III.
Disk & Disk Subsystem
s
GOLD:
Hitachi Data Systems' TagmaStore Universal Storage
Platform
Hitachi Data Systems' (HDS) TagmaStore Universal Storage
Platform (USP), the successor to HDS' L
ightning 9900 V series,
considerably ups the ante of what a storage area network (SAN)
array can do.
Our judges gave TagmaStore very high marks for its innovation.
TagmaStore isn't only a high
-
performance block storage array, it
can also virtualize Hitac
hi and selected third
-
party storage
devices attached to it. In other words, it's possible to access
TagmaStore's internal storage as well as externally hosted
storage through a single interface.
Virtualization isn't new, but embedding it into a storage ar
ray is.
Unlike virtualization pioneers such as DataCore Software Corp.
and FalconStor Software Inc., or more recent entrants like IBM's TotalStorage SAN Volume
Controller, HDS has foregone putting virtualization in the network in the form of an appliance o
r
as part of an intelligent switch. Instead, the virtualization capabilities reside in the "control unit," as
HDS puts it. This allows TagmaStore users to employ the same software functionality they are
familiar with from HDS Lightning arrays, and apply it
to any virtualized storage managed by
TagmaStore. Harnessing the power of virtualization without having to learn a new system is a big
win.
Then there are TagmaStore's performance specs, which are not too shabby. HDS says its top
-
of
-
the
-
line model boasts
an incredible 2 million I/Os per second; 81GB/sec aggregate internal
bandwidth; scalability to 32PB (that's right, petabytes) of capacity, including 332TB of internal
storage; and up to 192 Fibre Channel, 64 ESCON or 48 FICON ports. TagmaStore also has an
innovative cache partitioning feature that allows you to carve up TagmaStore storage resources
for various servers. This allows you to guarantee an application a certain level of service.
Powered by the third
-
generation Universal Star Network Crossbar Sw
itch architecture,
TagmaStore comes in three models: the USP1100, the USP600 and the entry
-
level USP100. But
be forewarned; this power and innovation doesn't come cheap.
SILVER:
Adaptec's Snap Server 18000
Adaptec's Snap Server 18000 is targeted squarely at small
-
to
medium
-
sized businesses. The device i
s a combination block
(iSCSI) and file array based on technology acquired from Snap
Appliance, San Jose, CA, which is now a division of Adaptec.
It scored highly for ease of use, integration and, of course,
value.
Priced at less than $5/GB, Snap Server 18
000 scales to 30TB.
That price is achieved by using low
-
cost serial ATA disk drives
(hot swappable), but the array also packs in RAID 5, dual Gigabit Ethernet ports, redundant
power and cooling, and UPS support. Then there's the software: BakBone Software
Inc.'s
Hitachi's TagmaStore arrays
can virtualize external storage
systems.
Snap server 18000, from Adaptec,
is a low
-
cost array
with RAID 5
SATA disks.
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