Logical units and target ports on Hitachi HUS 100 family systems

The Hitachi HUS 100 family system has a maximum LUN size of 128 TB.

LUNs

A volume is referenced by the ID or the name of the H-LUN.

Each system in the Hitachi HUS 100 family can export 2048 - 4096 LUNs to the system node. The system supports greater than 2 TB LUNs.

LUN IDs

The Hitachi HUS 100 family systems identify exported logical units through SCSI identification descriptor type 3. The 64-bit NAA IEEE Registered Extended Identifier (NAA=5) for the logical unit is in the form 5-OUI-VSID. The HDS IEEE company ID is 000E8. The remaining part of the company ID is a vendor-specific ID.

 :~ # lsmdisk 2

id 2

name mdisk3

status online

mode managed

mdisk_grp_id 2

mdisk_grp_name HUS_grp

capacity 20.0GB

quorum_index 0

block_size 512

controller_name HUS_2B

ctrl_type 4

ctrl_WWNN 50060E80105D6039

controller_id 0

path_count 2

max_path_count 2

ctrl_LUN_# 0000000000000002

<HLUN>

UID 60060e80105d603005705e930000000300000000000000000000000000000000 

<HDS >< Serial No     ><Volume>

preferred_WWPN

active_WWPN 50060E80105D6033

fast_write_state empty

raid_status 

raid_level 

redundancy 

strip_size 

spare_goal 

spare_protection_min 

balanced 

tier generic_hdd

:~ #

Complete the required action on the volume: select Groups > Volumes.

LUN creation and deletion

Volumes and their corresponding logical units (H-LUNSs) are created, modified, or deleted through the browser. Volumes are formatted to all zeros upon creation.

Volumes are created in a RAID group or a dynamic provisioning (DP) pool. In the GUI, select Volumes > RAID Groups/DP Pools. From RAID Groups/DP Pools, select the required Pool/Group Number > Volumes. From here, you can select Create Volume.

Additionally, a host group can be created and assigned during this process. Partitions are exported as volumes with a logical unit number (H-LUN) either manually or automatically assigned to the partition. For the system, one LUN per RAID array is normal.

To modify, resize, or remove a LUN, follow these guidelines:

Unmap the volume: Select Groups > Host Groups and then select a port of the host group. Select edit host group:

Host Group Property
 choose; <name>
 select; Ports, to select all ports
 select; Forced set to all available ports
Second Tab; Volumes
 select, remove the volume and confirm

Complete the required action on the volume. Select Groups > Volumes. Select Volume Tab, select the volume, and then delete or change.

Note:

Make sure that the MDisk is unmanaged (removed from any storage pool) on the system before you delete the LUN on the Hitachi HUS 100 family SAN storage system.
Do not expand dynamic arrays on LUNs that are in use by the system. For the system to recognize arrays, the MDisk must first be made unmanaged by migrating or deleting the LUN from the storage pool.

LUN presentation

LUNs are exported through the available FC ports of the Hitachi HUS 100 family storage system. Configure these ports by host group.

Special LUNs

You do not need to follow special considerations for logical unit numbering. LUN 0 can be exported where necessary.

Target ports

A Hitachi HUS 100 family storage system has a total of eight Fibre Channel ports, as shown in the following example:

id controller_name ctrl_s/n             vendor_id            product_id_low       product_id_high 

0  HUS_2B          912503230001 2B      HITACHI              DF600F                               

1  HUS_1B          912503230001 1B      HITACHI              DF600F                               

2  controller0     912503230001 1A      HITACHI              DF600F                               

3  controller1     912503230001 1C      HITACHI              DF600F                               

4  controller2     912503230001 2A      HITACHI              DF600F                               

5  controller3     912503230001 1D      HITACHI              DF600F                               

6  controller4     912503230001 2C      HITACHI              DF600F                               

7  controller5     912503230001 2D      HITACHI              DF600F      

 lscontroller 0

id 0

controller_name HUS_2B

WWNN 50060E80105D6039

mdisk_link_count 19

max_mdisk_link_count 19

degraded no

vendor_id HITACHI  #

product_id_low DF600F  

product_id_high         

product_revision 0000

ctrl_s/n 912503230001 2B     

allow_quorum yes

WWPN 50060E80105D6039

path_count 6

max_path_count 18

evt110934:~ #

WWNN and WWPN in default settings appear identically. Hitachi HUS 100 family WWNNs appear as shown in the following example:

500060E8MMSSSSPP
50          -   NAA format 5, Vendor responsible for address
0060E8      -   ieee unique VSID of Hitachi Computer Products (America), inc.
MM          -   model range
SSSS        -   Hex for serial number
PP          -   Port Number

LU access model

All systems are Active/Active. To avoid an outage from system failure, cross connect the ports across Fibre Channel switches. Because all model Hitachi HUS 100 family storage systems are equal in priority, you gain no benefit by using an exclusive set for a specific LU.

LU grouping

LU grouping does not apply to Hitachi HUS 100 family systems.

LU preferred access port

No access ports are preferred on the model Hitachi HUS 100 family as all ports are Active/Active across all systems.

LUN security

LUN Security enables LUN masking by the worldwide node name (WWNN) of the initiator port. This function is supported for logical units (LUs) that are used by the system node.

Detecting Ownership

Detecting ownership does not apply to model Hitachi HUS 100 family storage arrays.