The use of Fdisk partitioning commands in Linux is detailed

Under Linux, use FDISK to partition the hard disk: first delete the original partition, and then create a new partition

1) Delete partition

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[Root@standby root]# FDISK/DEV/SDC The number of cylinders for this disk is set to 4425. There is no wrong with then, but this is larger than 1024, And could in certain setups cause problems with: 1 software that runs in boot time (e.g., old versions of LILO) 2) booting and partitioning software from the other OSs (e.g., DOS fdisk, OS/2 fdisk) 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/sdc:36.4 GB, 36401479680 bytes 255 heads, Sectors/track, 4425 cylinders Units = Cylinders of 16065 * 8225280 bytes Device Boot Start End Blocks Id System /DEV/SDC1 1 2008093+ Linux /DEV/SDC2 251 2008125 Linux /DEV/SDC3 501 750 2008125 Linux /DEV/SDC4 751 4425 29519437+ 5 Extended /DEV/SDC5 751 1000 2008093+ Linux /DEV/SDC6 1001 4425 27511281 Linux Command (M for help): D Partition number (1-6): 1 Command (M for help): D Partition number (1-6): 2 Command (M for help): D Partition number (1-6): 3 Command (M for help): D Partition number (1-6): 4 Command (M for help): P disk/dev/sdc:36.4 GB, 36401479680 bytes 255 heads, Sectors/track, 4425 cylinders Units = Cylinders of 16065 * 8225280 bytes Device Boot Start End Blocks Id System Command (M for help): W The partition table has been altered! Calling IOCTL () to re-read partition table. Syncing disks.

2) Creating partitions

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[Root@standby root]# FDISK/DEV/SDC The number of cylinders for this disk is set to 4425. There is no wrong with then, but this is larger than 1024, And could in certain setups cause problems with: 1 software that runs in boot time (e.g., old versions of LILO) 2) booting and partitioning software from the other OSs (e.g., DOS fdisk, OS/2 fdisk) Command (M for help): P disk/dev/sdc:36.4 GB, 36401479680 bytes 255 heads, Sectors/track, 4425 cylinders Units = Cylinders of 16065 * 8225280 bytes 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 The cylinder (1-4425, default 1): Using Default value 1 Last cylinder or +size or +sizem or +sizek (1-4425, default 4425): +500 Command (M for help): N Command Action E Extended P primary partition (1-4) P Partition number (1-4): 2 The cylinder (502-4425, default 502): Using Default Value 502 Last cylinder or +size or +sizem or +sizek (502-4425, default 4425): +2048m Command (M for help): N Command Action E Extended P primary partition (1-4) P Partition number (1-4): 3 The cylinder (752-4425, default 752): Using Default Value 752 Last cylinder or +size or +sizem or +sizek (752-4425, default 4425): +2048000k Command (M for help): N Command Action E Extended P primary partition (1-4) P Selected Partition 4 The cylinder (1002-4425, default 1002): Using Default Value 1002 Last cylinder or +size or +sizem or +sizek (1002-4425, default 4425): +2048m Command (M for help): N Must delete some partition and add an extended partition Command (M for help): D Partition number (1-4): 4 Command (M for help): N Command Action E Extended P primary partition (1-4) E Selected Partition 4 The cylinder (1002-4425, default 1002): Using Default Value 1002 Last cylinder or +size or +sizem or +sizek (1002-4425, default 4425): Using Default Value 4425 Command (M for help): N The cylinder (1002-4425, default 1002): Using Default Value 1002 Last cylinder or +size or +sizem or +sizek (1002-4425, default 4425): +2048m Command (M for help): N The cylinder (1252-4425, default 1252): Using Default Value 1252 Last cylinder or +size or +sizem or +sizek (1252-4425, default 4425): +2048m Command (M for help): N The cylinder (1502-4425, default 1502): Using Default Value 1502 Last cylinder or +size or +sizem or +sizek (1502-4425, default 4425): Using Default Value 4425 Command (M for help): N No Free sectors Available Command (M for help): P disk/dev/sdc:36.4 GB, 36401479680 bytes 255 heads, Sectors/track, 4425 cylinders Units = Cylinders of 16065 * 8225280 bytes Device Boot Start End Blocks Id System /DEV/SDC1 1 501 4024251 Linux /DEV/SDC2 502 751 2008125 Linux /DEV/SDC3 752 1001 2008125 Linux /DEV/SDC4 1002 4425 27503280 5 Extended /DEV/SDC5 1002 1251 2008093+ Linux /DEV/SDC6 1252 1501 2008093+ Linux /dev/sdc7 1502 4425 23486998+ Linux Command (M for help): W The partition table has been altered! Calling IOCTL () to re-read partition table. Syncing disks.

There are two ways to build a partition: Using a file system, using a bare device

1 Use File system

Creating a file system

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[Root@standby root]# Mkdir/test [Root@standby root]# MKFS/DEV/SDC3 MKE2FS 1.32 (09-nov-2002) FileSystem label= OS Type:linux Block size=4096 (log=2) Fragment size=4096 (log=2) 251392 inodes, 502031 blocks 25101 blocks (5.00%) reserved for the Super user The Data block=0 Block groups 32768 blocks per group, 32768 fragments per group 15712 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912 Writing Inode Tables:done Writing superblocks and filesystem accounting Information:done This filesystem would be automatically checked every mounts or 180 days, whichever comes. Use Tune2fs-c or-i to override.

Hook up file system

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[Root@standby root]# Mount/dev/sdc3/test

Change permissions

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[Root@standby root]# Ls-ltr/test Total 16 Drwx--2 root root 16384 June 21:51 Lost+found [Root@standby root]# chown-r oracle.dba/test [Root@standby root]# chmod 755/test [Root@standby root]# Ls-ltr/test Total 16 Drwx--2 Oracle DBA 16384 June 21:51 Lost+found

Create a table space

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sql> Create Tablespace Chen 2 datafile '/test/chen.dbf ' size 10M; Tablespace created.

Add a data file to a table space

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Sql> Alter Tablespace Chen 2 Add datafile '/test/chen2.dbf ' size 10M; Tablespace altered.

You can see that the table space Chen's size is 20m.

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Sql> Select T.tablespace_name, round (SUM (bytes/(1024*1024)), 0) ts_size 2 from Dba_tablespaces T, Dba_data_files D 3 Where t.tablespace_name = D.tablespace_name 4 GROUP by T.tablespace_name; Tablespace_name ts_size ———————————————————— ———- CHEN 20 Eygle 10 SYSTEM 250 UNDOTBS1 200 USERS 25

2 Use bare equipment

You can see existing bindings

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[Root@standby root]# Raw-qa /dev/raw/raw1:bound to Major 8, minor 17 /dev/raw/raw2:bound to Major 8, minor 18 /dev/raw/raw3:bound to Major 8, minor 19 /dev/raw/raw4:bound to Major 8, minor 20 /dev/raw/raw5:bound to Major 8, minor 34

Bind Raw Device

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[Root@standby test]# RAW/DEV/RAW/RAW6/DEV/SDC1 /dev/raw/raw6:bound to Major 8, minor 33 Ditional Information:1

Change permissions

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[Root@standby root]# chown-r Oracle.dba/dev/raw [Root@standby root]# chmod 755/dev/raw

Create a table space

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sql> Create Tablespace Jin 2 datafile '/dev/raw/raw6′size 10M; Tablespace created

directive: Fdisk

Purpose: To observe the physical use of the hard disk and split the hard disk.

How to use:

First, in the console input fdisk-l/DEV/SDA, observe the hard disk of the entity use case.

Second, enter the FDISK/DEV/SDA on the console, you can enter the split hard disk mode.

1. Input m shows all commands listed.

2. The input P shows the hard disk partition situation.

3. Enter a to set the hard drive boot area.

4. Enter N to set a new hard disk partition.

4.1. Enter e hard disk as [extended] partition area (extend).

4.2. Enter P hard disk as [main] partition area (primary).

5. The input t changes the hard disk partition property.

6. Enter D to delete the hard drive partition properties.

7. Enter Q End not in the hard drive partition property.

8. Enter W end and write hard disk partition properties