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[Solved] Creating unformatted partition


 
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Top Forums UNIX for Advanced & Expert Users [Solved] Creating unformatted partition
# 1  
Old 10-30-2011
[Solved] Creating unformatted partition

I needed to create a un-formatted partition of X MB on a disk dont want it from GUI but from command line not sure what should be specified for fdisk
# 2  
Old 10-30-2011
Please provide OS information first. Commands and options for fdisk utility varies from OS to OS. Here's what I would do on a RHEL system to create 30MB partition! Smilie

Code:
[root@testserv-sl6 ~]# fdisk /dev/sdb

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: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 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: 0x00092e03

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1         244     1953125   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sdb2             244         487     1952768   83  Linux
Partition 2 does not end on cylinder boundary.
/dev/sdb3             487         730     1952768   83  Linux
Partition 3 does not end on cylinder boundary.
/dev/sdb4             730        1045     2529280   83  Linux

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

Command (m for help): d
Partition number (1-4): 2

Command (m for help): d
Partition number (1-4): 3

Command (m for help): d
Selected partition 4

Command (m for help): p

Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 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: 0x00092e03

   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 (1-1044, default 1): 1
Last cylinder, +cylinders or +size{K,M,G} (1-1044, default 1044): +30M

Command (m for help): p

Disk /dev/sdb: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 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: 0x00092e03

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1           5       40131    5  Primary

Command (m for help): w

# 3  
Old 11-03-2011
Ok i forgot that fdisk only creates the partition as un-formatted then you have to use mke2fs to create partition.

In anyways can this automated I mean can all these options be specified via script i'm asking since its a interactive process.Would like to avoid expect script here.
# 4  
Old 11-03-2011
parted has a command line mode that can be scripted.
# 5  
Old 11-04-2011
Thanks parted just meets my requirements

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