Storage Migration

Overview
User Privileges
Display Contents

Overview

This function displays the setting and progress of Storage Migration.

Storage Migration is the function for migrating data by connecting other storage systems (migration source) and the storage system (migration destination). Data migration is possible regardless of the server and the OS, and without using server resources.

Caution

When performing a Storage Migration, confirm that there is no access from the host to the migration source volume.
The requirements for access from the host to the destination volume vary depending on the operation mode.
- For "Migration & Host IO", Storage Migration can be performed even if host access exists in the destination volume after a migration is started.
- For "Migration", "Migration + Quick Compare", or "Quick Compare", perform a Storage Migration without access from the host to the destination volume.
- For "Migration + Full Compare" or "Full Compare", perform a Storage Migration without access from the host to any volume in the destination storage system.
The path groups must be deleted after the data migration is complete. If the operation mode is "Migration & Host IO", host I/O response is reduced until the path groups are deleted. In addition, if the migration path is blocked, the host I/O may stop.
Do not perform the following operations when there are Storage Migration paths ("path group" hereafter) established.
- Configuration of an Advanced Copy destination to the destination volume
- Configuration of an Advanced Copy destination to the migration source volume
- Formatting of the destination volume
- RAID diagnosis in the RAID group to which the destination volume belongs
- Disk diagnosis of the disk drives in the RAID group to which the destination volume belongs
- CM hot expansion on the destination storage system
- Memory hot expansion on the destination storage system
The path groups must be deleted after the data migration is complete. The following operations are not available before path groups are deleted:
- Hot controller firmware upgrade at the destination storage system
- Eco-mode schedule setting of the RAID group to which the destination volume belongs
- Eco-mode schedule setting of the Thin Provisioning Pool (TPP) to which the destination volume belongs
- Capacity expansion of the RAID group to which the destination volume belongs
- RAID migration of the destination volume
- Encryption of the destination volume
- Capacity expansion of the destination volume
- Deletion of the destination volume
- Port mode modification of the destination FC-Initiator port
- Port parameter setting of the destination FC-Initiator port
- Reduction of the CA to which the destination FC-Initiator port belongs

Note

Click the [] icon to display the latest screen.
Use the [Start Storage Migration] function to start Storage Migration.
A started Storage Migration can be suspended, stopped, and restarted in volume units on the [Path Group Detail Information] screen. Refer to the [Suspend Storage Migration] function, the [Stop Storage Migration] function, or the [Restart Storage Migration] function for details.

User Privileges

Availability of Executions in the Default Role

Default role	Availability of executions
Monitor
Admin
StorageAdmin
AccountAdmin
SecurityAdmin
Maintainer

Refer to "User Roles and Policies" for details on the policies and roles.

Display Contents

A list of Storage Migration instances that have paths are displayed.

Item	Description
Path Group	The path group number (0 to 15) is displayed in decimal number. Click this item to display the [Path Group Detail Information] Screen. A path group combines the paths for data migration into a group for each source storage system. The paths from a single source storage system to the local (destination) storage system constitute a path group.
Vendor ID	The manufacturer name of the source storage system to which the path is created is displayed. An inconvertible code is displayed as "*".
Product ID	The product name of the source storage system to which the path is created is displayed. An inconvertible code is displayed as "*".
Serial number	The serial number of the source storage system to which the path is established is displayed. An inconvertible code is displayed as "*".
Progress	The progress (%) of Storage Migration for the path group is displayed.
Status	The general status of Storage Migration for the path group is displayed. Complete All Storage Migration operations have completed normally. Error There are one or more LUNs that do not exist in the migration source volume, or there are one or more volumes for which Storage Migration failed due to error. Stop Storage Migration has been stopped or suspended for one or more volumes (all other volumes have completed Storage Migration normally), or Storage Migration of all the volumes has been stopped or suspended. Normal Other than above.

[Path Group Detail Information] Screen

Storage Migration Path Information

In this screen, information of the selected path group is displayed.

Item

Description

Path Group

The path group number (0 to 15) is displayed.

Vendor ID

The manufacturer name of the source storage system to which the path is created is displayed.

An inconvertible code is displayed as "*".

Product ID

The product name of the source storage system to which the path is created is displayed.

An inconvertible code is displayed as "*".

Serial number

The serial number of the source storage system to which the path is established is displayed.

An inconvertible code is displayed as "*".

Operation Mode

The operation mode for the path group is displayed.

If the operation mode setting has been omitted, "Migration" is displayed.

Migration

Data migration from the source storage system to the destination storage system is performed.
Migration + Quick Compare

Data migration from the source storage system to the destination storage system and a data comparison of source LUNs and destination volumes are performed. "Quick Compare" compares data in a part of the volume area. "Migration + Quick Compare" consecutively executes "data migration" and "data comparison" for each volume.
Migration + Full Compare

Data migration from the source storage system to the destination storage system and a data comparison of source LUNs and destination volumes are performed. "Full Compare" compares data in entire volume area. "Migration + Full Compare" consecutively executes "data migration" and "data comparison" for each volume.
Quick Compare

A data comparison of source LUNs and destination volumes is performed. "Quick Compare" compares data in a part of the volume area.
Full Compare

A data comparison of source LUNs and destination volumes is performed. "Full Compare" compares data in entire volume area.
Migration & Host IO

Data migration from the source storage system to the destination storage system is performed. Stop the operation only when switching the host connection to the destination storage system. This enables continued access from the host to the destination volume during the data migration.

Status

The general status of Storage Migration for the path group is displayed.

Complete

All Storage Migration operations have completed normally.
Error

There are one or more LUNs that do not exist in the migration source volume, or there are one or more volumes for which Storage Migration failed due to error (displayed in red characters).
Stop

Storage Migration has been stopped or suspended for one or more volumes (all other volumes have completed Storage Migration normally), or Storage Migration of all the volumes has been stopped or suspended.
Normal

Other than above.

The status display priority order is "Error" > "Normal" > "Stop" > "Complete".

The following table shows the relationship between the general status of Storage Migration and the volume status.

Storage Migration general status	Volume status ("Migration Status" in the Storage Migration Volume List)
Complete	Migration status is "Normal End" for all paths.
Error	Some source LUNs are in "Not Exist" state, or some paths have migration status of "Error".
Stop	The migration status of one or more volumes is "Stop" or "Suspend" (all other migration statuses are "Normal End"), or the migration status of all the volumes is "Stop" or "Suspend".
Normal	Other than above.

Progress

The progress (%) of Storage Migration for the path group is displayed.

Migration Connection Path

In this screen, information of the migration connection paths are displayed.

Item	Description
Source WWN	The WWN for the source FC-CA port is displayed.
CA Port	The location information of the destination FC-Initiator is displayed. For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4 CE#x CM#y CA#z Port#w For the other models CM#y CA#z Port#w x: CE number y: CM number z: CA number w: Port number

Item

Description

Source WWN

The WWN for the source FC-CA port is displayed.

CA Port

The location information of the destination FC-Initiator is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

Storage Migration Volume List

In this screen, the list of migration volumes of Storage Migration is displayed. This list shows the migration status, progress, start time, and end time for each migration volume.

Item

Description

Source LUN

The source LUN is displayed in decimal number.

Source LUNs are displayed with decimal numbers if the source LUNs are specified with decimal numbers when Storage Migration setting files are created. Source LUNs are also displayed with decimal numbers if the source LUNs satisfy the conditions for being specified with decimal numbers. If the source LUNs do not satisfy the conditions for being specified with decimal numbers, a "-" (hyphen) is displayed. Refer to the [Download Template File for Storage Migration Settings] function for details.

Source LUN (Hex)

The source LUN is displayed in hexadecimal number (16-digit or 4-digit).

Source LUN Status

The source LUN status is displayed.

Available: The source LUN can be used

Not Available: The source LUN cannot be used

Not Exist: The source LUN does not exist

Destination Volume No.

The destination volume number is displayed in decimal number.

Destination Volume No. (Hex)

The destination volume number is displayed in hexadecimal number.

"0x" (2-digit) + Capital letters and numeric characters (4-digit)

Destination Volume Name

The destination volume name is displayed.

Capacity

The destination volume capacity [TB/GB/MB] is displayed.

Migration Status

The data migration status is displayed.

Initial: initial state

Waiting: awaiting migration

Running: migrating

Normal End: normally completed

Suspend: in suspension

Stop: stopped

Error (xxx): (xxx) indicates the error factor.

"-" (hyphen): does not exist in the source LUN (the LUN status is "Not Exist").

Caution

If "Waiting" is displayed, the data migration does not start automatically. Restart the data migration manually.

Progress

The data transfer progress (%) is displayed.

Start Time

The start and end times of data migration are displayed.

The start and end times (YYYY-MM-DD hh:mm:ss) are displayed as shown below depending on the migration status.

Migration status	Start time	End time
Initial	Blank	Blank
Waiting	Blank	Blank
Running	The migration start time is displayed.	Blank
Normal End	The migration start time is displayed.	The migration end time is displayed.
Suspend	The migration start time is displayed.	The time when migration suspends is displayed.
Stop	The migration start time is displayed.	The time when migration stops is displayed.
Error (xxx)	The migration start time is displayed.	The time when migration stops due to an error is displayed.

Caution

When Storage Migration is restarted when its migration status is "Suspend" or "Error", data migration restarts from the point of suspension. In this case, the start time is not changed.
When Storage Migration is restarted when its migration status is "Stop", data migration of the LUN is started over from scratch. The start time is changed to the migration restart time.

End Time

Error Location

The storage system in which a data migration error occurs is displayed.

If no error occurs, a "-" (hyphen) is displayed.

Source: Migration source storage system

Destination: Local (migration destination) storage system