Migrating data from a DS3200/DS3500 system

Use this procedure to use SAS connections to migrate data from a DS3200 or DS3500 system to a Lenovo Storage V series system.

The Lenovo Storage V3700 V2 XP system has two onboard 12 Gbps host attachment SAS ports. Lenovo Storage V3700 V2 XP systems can also support the optional SAS host interface adapter. Lenovo Storage V3700 V2 and Lenovo Storage V5030 systems support 12 Gbps SAS host attachment I/O but must have the optional host interface adapter installed.

Install and configure the system.

Verify the type and location of the SAS host attachment ports on each system.

Table 1 summarizes the number and type of SAS ports available on each system.

Table 1. Summary of system SAS ports
System	Type	Number
DS3200	Onboard	1
DS3500	Onboard	2
Lenovo Storage V3700 V2 and Lenovo Storage V3700 V2 XP	12 Gbps 4-port SAS host adapter (required)	4
Lenovo Storage V3700 V2 XP	Onboard	2
Lenovo Storage V3700 V2 XP	12 Gbps 4-port SAS host adapter (optional)	4

Ensure that you have the required number of SAS HD to mini SAS cables.
- Two cables for host attachment.
- One of the following:
  - Four cables for DS3500 attachment
  - Two cables for DS3200 attachment
Stop all host I/O operations.
Unmap the logical drives that contain the data from the hosts.

Hardware configuration

Unplug the SAS cables between the DS3200/DS3500 and the hosts.
Ensure that no SAS host ports on the DS3200/DS3500 system are occupied.
Connect the DS3200/DS3500 SAS host ports to the SAS host ports on each Lenovo Storage V series system, as shown in the following figures.
Note: 12 Gbps SAS cables have a square design rather than a rectangular design, which makes them easy to insert upside down. You can identify the correct orientation by observing the ridge at the top of the SAS connector and lining it up with the ridge on the node canister. However, this ridge is not enough to prevent the cable from being inserted incorrectly. Take extra care as the orientation of the SAS ports on a connector for a host interface adapter is the opposite of the onboard SAS ports.
Ensure that each DS3200/DS3500 controller is connected to both canisters of the Lenovo Storage V series system. These connections provide extra redundancy and ensure that the detected MDisks are not degraded. The wiring for the port connections varies for each Lenovo Storage V series system. Each figure shows the following features of each system:
- 1 SAS host/controller ports
- 2 SAS ports for host connectivity
Figure 1 shows the cabling between each DS3200 controller and each Lenovo Storage V3700 V2 XP controller. On the Lenovo Storage V3700 V2 XP system, the first SAS migration port (1) is used for this connection.
Figure 1. Connecting SAS cables from Lenovo Storage V3700 V2 XP to DS3200

Figure 2 shows the cabling between the SAS port on each DS3200 controller and each Lenovo Storage V3700 V2 controller. The 12 Gbps SAS host port adapter is installed on the Lenovo Storage V3700 V2 system. SAS port 1 is used for the connection.
Figure 2. Connecting SAS cables from Lenovo Storage V3700 V2 to DS3200

Figure 3 shows the cabling between the DS3200 system and the Lenovo Storage V5030 system. The 12 Gbps SAS host port adapter is installed on the Lenovo Storage V5030 system. SAS port 1 is used for the connection.
Figure 3. Connecting SAS cables from Lenovo Storage V5030 to DS3200

Figure 4 shows the cabling between a DS3500 controller and a Lenovo Storage V3700 V2 XP controller. The DS3500 system has two onboard SAS ports. Ensure that each SAS port on the DS3500 canister is connected to a SAS port on each Lenovo Storage V3700 V2 XP canister.On the Lenovo Storage V3700 V2 XP system, the cables are connected to onboard 12 Gbps SAS port 2 and port 3.
Figure 4. Connecting SAS cables from Lenovo Storage V3700 V2 XP to DS3500

Figure 4 shows the cabling between a DS3500 system and a Lenovo Storage V3700 V2 system. The 12 Gbps SAS host port adapter is installed on the Lenovo Storage V5030 system. SAS ports 1 and 2 are used for the connection.
Figure 5. Connecting SAS cables from Lenovo Storage V3700 V2 to DS3500

Figure 6 shows the cabling between a DS3500 system and a Lenovo Storage V5030 system. The 12 Gbps SAS host port adapter is installed on the Lenovo Storage V5030 system. SAS ports 1 and 2 are used for the connection.
Figure 6. Connecting SAS cables from Lenovo Storage V5030 to DS3500
Connect the remaining Lenovo Storage V series SAS host port to the host server SAS ports.

Software configuration

On the DS3200/DS3500 system, use the Storage Manager to define a new host by using the detected SAS WWPNs from the Lenovo Storage V series.
Set the Host type (operating system) to IBM TS SAN VCE.
To confirm the WWPNs of the SAS ports, enter the following command on the Lenovo Storage V series system.
```
svinfo lsportsas
```
On the DS3200/DS3500 system, use the Storage Manager to map a single logical drive to the newly created host as a logical unit.
Note: If you have more than one logical drive to migrate, you must add the disks one at a time to prevent confusion.
On the Lenovo Storage V series system, complete the following steps to manage the logical unit.
1. To create one empty storage pool, enter the following command.
```
svctask mkmdiskgrp -extextent_size
```
  The logical unit that was mapped from the DS3200/DS3500 system appears as an unmanaged-mode MDisk to the Lenovo Storage V series.
2. To list the unmanaged-mode MDisks, enter the following command.
```
svcinfo lsmdisk
```
3. If the new unmanaged-mode MDisk is not listed, perform a fabric-level discovery.
  Enter the following command to scan the network for the unmanaged-mode MDisks.
```
svctask detectmdisk
```
4. To convert the unmanaged-mode MDisk to an image mode volume disk, enter the following command.
```
svctask mkvdisk -vtype image -iogrpiogrp_name-mdiskgrp -mdiskmdiskgrp_namemdisk_name-mirrorwritepriority redundancy
```
  iogrp_name
  
  Name or ID of the I/O group.
  
  mdiskgrp_name
  
  Name or ID of the storage pool that you created in step 7.a.
  
  mdisk_name
  
  Name or ID of the unmanaged-mode MDisk.
5. To get the SAS WWPN of hosts that were previously using the data that the MDisk now contains, enter the following command.
```
svcinfo lssasportcandidate
```
6. To create SAS hosts, enter the following command, where sas_wwpn is the SAS WWPN of the host server.
```
svctask mkhost -saswwpnsas_wwpn
```
7. Map the new volume to the SAS hosts.
  Enter the following command to create a new mapping between a volume and a host. The image mode volume becomes accessible for I/O operations to the host.
```
svctask mkvdiskhostmap -hosthostname diskname
```
  hostname
  
  Name or ID of the SAS host that was created in step 7.f.
  
  diskname
  
  Name or ID of the virtual disk created in step 7.d.
On the host server, you can detect the new volume that is presented from the Lenovo Storage V series system and start I/O operations towards it.
If you have more than one logical drive to migrate, repeat steps 6 through 8.
On the Lenovo Storage V series system, complete the following steps to start migration for each image-mode volume.
1. To create one empty internal storage pool, enter the following command.
```
svctask mkmdiskgrp -ext extent_size
```
2. To create arrays with internal drives and add them to the internal storage pool, enter the following command.
```
svctask mkarray -levelraidtype-drivedrivelist mdiskgrpname
```
  raidtype
  
  Type of RAID array to be created.
  
  drivelist
  
  List of drive IDs.
  
  mdiskgrpname
  
  Name or ID of storage pool created in step 10.a.
3. After you determine the volume that you want to migrate and the new storage pool that you want to migrate it to, enter the following command.
```
svctask addvdiskcopy -mdiskgrpnewmdiskgrname vdiskname
```
  The copy ID of the new copy is returned. The copies now synchronize such that the data is stored in both storage pools.
4. To check the progress of the synchronization, enter the following command.
```
svcinfo lsvdisksyncprogress
```
5. After the volume reports that it is fully synchronized and you are ready to stop using the external storage system, enter the following command on the image-mode copy of the volume.
```
svctask rmvdiskcopy
```
  The image-mode copy is deleted, and its associated MDisk becomes unmanaged.

The data on DS3200/DS3500 logical drives is migrated to the Lenovo Storage V series system. Host I/O is also switched to the Lenovo Storage V series system.

You can now disconnect the SAS cabling between the DS3200/DS3500 system and the Lenovo Storage V series system.