Exact Steps To Migrate ASM Diskgroups To Another SAN Without Downtime

  這篇文章的目的是實現asm磁碟組更換儲存的解決方法，這種方法不用停機。

Steps To Migrate ASM Diskgroups To Another SAN Without Downtime. [ID 837308.1]
		修改時間 15-JUN-2009     型別 HOWTO     狀態 PUBLISHED

 

In this Document
  
  

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Applies to:

Oracle Server - Enterprise Edition - Version: 10.1.0.2 to 11.1.0.7
Information in this document applies to any platform.

Goal

The present document explains in detail the exact steps to migrate ASM diskgroups from one SAN to another SAN without a downtime.

Solution

If your plans are replacing the current disks associated to your diskgroups with a new storage, this operation can be accomplished without any downtime, so you can follow the next steps

1) Backup all your databases and valid the backup (always required to protect your data).

2) Add the new path (new disks from the new storage) to your asm_disktring to be recognized by ASM:

Example:


3) Confirm that the new disks are being detected by ASM:



4) Add the new disks to your desired diskgroup:



5) Then wait until the rebalance operation completes:


6) Finally, remove the old disks:


7) Then wait until the rebalance operation completes:



8) Done, your ASM diskgroups and database have been migrated to the new storage.

Note: Alternatively, we can execute add disk & drop disk statements in one operation, in that way only one rebalance operation will be started as follow:


This is more efficient than separated commands (add disk & drop disk statements).