Add External Volumes window

Use this window to display discovered external volumes and to make related selections.

Discovered External Volumes

Item	Description
LUN ID(Highest Priority)	External LUN with the highest priority. ?: Indicates that an external volume is not found. In this case, confirm the connection with the external system, and then perform the operation again.
Device Name	Name of the storage system reported to the host by the external volume. The displayed name differs by vendor. For some enterprise storage systems, emulation type is displayed.
Capacity	External volume capacity
Volume Properties	Identification number of the external volume. The value is used by UVM to identify the LUN across multiple paths. The value is provided by the external system and might reflect internal numbering.
Device ID	Identification number of the external volume
Drive Info	Information about the external volume's drive type: SATA: Drive type of external volumes is SATA. SSD,FMD: Drive type of external volumes is SSD or FMD. (For VSP 5000 series) SCM: Drive type of external volumes is SCM. SCM is displayed only when the SCM drive is mounted on a VSP 5000 series storage system. SSD, FMD is displayed, however, when the DKCMAIN program version is earlier than 90-04-04-00/00.
Path Mode	Operation mode of the external path: Single: Ordinarily, only one external path is used even if alternate paths are set. In Single mode, alternate paths are used only in case of maintenance work failure. Multi: When alternate paths are set, external paths from several ports are simultaneously used with load balancing.
ALUA Settable	Whether ALUA can be set as the Path Mode in the external storage system: Enable: Enables ALUA Mode. Disable: Disables ALUA Mode.
Discovery Result	Status of the result: Normal An error code
Initial Parity Group ID	An external volume group number and sequence number. Values range from 1 - 1 (default) to 16384 - 4096. The IDs are searched for in ascending order from the entered number, and then available IDs are assigned.
Data Direct Mapping	Whether to enable the Data Direct Mapping attribute: Enable: Enables the Data Direct Mapping attribute. Disable: Disables the Data Direct Mapping attribute (Default).
Allow Simultaneous Creation of LDEVs	Whether LDEVs in the external volume are created simultaneously: Yes: LDEVs are automatically created in the external volume. No: LDEVs must be created manually. By default, the value in the Edit Policies window is set. If Enable is specified for Data Direct Mapping, Yes is selected automatically.
Use External Storage System Configuration	Whether the external volume's configuration for the LDEVs is used: Yes: Configuration is used if Yes is specified in Allow Simultaneous Creation of LDEVs. No: Configuration is not used. LDEVs must be configured manually. By default, Yes is selected. If Enable is specified for Data Direct Mapping, Yes is selected automatically.
LDEV Name	LDEV name. Requires a prefix character and initial number, 32 characters maximum (including the initial number). The available numbers are assigned to the subsequent LDEV names in ascending order. Numbering rule for Initial Number: 1: Total of 9 numbers (1, 2, 3, ...9) 08: Total of 92 numbers (08, 09, 10, ...99) 23: Total of 77 numbers (23, 24, 25, ...99) 098: Total of 902 numbers (098, 099, 100, ...999)
Initial LDEV ID	Starting number from which, the storage system searches in ascending order. The next available LDEV ID is allocated to the external volume.
LDKC	LDKC number. 00 can be set for the value.
CU	CU number. Possible values for each model: VSP 5000 series: 00 to FE VSP E590: 00 to 7F VSP E790: 00 to BF VSP E990, VSP E1090: 00 to FE Default is 00.
DEV	LDEV identifier. Value between 00 and FF can be set. Default is 00.
Interval	Interval between the LDEV IDs. The specified interval will be kept and the LDEV ID will be set to each LDEV in external volume. From 0 (default) to 255.
View LDEV IDs	Used, available, and disabled LDEV IDs.
Initial SSID (VSP 5000 series)	SSID number. Range can be from 0004 (default) to FFFE. The IDs are searched for in ascending order from the entered number, and then available IDs are assigned.
View SSID (VSP 5000 series)	Current SSIDs. For information on the Edit SSIDs window, see the Provisioning Guide.
Base Emulation Type (VSP 5000 series)	External system's emulation type. All supported emulation types except OPEN-L can be specified. See External volume policy settings and functions for more information.
Number of LDEVs per External Volume	Maximum number of LDEVs to be created in the external volume when the volume is mapped. Depends on base emulation type and the capacity of the external volume. If Enable is specified for Data Direct Mapping, 1 is selected automatically.
Cache Partition	CLPR for accessing the external volume. The range can be from CLPR0 to CLPR31. The default is the value set in the Edit Policies window. See External volume policy settings and functions for more information.
Cache Mode	Enable: Write data from the host is propagated asynchronously. Disable: Write data from the host is propagated synchronously. (VSP 5000 series) Except the data written directly by the host, data (such as written by ShadowImage) will be propagated asynchronously regardless of the Cache Mode settings. The default is the value set in the Edit Policies window. See Cache use and external storage performance for more information.
Inflow Control	Enable: Write data is limited or prevented from being written to cache memory when the write operation cannot be performed. Disable: Write data is allowed to be written to cache when the write operation cannot be performed. See External volume policy settings and functions for more information.
Use ALUA as Path Mode	Whether ALUA is used as the Path Mode: Enable: ALUA mode is enabled. Default if ALUA mode can be set as the Path Mode. Disable: ALUA mode is disabled. Default if ALUA mode cannot be set as the Path Mode. (VSP 5000 series) If the product name of an external storage system is displayed as (generic), the selected external volume or volumes is used by default.
Load Balance Mode	I/O load balance system for external storage system: Depends on the selected external volume(s): If Enable is set for ALUA Settable on the external volume, Normal Round-robin is set for Load Balance Mode automatically. If Disable is set for ALUA Settable, Disable is set for Load Balance Mode automatically. Normal Round-robin: Load balance is performed in round-robin system. Extended Round-robin: Load balance system is automatically switched for sequential I/O and random I/O. Disable: I/O operation is performed with a single path, without load balance. The default is the value set in the Edit Policies window. If the product name of an external storage system is displayed as (generic), Depends on the selected external volume(s) is used by default. This item cannot be selected when the path mode of the external volume is Single or Disable is selected for Use ALUA as Path Mode.
MP Unit ID	MP unit ID for the external volume: MPU-10 or MPU-20 can be selected. Auto (default): The unit is automatically selected by the system. If Auto cannot be selected, the unit with lowest number is used.

Selected External Volumes

Item	Description
LUN ID(Highest Priority)	External volume's LUN with the highest priority
Device Name	Name of the storage system reported to the host by the external volume. The displayed name differs by vendor. For some enterprise storage systems, the emulation type is displayed.
Volume Properties	Identification number of the external volume. The value is used by UVM to identify the LUN across multiple paths. The value is provided by the external system and might reflect internal numbering.
Device ID	External volume's identification number
Drive Info	Information about the external volume's drive type: SATA: Drive type of external volumes is SATA. SSD,FMD: Drive type of external volumes is SSD or FMD. (For VSP 5000 series) SCM: Drive type of external volumes is SCM. SCM is displayed only when the SCM drive is mounted on a VSP 5000 series storage system. SSD, FMD is displayed, however, when the DKCMAIN program version is earlier than 90-04-04-00/00.
Parity Group ID	Parity group numbers
Base Emulation Type (VSP 5000 series)	External volume's emulation type
Top LDEV ID	External volume's top LDEV ID
Top LDEV Name	External volume's top LDEV name
Number of LDEVs	External volume's number of LDEVs
Capacity	External volume's capacity
SSID (VSP 5000 series)	SSIDs
CLPR	CLPR used for accessing to the mapped external volume
Cache Mode	Enable: Write data from the host is propagated asynchronously Disable: Write data from the host is propagated synchronously See Cache use and external storage performance for more information.
Inflow Control	Enable: Limits or prevents write data from being written to cache memory when the write operation cannot be performed. Disable: Allows write data to be written to cache when the write operation cannot be performed. See External volume policy settings and functions for more information.
Path Mode	Operation mode of the external path: Single: Ordinarily, only one external path is used even if alternate paths are set. In Single mode, alternate paths are used only in case of maintenance work failure. Multi: When alternate paths are set, external paths from several ports are simultaneously used with load balancing. ALUA: When alternate paths are set, external paths from several ports are simultaneously used with load balancing. External paths connected to ports in Passive status are not used.
ALUA Permitted	Whether ALUA can be set as the Path Mode in the local storage system: Enable: ALUA Mode is used. Disable: ALUA Mode is not used.
Load Balance Mode	I/O load balance system for external storage system: Normal Round-robin: Load balance is performed in round-robin system. Extended Round-robin: Load balance system is automatically switched for sequential I/O and random I/O. Disable: I/O operation is performed with a single path, without load balance.
MP Unit ID	ID of the MP unit of the external volume
Attribute	Attribute of the external volume
Edit SSIDs (VSP 5000 series) Not displayed by default. Displayed when you click More Actions.	When clicked, the Edit SSIDs window is displayed, and you can change the SSID of the selected external volume. For information on the Edit SSIDs window, see the Provisioning Guide.