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Storage Industry Overview
1. Semiconductor device can be briefly divided into three major application
attributes:
1.1 Transfer interface protocol:
Stepping into Gigabit Serial transmission era. The traditional Parallel bus
has reached practical application bottleneck, it can’t be pushed to higher
transmission speed, therefore, the design of all storage components has
gradually been changed to Serial transfer. Currently, the Serial transfer
used in storage device mainly include: Serial ATA, IEEE 1394, FC, SSA
(IBM spec), the next generation Ultra 320 of SCSI is going to be
developed in to SAS (Serial Attached SCSI) serial interface; in the bus
aspect, Serial PCI Express interface promoted by Intel is going to be
launched soon.
Fabric-Attached Storage interface has become a trend. Currently, FC is
still the major Fabric-Attached Storage technology applied under the SAN
architecture, it includes two protocols based on two optical interfaces
such as: FCIP and iFCP. As compared to FC, the later version iSCSI,
along with its low price of only 1/2~1/3 that of FC and its competitive
advantage inherited from Ethernet, has been seen as a key technology to
speed up Fabric-Attached Storage.
1.2
API (Smart application processor):
Including virtualization, safety, QoS (Quality-of-Service), etc. Silicon
processor.
1.3 TOE (TCP/IP offload engine):
It can be divided into software and hardware (chip) type TOE, it is the
speedup processor of the internet packet of IP Storage, its main function
is to share the workload of the server so that server can put its attention
on executing other application functions and achieving a speed of
over Gbps.
3.1.2 Hard Disk
RAID is in charge of controlling the data I/O in between hard disc and host, and hard
disc takes charge the data storage capacity, Therefore, the future spec and technology
trend in hard disc has become an important index which affects industry development.
Hard disc mainly includes a disc, motor, access arm, read/write head, controller chip,
transmission interface port, power supply port, etc., the major transmission interface
includes ATA, SATA, SCSI, FC, wherein ATA almost occupies a high global market
share of 90% in the hard disc market, it is almost used for the PC market. However,
SCSI is used mostly in the enterprise customer, due to its high cost, FC interface is
used only for high level enterprise market, it only occupies 1% in the hard disc market.
p9
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