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Chapter 8

Modifying and Adding Disk Partitions

This chapter describes how to examine or modify the configuration of a disk partition on the master-eligible nodes. Master-eligible nodes can have more than one disk. The disk partitions discussed in this chapter pertain to the disk that contains the cluster configuration. For more information about disk partitioning, see "Volume Management" in the Netra High Availability Suite Foundation Services 2.1 6/03 Overview.

The disk on a dataless node is not used to store cluster data and is not discussed in this chapter. For information about the initial disk configuration of a dataless node, see the Netra High Availability Suite Foundation Services 2.1 6/03 Custom Installation Guide.

This chapter contains the following sections:

Using the format Utility to Display and Modify the Configuration of a Disk Partition

This section describes how to use the format utility to display and modify the configuration of a disk partition. For additional information, see the format(1M) man page.

Before you change the configuration of a disk partition, you must stop all the nodes in the cluster. If you change the size of a data partition on one master-eligible node, you must change the size of the corresponding bitmap partition on that disk. You must also change the size of the corresponding data partition and bitmap partition on the other master-eligible node.

ProcedureTo Display the Configuration of a Disk Partition

Use this procedure to identify the name of each partition on a disk and to determine whether a disk partition is big enough.

  1. Log in to a master-eligible node as superuser.

  2. Run the format utility:

    # format

    Output similar to this is displayed in the console window:

    Searching for disks...done
    
    
    AVAILABLE DISK SELECTIONS:
           0. c0t0d0 <SUN36G cyl 24620 alt 2 hd 27 sec 107>
              /pci@1f,0/pci@1,1/scsi@2/sd@0,0
    Specify disk (enter its number):

  3. Choose the disk you want to examine:

    Specify disk (enter its number): 0

    Output similar to this is displayed in the console window:

    selecting c0t0d0
    [disk formatted]
    Warning: Current Disk has mounted partitions.
    
    
    FORMAT MENU:
            disk       - select a disk
            type       - select (define) a disk type
            partition  - select (define) a partition table
            current    - describe the current disk
            format     - format and analyze the disk
            repair     - repair a defective sector
            label      - write label to the disk
            analyze    - surface analysis
            defect     - defect list management
            backup     - search for backup labels
            verify     - read and display labels
            save       - save new disk/partition definitions
            inquiry    - show vendor, product and revision
            volname    - set 8-character volume name
            !<cmd>     - execute <cmd>, then return
            quit

  4. Choose the partition option:

    format> partition

    Output similar to this is displayed in the console window:

    PARTITION MENU:
            0      - change `0' partition
            1      - change `1' partition
            2      - change `2' partition
            3      - change `3' partition
            4      - change `4' partition
            5      - change `5' partition
            6      - change `6' partition
            7      - change `7' partition
            select - select a predefined table
            modify - modify a predefined partition table
            name   - name the current table
            print  - display the current table
            label  - write partition map and label to the disk
            !<cmd> - execute <cmd>, then return
            quit

  5. Display the configuration of the current disk partitions:

    partition> print

    Output similar to this is displayed in the console window:

    Current partition table (original):
    Total disk cylinders available: 24620 + 2 (reserved cylinders)
    
    Part      Tag    Flag     Cylinders         Size            Blocks
      0       root    wm       0 -  1451        2.00GB    (1452/0/0)   4194828
      1       swap    wu    1452 -  2177        1.00GB    (726/0/0)    2097414
      2     backup    wm       0 - 24619       33.92GB    (24620/0/0) 71127180
      3 unassigned    wm    2178 -  3629        2.00GB    (1452/0/0)   4194828
      4 unassigned    wm    3630 -  3771      200.31MB    (142/0/0)     410238
      5 unassigned    wm    3772 -  3772        1.41MB    (1/0/0)         2889
      6 unassigned    wm    3773 -  3773        1.41MB    (1/0/0)         2889
      7 unassigned    wm       0                0         (0/0/0)            0

  6. Quit if you do not want to modify the size of a partition:

    partition> quit

    This output is displayed in the console window:

    FORMAT MENU:
            disk       - select a disk
            type       - select (define) a disk type
            partition  - select (define) a partition table
            current    - describe the current disk
            format     - format and analyze the disk
            repair     - repair a defective sector
            label      - write label to the disk
            analyze    - surface analysis
            defect     - defect list management
            backup     - search for backup labels
            verify     - read and display labels
            save       - save new disk/partition definitions
            inquiry    - show vendor, product and revision
            volname    - set 8-character volume name
            !<cmd>     - execute <cmd>, then return
            quit

    format> quit

    You return to the console prompt, #.

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