Hitachi Block Storage driver support
PowerVC provides integrated support for the Enterprise Hitachi Block Storage Driver (HBSD). PowerVC does not include or support the OpenStack HBSD.
- Enterprise HBSD 14.0.0 driver
- Supported devices are listed in the Hitachi Block Storage Driver for OpenStack v 14.0.0 Release Notes®.
Requirements and recommendations
The PowerVC management server instance where Cinder is running should be in the same geographic location as the storage controller to reduce the effects of network latency on the management operations.
- The storage controllers must have the appropriate license, listed in the Hitachi Block Storage Driver for OpenStack Yoga.
- For the minimum firmware levels required, refer to the Hitachi Block Storage Driver for OpenStack Yoga.
- For other hardware and software requirements, refer to the Hitachi Block Storage Driver for OpenStack v 14.0.0 Release Notes.
- Before registering Hitachi storage in PowerVC, refer to the table below for supported
storage and thin pool combinations:
Table 1. Storage pool and thin pool selection matrix Pool type Supported as storage pool Supported as thin pool HDP
AIX® LKU support for Hitachi storage
- PowerVC version 1.4.4 fix pack 2 or later.
- Minimum CM-REST server version v10.1.0-00 or later.
- Minimum storage firmware version for VSP G1000, VSP G1500 or VSP F1500 is 80-06-74-XX/XX.
Restrictions and limitations
- A volume should not be managed by more than one PowerVC instance. Hitachi hardware can fail volume clone operations if a clone operation is issued by more than one PowerVC management instance.
- Each Fibre Channel port on the Hitachi controller can map up to 255 initiator Fibre Channel ports. Each PowerVM® NPIV adapter that is allocated to a virtual machine contains two virtual Fibre Channel ports. Therefore, each NPIV adapter consumes two initiator slots on a Hitachi Fibre Channel target port. For example, if a virtual machine has a total of four NPIV client adapters, eight initiator slots are consumed on the target port. In this scenario, the Hitachi Fibre Channel port can map volumes to 31 NPIV virtual machines.
- Hitachi storage uses the lowest WWPN on the Virtual I/O Server for VSCSI connections as the name of host group
when connecting a volume to a Virtual I/O Server. The HBSD host group naming convention is
HBSD-lowercase_initiator_wwpn, where lowercase_initiator_wwpn
is the lowest-valued NPIV or VSCSI WWPN, converted to lower case. For example, HBSD-c05076012345678a
would be an acceptable name, but HBSD-C05076012345678A would not.
If the Virtual I/O Server server VSCSI Fibre Channel ports are modified such that the lowest Fibre Channel WWPN changes, the host group names on the Hitachi controller must be renamed to match the expected HBSD-XXX naming convention.
- For Hitachi storage providers, PowerVC can only determine the port status if it
is cabled and active on a managed Fibre Channel fabric. Otherwise, the port status will be displayed
- Refer to Hitachi documentation to determine the number of cascade thin image copies your Hitachi storage controller can support from a single volume. The number of supported cascade thin image copies limits the number of possible parallel deployments from a single volume. Creating multiple images from a single volume does not increase the number of cascade thin image copies the controller can support from a volume.
- Hitachi only supports 32 characters of summary (sometimes called the title or
nickname) field for volumes. This means that volumes that are generated by PowerVC and are then later managed by a different
PowerVC server instance will be managed with a
volume name that is truncated from the original volume name.
If a virtual machine is managed with multiple volumes attached, you might need to use other properties to properly distinguish between the volumes. For example, the volume size or the Storage provider volume ID, which is the LDEV number for the volume on the Hitachi array.
- Consult Hitachi for the scaling limits associated with your Hitachi storage array and the number of concurrent operations that your Hitachi storage array is capable of processing.
- Refer to the below table for supported LDEV ranges:
Table 2. Maximum number of LUNS / LDEV ranges supported Hitachi model Maximum number of supported LUNS / LDEV range VSP G200
VSP G400, VSP G600
VSP G350, VSP G800, VSP F350
VSP G370, VSP F370
VSP G700, VSP F700
VSP G900, VSP G1000, VSP G1500, VSP F900, VSP F1500