Compaq External RAID Controller & Subsystem Infortrend Bedienungsanleitung PDF herunterladen (Seite 15)

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Storage Industry Overview

Desktop market

99.6% 0.4% 0%

Enterprise

market share

10.3% 78.7% 11%

Source: Dataquest2003, summarized by PROMISE

Revolutionary new storage interface: Serial ATA

The spec of Serial ATA 1.0 is co-made in 2001 by APT, DELL, Intel, Seagate, Maxtor,

etc. The initial main purpose of SATA is to replace ATA, relative to ATA, SATA has many

revolutionary improvements:

 Finer cable to solve the space management issue within the computer

frame.

 Faster and more effective serial transmission enables the transmission

speed of 1.5Gb, 3Gps, 6Gps.

 Less pin count.

 More power-saving

 More direct connection, no M/S setting is necessary.

 Support hot-swap

These milestone improvements have made SATA a even friendly product than SCSI

and FC, to storage system itself, the superiority in price/performance ratio has mande

SATA the optimum replacement for SCSI or FC. In the past, ATA hard disc is inferior to

SCSI in both speed or stability, plus the limitation in cable length, it is thus not widely

used in the enterprise storage environment, however, the new generation SATA

interface seems to re-write the hard disc history. SATA Workgroup has made a seven

year plan for SATA spec in one time, this includes the main specs of SATA first

generation (1.5Gb), second generation (3.0Gb) and third generation (6.0Gb), even the

related storage in NAS is planned, SATA is never inferior to SCSI in terms of its

superior transmission speed and more advanced functions. Most importantly, it inherits

the low price superiority of ATA, it is believed to gradually penetrates into the SCSI’s

application in enterprise storage market. The reasons are as in the followings:

 ATA hard disc has become more stable and mature in technology.

 Price superiority, with price of 2 to 3 times lower than SCSI.

 Breakthrough design in spec and function.

 Optimum price/performance ratio

Spec comparison between Serial ATA and traditional Parallel ATA

Spec comparison Parallel ATA (parallel) Serial ATA (serial)

Software

compatibility

- Compatible to Parallel ATA software

Price

- Similar to parallel ATA (but higher in price

in the first step)

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