PRIMECLUSTER Global Disk Services Configuration and Administration Guide 4.1 (Solaris(TM) Operating System)

5.3.5 Disk Migration

This subsection describes the procedures for transferring volumes to other disks through use of GDS Snapshot proxy volumes. This method requires the following "Proxy Operations."

• Join

• Swap Slice

• Break

Proxy Volume Use Conditions
See the following sections for points of concern.

• "Exception to Proxy Configuration "

• "Number of Proxy Volumes"

• "Proxy Volume Size"

• "Proxy Group Size"

Join

Join a destination volume (a proxy volume) to a volume for disk migration (a master volume).

To perform disk migration on all the volumes within a group simultaneously, join a destination group (a proxy group) to a group for disk migration (a master group).

For "Join Proxy" procedures see "Join."

Swap Slice

Make sure that synchronization copying from the master to the proxy is complete in the Main screen and then swap slices comprising the master and slices comprising the proxy.

Follow the procedures below.

1. Selecting a destination proxy

   Click an icon of a master volume for disk migration on the GDS Configuration Tree in the Main screen.
   
   To perform disk migration on all the master volumes within a master group, click the master group icon.
   
   Select [View]:[Details]:[Proxy Object] to view all the proxy objects related to the master object selected on the GDS Configuration Tree, in the Object Information Field.
   
   In this field, click an icon of a destination proxy volume (or a proxy group).

   Possible Proxy Objects for Swapping
   "Swap Slices" is possible with proxy objects if they are joined and copy is complete.

   If There Is a Session by Disk Unit's Copy Function
   If there is a session by disk unit's copy function between the master and the proxy, slice swapping fails. For existing sessions, use the sdxinfo -S -e long command and check the FUNC field of the results. If the FUNC field for any slice of the master or the proxy shows a value other than the asterisk (*), a session exists between the master and the proxy. In this event, cancel the session with the sdxproxy Cancel command to swap the slices. For details, see "sdxinfo - Display object configuration and status information" and "sdxproxy - Proxy object operations."

   
   

2. Selecting the [Swap Slice] menu

   Select [Operation]:[Proxy Operation]:[Swap Slice] in the Main screen.

   [Figure: Swap Slice]

   

   
   

3. Confirming

   A confirmation screen appears asking you whether to swap the slices.

   [Figure: Confirming "Swap Slice"]

   

   
   

   To continue the process, click <Yes>. Clicking <No> cancels the slice swapping process.

   
   

4. Information message of the completion

   A message window appears informing you that the swap process is complete.

   [Figure: Information Message of "Swap Slice" Completion]

   

   
   

   Click <OK> to close the information message window.

   
   

Break

Break the relationship between the master and the proxy.

For "Break Proxy" procedures see "Breaking a Proxy."