Logical units and target ports on HP P2000 G3 systems

The HP P2000 G3 system has a maximum LUN size of 60 TB.

LUNs

A volume is referenced by the volume name.

HP P2000 G3 can export 512 LUNs to the system (limit). The system supports greater than 2 TB LUNs.

The HP P2000 G3 array or volume can be partitioned as volumes. A one-to-one disk-to-volume size is normally used for presentation to the system.

LUN IDs

The HP P2000 G3 systems identify exported logical units through SCSI identification descriptor type 3. The 64-bit NAA IEEE Registered Extended Identifier (NAA=6) for the logical unit is in the form 6-OUI-VSID. The HP P2000 G3 IEEE company ID is 00C0FF (Dot Hill). The remaining part of the company ID is a vendor-specific ID.

Example of HP P2000 G3 svc mdisk output:

# lsmdisk 36
id 36
name mdisk36
status online
mode managed
mdisk_grp_id 7
mdisk_grp_name P2000-grp
capacity 156.5GB
quorum_index 0
block_size 512
controller_name hp-P2000-g3
ctrl_type 4
ctrl_WWNN 208000C0FF15DBFA
controller_id 10
path_count 8
max_path_count 8
ctrl_LUN_# 000000000000000E
UID 600c0ff00015f5cd4d8b45520100000000000000000000000000000000000000
preferred_WWPN 
active_WWPN 217000C0FF15DBFA
fast_write_state empty
raid_status 
raid_level 
redundancy 
strip_size 
spare_goal 
spare_protection_min 
balanced 
tier generic_hdd
#

Configuring HP including logical drives and hosts

Settings are in general default unless specified.

To create HP P2000 G3 Vdisks, select requirements as appropriate. In the GUI, select Configuration View > Logical > Vdisks. For example, if you create 4 + P RAID-5 arrays with a spare and 1:1 mapping to volumes, the system data is stripped across all the LUNs in the controller storage pool. For performance and robustness, much larger disk-member arrays (Vdisks) are not recommended.

The HP P2000 G3 LUNS are default volume-mapped to all ports on the controller. This mapping is useful if the controller is separately zoned only to the system nodes. Otherwise time consuming, individual mapping of each system port is required. The LUNS cannot be shared. Access must be limited to the system ports only.

To detect a controller, it might be necessary to run the svctask detectmdisk and svcinfo lsdiscoverystatus commands.

Select the standard host profile and FC host type. Disk spin-down is not supported as unresponsive disks can result in taking storage pools offline.

To modify, resize, or remove a LUN, the LUN must be removed from any system storage pool and be in an unmanaged state first.
Note:
  1. Make sure that the storage pool is unmanaged (removed from any storage pool) on the system before you delete the LUN on the HP P2000 G3 storage system.
  2. Do not expand dynamic arrays on LUNs that are in use by the system. For arrays to be recognized by the system, the storage pool must be first made unmanaged by migrating or deleting the LUN from the storage pool.

LUN presentation

LUNs are exported through the available FC ports of the HP P2000 G3 storage system. Configure these LUNs as default mapping or explicit.

Special LUNs

There are no special considerations for logical unit numbering. LUN 0 can be exported where necessary.

Target ports

A HP P2000 G3 storage system has a total of four 8 GB Fibre Channel ports.

For example:
  # lscontroller
id controller_name ctrl_s/n             vendor_id            product_id_low       product_id_high 
    
0  hp-p2000-g3             CAPIPTAAf    HP                   P2000 G3              FC  

 # lscontroller 0
id 10
controller_name hp-p2000-g3
WWNN 208000C0FF15DBFA
mdisk_link_count 16
max_mdisk_link_count 16
degraded no
vendor_id HP      
product_id_low P2000 G3
product_id_high  FC     
product_revision T240
ctrl_s/n         CAPIPTAAf   
allow_quorum yes
WWPN 207000C0FF15DBFA
path_count 32
max_path_count 32
WWPN 247000C0FF15DBFA
path_count 32
max_path_count 48
WWPN 217000C0FF15DBFA
path_count 32
max_path_count 40
WWPN 257000C0FF15DBFA
path_count 32
max_path_count 40
# 


P2000 G3 WWNN and WWPN settings look like this: 

2PPP00C0FFVVVVVV
2                  -   IEEE 803.2 extended 48-bit ID NAA format,
PPP              -  vendor specific code used to identify specific ports
00C0FF       -   IEEE unique VSID of OEM Dot Hill for HP.
SSSSSS      -   unique vendor-supplied serial number for the device. 
  
WWNN 208000C0FF15DBFA
WWPN 207000C0FF15DBFA
WWPN 247000C0FF15DBFA
WWPN 217000C0FF15DBFA
WWPN 257000C0FF15DBFA

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 HP P2000 G3 storage systems are equal in priority, there is no benefit to using an exclusive set for a specific LU.

LU preferred access port

There are no preferred access ports on the model HP P2000 G3 as all ports are Active/Active across all systems.

Detecting Ownership

Detecting ownership does not apply to model HP P2000 G3.

Parent topic: Configuring HP P2000 G3 storage systems