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Storage Industry Overview
3.2 Storage System/Subsystem
The storage environment in the past is simple, for the management convenience
purpose, general server will include storage function (host system integrates disk array
device); however, the expansion in digital data in recent years is too rapid, and under
the trend that the backup management function needed in the storage becomes more
and more complicated and hard disc capacity becomes larger and larger, storage
device is thus gradually separated from the host system to form an independent device.
Therefore, the targets currently under discussion domestically are mostly storage
subsystem, however, most giant players in this market on this definition indeed does
not reach a consensus, they are thus normally called storage system.
Global RAID-Based storage systems are currently almost US-based PC/server
companies, it is a market occupied only few players and of high entrance barrier, the
top three players HP/Compaq, EMC, IBM occupy a market share of nearly 50%, the
top 10 players in this storage market are: DELL, EMC, Fujitsu, HDS, HP/Compaq, IBM,
NEC, Network Appliance, SUN.
What is “storage system”
According to a definition from IDC, a disk storage system equipment should include
several key components, these include RAID controller, cable for data transmission,
host adapter, at least three hard discs, and storage management application software.
Storage system can be installed inside the server, or can be connected externally to the
server. Generally, the target market of storage system follows the server market of the
enterprise, it can be briefly divided into work station/ small sized enterprise, medium
sized enterprise, large sized enterprise , etc.
3.2.1 Market segment and definition (1): target market
Storage systems are mostly connected or used in the server environment, based on
the deployment environment, storage market can be divided into small sized enterprise
(Entry-Level)→ medium sized enterprise (Mid-range level)→Large enterprise (High
level Enterprise), among them, the medium and small sized enterprise has the highest
growth potential (as shown in the figure), however, the growth in higher level or large
host is going to stay stagnant. The classification on storage system form IDC based on
the price (from hundreds of thousands to tens of millions) are roughly nine grades
(Brand 1~9), Dataquest further divide it into 6 grades based the number of hard disc
used (Class 1-6,hard disc ranging from 1~129 sets), we can thus see that most storage
systems are still used in the enterprise environment, and the host is mainly based on
high speed storage interface (such as SCSI or FC optical fiber); for the hard disc
interface used for storage, due to the continuous enhancement in stability and speed of
SATA hard disc as well as the concern for the reduction of IT total cost of ownership
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