Setting up the mirrored volume set

After you have installed the mirrored disk hardware and software, you need to set up the mirrored volume set by performing the following procedures:

Initialize the mirrored volume set.
Add members to the mirrored volume set, if necessary.
Move files, if necessary.
Set up accounts and groups.

Initializing a mirrored volume set

A mirrored volume set is created by using the VOLUTIL NEWMIRRSET command to initialize the master volume of the set. Refer to the Volume Management Reference Manual (32650-90045) for more information on using the VOLUTIL utility.

This example shows how to create a mirrored volume set. You need create volumes (CV) capability to create a mirrored set.

Use the DSTAT command to display which disks can be initialized.




	NOTE: The new volume must be mounted in the `SCRATCH` or `UNKNOWN` state.

   :DSTAT



   LDEV-TYPE  STATUS   VOLUME  (VOLUME SET - GEN) 

    _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

   30- 079370  SCRATCH

   31- 079370  SCRATCH

   32- 079370  SCRATCH

   33- 079370  SCRATCH

LDEVs 30, 31, 32, and 33 are mounted in the SCRATCH state and are available to be initialized.

Start the VOLUTIL utility.

Use the NEWMIRRSET command to initialize the mirrored volume set PROD_SET with the master name MEMBER1 for LDEVs 30 and 31.

   :VOLUTIL



   Mirvutil A.00.00, (C) Hewlett-Packard Co., 1989. All Rights Reserved.



   volutil: NEWMIRRSET PROD_SET MEMBER1 (30,31)



   *Verify: Initialize new volume set PROD_SET on ldev 30 and ldev 31 [Y/N]? Y



   *Note: New master volume has been initialized for ldev 30 and ldev 31.

The header "Mirvutil" tells you that mirrored disk software has been installed and that VOLUTIL has been changed to accommodate mirrored disks.

The system responds with a question asking you to verify whether the information that you input was correct. When you respond Y followed by RETURN, the system displays process information.




	CAUTION: Make sure that you see the message verifying that the volumes were initialized. Any error that occurs during initialization means that the volumes must be reinitialized.

After you create a mirrored volume set, use the DSTAT command to verify that the volume set was initialized.

   volutil: :DSTAT



   LDEV-TYPE  STATUS   VOLUME  (VOLUME SET - GEN) 

   _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

   30- 079370  MASTER-MD   MEMBER1 (PROD_SET-0)

   31- 079370  MASTER-MD   MEMBER1 (PROD_SET-0)

   32- 079370  SCRATCH

   33- 079370  SCRATCH

The "MD" in the previous screen designates a mirrored disk volume.

Adding volumes to a mirrored set

To add a volume to a mirrored volume set, use the VOLUTIL NEWMIRRVOL command.




	NOTE: The new volume must be mounted in the `SCRATCH` or `UNKNOWN` state.

This example shows how to add a volume to a mirrored volume set.

Use the NEWMIRRVOL command to add the volume MEMBER2 to the mirrored volume set PROD_SET for LDEVs 32 and 33. If you do not specify a volume class, the default volume class DISC is added to the volume.
NOTE: Remember to include the colon (:) in the command between the set name and the volume name.
volutil: NEWMIRRVOL PROD_SET:MEMBER2 (32,33) *Verify: Initialize new member volume on ldev 32 and ldev 33 [Y/N]?Y *Note: New member volume has been initialized for ldev 32 and ldev 33.
The system responds with a question asking you to verify whether the information you input was correct. When you respond Y followed by RETURN, the system displays process information.
CAUTION: Make sure that you see the message verifying that the volumes were initialized. Any error that occurs during initialization means that the volumes must be reinitialized.

Use the DSTAT command to verify that the volumes were added correctly to the volume set.

   volutil: :DSTAT



   LDEV-TYPE  STATUS      VOLUME  (VOLUME SET - GEN) 

   _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

   30- 079370  MASTER-MD   MEMBER1 (PROD_SET-0)

   31- 079370  MASTER-MD   MEMBER1 (PROD_SET-0)

   32- 079370  MEMBER-MD   MEMBER2 (PROD_SET-0)

   33- 079370  MEMBER-MD   MEMBER2 (PROD_SET-0)

Use the VOLUTIL SHOWSET command with the new MIRROR option to display and verify volume information.

   volutil:SHOWSET PROD_SET MIRROR



   Volume Name  Vol Status  Mirr Status  Ldev  Mirr ldev

   - - - - - - - - - - - -  - - - - - -  - - - - - - - - 

   MEMBER1      MASTER      NORMAL       30    31   

   MEMBER1      MASTER      NORMAL       31    30   

   MEMBER2      MEMBER      NORMAL       32    33   

   MEMBER2      MEMBER      NORMAL       33    32

This screen shows that there are four mirrored disks operating normally.

Additional pairs can be added to the mirrored volume set using the NEWMIRRVOL command.

Setting up accounts and groups

Once the mirrored volume set has been created, set up accounts and groups on the system volume set and the mirrored volume set. For more information on setting up accounts and groups on nonsystem volume sets, refer to the Volume Management Reference Manual (32650-90045).

The BULDACCT utility can be used to set up accounts and groups. Information on using this utility is described in the MPE/iX Utilities Manual (32650-90081).

Moving files

Now that the mirrored volume set has been created and contains accounts and groups, you can move files to that set. Since the system volume set cannot be mirrored, data on the system volume set that is to be mirrored must be moved to a mirrored volume set. Use the STORE command to move files from the system volume set to the mirrored volume set. Refer to the MPE/iX Commands Reference Manual Volumes 1 and 2 (32650-90003 and 32650-90364) for more information on moving files.

Setting up the mirrored volume set

Technical documentation

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Initializing a mirrored volume set

Adding volumes to a mirrored set

Setting up accounts and groups

Moving files