Issue

• Why it is not possible to add new partition in the OS after adding new hard drives in hardware raid5 using RaidManager?
• The system has IBM PCI ServeRAID, raid 5 has been configured and created 3 primary and 1 extended partitions with 3 more logical partitions.
• The extended partition is starting with cylinder 10753 and ending with 210019. The last logical partition has occupied remaining space from extended partition.

• When trying to create new partition, getting "No free sectors available" messages. But when using  "v" option with fdisk, it shows unallocated space.

  [root@localhost root]# fdisk /dev/sda
  
  The number of cylinders for this disk is set to 350032.
  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
  
  Command (m for help): v
  573493372 unallocated sectors
  

• Output of "fdisk -l" is as follows:

  [root@localhost root]# fdisk -l
  Disk /dev/sda: 734.0 GB, 734071357440 bytes
  128 heads, 32 sectors/track, 350032 cylinders
  Units = cylinders of 4096 * 512 = 2097152 bytes
  
  Device Boot    Start       End    Blocks   Id  System
  /dev/sda1   *         1       512   1048560   83  Linux
  /dev/sda2           513      8192  15728640   83  Linux
  /dev/sda3          8193     10752   5242880   83  Linux
  /dev/sda4         10753    210019 408098816    f  Win95 Ext'd (LBA)
  /dev/sda5         10753     12800   4194288   82  Linux swap
  /dev/sda6         12801     13707   1857520   83  Linux
  /dev/sda7         13708    210019 402046960   8e  Linux LVM