G.3.1.1 Partitioning for Oracle Linux 6

To partition a logical drive for Oracle Linux 6:

1. Complete the steps in "Replacing a Disk Drive".
2. Confirm that the new disk does not have a partition table:

   # parted /dev/disk/by-hba-slot/sn -s print
   

   You should see a message about a missing partition table.

3. If the parted command displays a partition table, then clear it:

   # dd if=/dev/zero of=/dev/disk/by-hba-slot/sn bs=1M count=100
   

   Tip:

   You can use this command to restart an operating system disk configuration, if you make a mistake.

4. Create the partition table:

   # parted /dev/disk/by-hba-slot/sn -s mklabel gpt print
   

5. List the Cylinder, Head, Sector (CHS) partition information of the surviving disk. Thus, if you are partitioning /dev/disk/by-hba-slot/s0, then enter /dev/disk/by-hba-slot/s1 for /dev/disk/by-hba-slot/sm in the following command:

   # parted /dev/disk/by-hba-slot/sm -s unit chs print
    
   Model: LSI MR9261-8i (scsi)
   Disk /dev/sda: 243031,30,6
   Sector size (logical/physical): 512B/512B
   BIOS cylinder,head,sector geometry: 243031,255,63.  Each cylinder is 8225kB.
   Partition Table: gpt
    
   Number  Start        End          File system    Name    Flags
    1      0,0,34       25,127,7     ext4           primary boot
    2      25,127,8     21697,116,20                primary raid
    3      21697,116,21 23227,61,35  linux-swap(v1) primary
    4      23227,61,36  243031,29,36 ext4           primary
   

6. Create partitions 1 to 3 on the new drive by duplicating the partitions of the surviving disk. Issue three commands in this format:

   # parted /dev/disk/by-hba-slot/sn -s mkpart primary file_system start end
   

   Use the start and end addresses that you obtained in Step 5 instead of the addresses shown in the following example:

   # parted /dev/disk/by-hba-slot/sn -s mkpart primary ext4 0,0,34 25,127,7
   # parted /dev/disk/by-hba-slot/sn -s mkpart primary ext4 25,127,8 21697,116,20
   # parted /dev/disk/by-hba-slot/sn -s mkpart primary linux-swap 21697,116,21 23227,61,35
   

7. Create primary partition 4 using the start address obtained in Step 5 and an end address of 100%:

   # parted /dev/disk/by-hba-slot/sn -s mkpart primary ext4 23227,61,36 100%
   

   Partition 4 stores HDFS data, and this syntax makes the partition as large as possible.

8. Set the RAID flags:

   # parted -s /dev/disk/by-hba-slot/sn set 1 raid
   # parted -s /dev/disk/by-hba-slot/sn set 2 raid
   

9. Set the boot flag:

   # parted -s /dev/disk/by-hba-slot/sn set 1 boot

10. Verify that the boot flag is set:

    # parted /dev/disk/by-hba-slot/sn -s unit chs print

    An example of the output is as follows:

    Model: LSI MR9261-8i (scsi)
    Disk /dev/sda: 243031,30,6
    Sector size (logical/physical): 512B/512B
    BIOS cylinder,head,sector geometry: 243031,255,63. Each cylinder is 8225kB.
    Partition Table: gpt
    Number Start         End           File system    Name    Flags 
    1      0,32,32       24,89,0       ext4           primary boot 
    2      24,89,1       60812,135,58                 primary raid 
    3      60812,135,59  65618,90,7    linux-swap(v1) primary 
    4      65618,90,8    243030,252,37 ext4           primary

11. Complete the steps in "Repairing the RAID Arrays".