and later [Release: NA and later ]
Sun Storage 6130 Array - Version: Not Applicable and later [Release: NA and later]
Sun Storage 6540 Array - Version: Not Applicable and later [Release: NA and later]
Sun Storage 6180 Array - Version: Not Applicable and later [Release: NA and later]
Sun Storage 6580 Array - Version: Not Applicable and later [Release: NA and later]
All Platforms
Goal
This document provides the steps necessary to perform Dynamic RAID Migration (DRM) for a given VDisk, using Common Array Manager (CAM) or the sscs CLI (Command Line).
The requirements for this are as follows:
- There can be only one VDisk in a Pool, if you are changing the level at the pool level.
- There can only a single volume in a VDisk, if you are changing the level at the volume level.
- Migrations to a RAID 1+0 require an even number of drives.
- The volume sizes remain unchanged, so a migration from a RAID 5+1 to 3+3 would
require that the volumes can be contained within the space of 3 drives of the
original 5+1 VDisk.
If these requirements are not met, you should expand your VDisk.
Solution
1) List out current profile for a given volume or pool.
Browser:
- Select Storage Systems.
- Expand Your Array Name.
- Click Volumes.
- Click on the Volume Link for your volume name.
- Note the Pool for this volume.
- Click Pools in the left menu panel.
- Click Pool Link for the name of the pool from step 5.
- Note the currently selected Profile for this pool.
- Click Profiles from the left menu panel.
- Click Profile Link for the name of the profile in step 8.
- Note all settings for:
- RAID Level.
- Segment Size.
- Read Ahead Cache setting.
- Number of drives.
- Drive type.
SSCS CLI:
- Get the profile name from the volume:
sscs list -a <array_name> volume
<volume_name> | grep Profile
- List profile details:
sscs list -a <array_name> profile
<profile_name>
- Note all settings for:
- RAID Level.
- Segment Size.
- Read Ahead Cache setting.
- Number of drives.
- Drive type.
2) Create a new profile with the desired transition RAID Level.
Browser:
- Select Storage Systems.
- Select Profiles.
- Click the New button.
- Define the profile like the current one for the volume, changing the
name and RAID Level.
- Click OK.
SSCS CLI:
- Create the new profile based on the following options for sscs:
sscs create -a <array_name> -r <raid_level>
-s <segment_size> -h <read_ahead> -n
<number_of_drive> -k <drive_type> profile
<profile_name>
Example:
sscs create -a myarray -r 1 -s 256K -h
off -n variable -k any profile new_RAID1_profile
3)
Create a new pool for this profile.
Browser:
- Select Storage Systems.
- Expand Your Array Name.
- Click Pools.
- Click New button.
- Fill in Pool name and select the profile that you created above.
SSCS CLI:
sscs create -a <array_name> -p
<profile_name> pool <new_pool_name>
Example:
sscs create -a myarray -p
new_RAID1_profile pool new_RAID1_pool
4)
Change the pool of the volume of the VDisk to the new pool.
For the volume:
Browser:
- Select Storage Systems.
- Expand Your Array Name.
- Click Volumes.
- Click on the Volume Link for your volume name.
- Change the Pool Drop-down to the new pool name.
- Click Save.
SSCS CLI:
sscs modify -a <array_name> -p
<new_pool_name> volume <volume_to_be_modified>
Example:
sscs modify -a myarray -p
new_RAID1_pool volume MyVol
For
the VDisk:
Browser:
- Select Storage Systems.
- Expand Your Array Name.
- Click VDisk.
- Click on the Vdisk Link for the vdisk of your set of volumes.
- Change the Pool Drop-down to the new pool name.
- Click Save.
SSCS CLI:
sscs modify -a <array_name> -p
<new_pool_name> vdisk <vdisk_to_be_modified>
Example:
sscs modify -a myarray -p
new_RAID1_pool vdisk 1
5) Review the job completion.
Browser:- Select Storage Systems.
- Expand Your
Array Name.
- Click Jobs.
SSCS CLI:
sscs list -a <array_name> jobs
Note: DRM, DVE (Dynamic Volume Expansion), DCE
(Dynamic Capacity Expansion) or DSS (Dynamic Segment Sizing) cannot be
run at the same time. Only one long running job can run on a volume or
VDisk at a given time.
6) Check the change.
Browser:
- Select
Storage Systems.
- Expand Your Array Name.
- Click
Volumes.
- Note the VDisk for your volume.
- Click
VDisks.
- Note the RAID Level of the VDisk.
SSCS
CLI:
- Get the VDisk number for the volume:
sscs list -a <array_name>
volume <volume_name> | grep "Virtual Disk"
Example:
sscs list -a
myarray volume MyVol | grep "Virtual Disk"
Virtual Disk: 4
- Get
the RAID Level of the VDisk:
sscs list -a <array_name> vdisk <vdisk_number> |
grep "RAID Level"
Example:
sscs list -a myarray vdisk 4 | grep "RAID
Level"
RAID Level 5
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