The management console provides the option to activate the other two network interfaces on the array. This was done by enabling and modifying the settings of the two network interfaces that were not activated in the earlier steps.
Each of the unassigned network interfaces, eth1 and eth2, were assigned an address and activated. All three network interfaces must use the same subnet mask and default gateway.
The EqualLogic MPIO DSM (Device Specific Module) must also be installed onto the iSCSI initiator hosts. The DSM is available on the Host Integration Tools CDROM or from EqualLogic’s website.
The following performance data is not intended to be viewed as a comprehensive performance benchmark, but to provide a general performance overview for the EqualLogic PS3800XV Solution.
Selected performance results are shown below, using a standard server-class network adapter, with receive-side scaling on the host. This configuration used two paths from one host, two I/O workers, simultaneously accessing two target volumes and a queue depth of 5. Each volume shared round-robin access across both paths.
HDS TagmaStore™ AMS1000
The HDS TagmaStore AMS1000 is an iSCSI target solution that includes a dual-controller disk subsystem with SATA and/or Fibre Channel disk drives with raw capacities up to more than 200 TB. It includes cache binding, cache partitioning and a variety of hardware copy and management functions. In the iSCSI configuration it supports RAID 1, RAID 1 0, RAID-5 and RAID-6. The AMS1000 supports iSCSI, Fibre Channel and NAS protocols with the additional benefit of supporting two protocols simultaneously.
Hitachi's Adaptable Modular Storage is enterprise class storage designed and priced to meet the needs of small and medium businesses. The AMS line supports FC and iSCSI protocols and consists of three models, AMS200, AMS500 and AMS1000 and cost effectively support storage needs from under one terabyte to over 300 terabytes with the AMS200 and AMS500 being upgradeable in the rack. The AMS models have many features unique to the modular market including: RAID 6 (dual parity for highest availability); modular volume migration (non disruptive movement of volumes within the storage array); cache partitioning (allotment of cache memory size to specific applications) as well as support for both Fibre Channel and Serial ATA disk drives. When combined with Plug and play kits for Microsoft Simple SAN, Windows servers attached to AMS storage models can easily manage their storage as well as their entire storage area network.
The AMS1000 is initially configured for access by the Storage Navigator Modular software. Change the Storage Navigator Modular setting from "Operation Mode" to "Maintenance Mode". Select the desired AMS1000 array. From the Array System viewer select "Tools/Configuration Settings/iSCSI tab" to change the network settings for the iSCSI ports.
To create a LUN, the “Create Logical Unit” option is selected. This particular array was previously configured as a RAID 1 0 by the hardware field engineer.
Note – It is important at this point to note that the storage solution LUN size should not be confused with the size of the iSCSI target. The iSCSI target will be configured in a later step and is associated with the storage needed for a particular application on the host server. It is recommended that the LUN size on the storage hardware be as large as reasonably possible to allow the storage subsystem to optimize the use of the physical disks underlying the LUN that is created. In this case, as shown below, we are choosing to create one LUN at the maximum size available for this hardware. The iSCSI targets created later will fit into this one LUN, based on the needs of the host application.
The LUN must be formatted before it can be used by the hosts requiring storage. The format process runs in the background in the array and the LUN can be presented to hosts while the format operation is taking place.
Create iSCSI Targets
The LUN must be mapped to an iSCSI target before an iSCSI initiator can access it. This LUN will be mapped to two iSCSI targets, and then multi-path information will be applied at a later step.
The LUN is selected and it appears in the lower list. This LUN is mapped to target 000:T000 which belongs to port 0A. The port number will be used later as the internal target identifier.
Create Multi-path I/O for iSCSI Targets (optional)
The multi-path functions are handled by the Hitachi Dynamic Link Manager (HDLM) MPIO DSM that is installed on the application host server.
Configure Security for iSCSI Targets (optional)
The iSCSI target properties include the CHAP information, which can be set by choosing the authentication method drop-down box.
Make iSCSI Targets Ready for Use for iSCSI Initiators
The iSCSI initiator is assigned to the iSCSI target. Because multi-path has been selected, the same iSCSI initiator is assigned to targets 0A and 0B.