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WWN may only be assigned to a single HSD on each Fibre Channel port.
SANtinel software may be used to authorize multiple hosts to access a
particular HSD. SANtinel software may be further used to permit or deny a
particular host to access individual LUNs within the HSD, based upon the WWN
of the host.
SANtinel software may be used to create up to 128 HSDs per physical Fibre
Channel port. Each HSD may contain up to 256 LUNs, with the maximum
number of LUNs contained within all HSDs on a given Fibre Channel port
reaching 512.
7. Hitachi Virtual LUN and LUN Expansion Software
Virtual LUN software allows administrators to convert fixed-size volumes into
several smaller, variable custom-sized volumes. Using the Resource Manager
software, users can configure a specific number of megabytes to each custom
logical volume image LUN. Virtual LUN software improves data access
performance by reducing logical-device contention as well as host I/O-queue
times, which can occur when several frequently accessed files are located on a
single volume. Multiple LUN types can be configured within each RAID group.
Virtual LUN software enables administrators to more fully utilize the physical
storage capacity of the Hitachi Freedom Storage systems, while reducing the
amount of administrative effort required to balance I/O workloads.
When Virtual LUN software is used in conjunction with FlashAccess
software, the user can achieve even better data access performance than when
either Virtual LUN software or FlashAccess software is used alone.
The LUN Expansion Manager allows administrators to create virtual LUNs
that are larger by expanding the size of a selected LUN. The maximum size is
2TB.
8. Hitachi FlashAccess
™
S o f t w a r e Allows Data to be “Locked and
Unlocked” in Cache On-the-fly
The Hitachi FlashAccess software utility allows users to dynamically “lock”
and “unlock” data into cache in real time. Read and write functions are then
Hitachi Data Sy s t e m s
46
Figure 28 – SANtinel
software uses pre-defined
zones to protect data
from unauthorized
access.