Cylinder issue

[Mike Burger]

You have reached the maximum number of primary partitions you can create
on your hard drive.  You are permitted 4 primary partitions, or 3 primary
and one extended, with the extended partition containing logical
partitions within.

You will not be able to create another partition residing between 15312
and 30543.

Your only option will likely be to back up, repartition, and restore.

And, IMO, if you're going to repartition, you're better off creating /boot
as a partition, and then using LVM to carve up the rest of the disk.

> Hi Have this layout
>
> Device Boot    Start       End    Blocks   Id  System
> /dev/sda1   *         1        13    104391   83  Linux
> /dev/sda2            14     12761 102398310   83  Linux
> */dev/sda3         12762     15312  20490907+  83  Linux
> /dev/sda4         30543     35642  40965750    f  Win95 Ext'd (LBA)*
> /dev/sda5         30543     33092  20482843+  83  Linux
> /dev/sda6         33093     35642  20482843+  83  Linux
> [root at ktwmbak2 1]#
>
> If you could see that /dev/sda3 is ended up with 15312 and /dev/sda4 has
> started with 30543
>
> If I wanted to create a new partition starting with cylinder of 15313 it
> is
> not allowing me
>
> [root at ktwmbak2 1]# fdisk /dev/sda
>
> The number of cylinders for this disk is set to 35642.
> 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): n
> No free sectors available
>
> My Disk is of Size 287GB
>
> and DF -h output is
>
> [root at ktwmbak2 root]# df -h
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sda3              20G   13G  5.9G  68% /
> /dev/sda1              99M   36M   58M  39% /boot
> /dev/sda2              97G   43G   50G  47% /opt/oracle
> /dev/sda6              20G   33M   19G   1% /opt/oracle/archlog
> /dev/sda5              20G  5.9G   13G  32% /opt/redprarie
> none                  4.0G     0  4.0G   0% /dev/shm
> [root at ktwmbak2 root]#
>
> Please suggest on this missing cylinders
>
> Thanks and Regards,
> Srinath
> [
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Mike Burger
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