTrack DM 93 Amoeba e1 DOS access
A OS/2 Boot Manag 51 OnTrack DM6 Aux 94 Amoeba BBT e3 DOS R/O
B W95 FAT32 52 CP/M 9f BSD/OS e4 SpeedStor
C W95 FAT32 (LBA) 53 OnTrack DM6 Aux a0 IBM Thinkpad hi eb BeOS fs
E W95 FAT16 (LBA) 54 OnTrackDM6 a5 FreeBSD ee GPT
F W95 Ext 'd (LBA) 55 EZ-Drive a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 56 Golden Bow a7 NeXTSTEP f0 Linux/PA-RISC B
11 Hidden FAT12 5c Priam Edisk a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 61 SpeedStor a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 63 gnu hurd or Sys AB Darwin boot f2 DOS secondary
16 Hidden FAT16 64 Novell Netware af HFS/HFS + fb VMware VMFS
17 Hidden HPFS/NTF 65 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 70 DiskSecure Mult b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 75 PC/IX bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 80 Old Minix be Solaris boot ff BBT
1e Hidden W95 FAT1
Hex code (type L to list codes): B
Changed system type of partition 1 to B (W95 FAT32)

Command (m for help): n
Command action
E extended
P primary partition (1-4)
P
Partition number (1-4): 2
First cylinder (34-1881, default 34 ):
Using default value 34
Last cylinder, + cylinders or + size {K, M, G} (34-1881, default 1881 ):
Using default value 1881

Command (m for help): t
Partition number (1-4): 2
Hex code (type L to list codes): 83

Command (m for help): p

Disk/dev/sdb: 15.5 GB, 15479597056 bytes
255 heads, 63 sectors/track, 1881 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: 0xcad4ebea

Device Boot Start End Blocks Id System
/Dev/sdb1 1 33 265041 B W95 FAT32
/Dev/sdb2 34 1881 14844060 83 Linux

Command (m for help):
Partition number (1-4): 1

Command (m for help): p

Disk/dev/sdb: 15.5 GB, 15479597056 bytes
255 heads, 63 sectors/track, 1881 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: 0xcad4ebea

Device Boot Start End Blocks Id System
/Dev/sdb1*1 33 265041 B W95 FAT32
/Dev/sdb2 34 1881 14844060 83 Linux

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

Calling ioctl () to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used
The next reboot or after you run partprobe (8) or kpartx (8)

WARNING: If you have created or modified any DOS 6.x
Partitions, please see the fdisk manual page for additional
Information.
Syncing disks.
[Root @ localhost ~] #

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