Under normal circumstances unlikely enterprise application environments DIY own data center servers, mostly purchase HP, Lenovo and also other brand, because doing so could possibly get a much better pre-sale tech support team. However, so that you can satisfy the growing enterprise network application performance needs, usually also need to improve the amount of new servers, or by increasing the configuration of the existing server to raise the complete performance in the server, and the server disk drive is a effect on the complete performance ring.
We are saying the hard disk drive to upgrade the server, obviously, must seek to restrict the right server performance bottlenecks, for instance upgrading the server's disk drive can be taken into its network I / O throughput, it may well desire to use the newest harddrive-based interface type, to further improve the machine's memory expansion properties. Anyway, the server hard disk drive interface, are to some degree determines the technical structure, the transmission performance of the product and the like. Therefore, we should instead explore, server hard disc interface what sort of right questions prior to the election.
First, the landscape is still the SATA interface
SATA interface have been called "Serial Interface", so now with SATA hard disks are employed to interface called serial hard disk drive. Is it doesn't second following first IDE hard drive evolution. SATA physical design is modeled within the Fibre Channel, and so the usage of a four-core data cable. SATA interface development so far mostly are three forms of specifications, which are currently popular SATA-2 specification, the transmission speed all the way to 3GB / s, as shown for a certain model of SSDs utilizing a SATA-2 interface specification.
Featuring SATA-3 interface appears, as shown in the server it really is a Western Digital disk drive 3 SATA-3 interface is shown. SATA-3 interface in addition to the transfer rate around 6GB / s, but also for several data type provides read optimization settings. Obviously, for users, SATA-3 interface appearance does not necessarily mean the prevailing SATA-2 products will be eliminated, as the SATA-3, although with INCITS ATA8-ACS standard, however that will work with legacy SATA devices .
As the server harddrive SATA interface technology is quite mature and construction costs are certainly not high, so when compared with other interface forms of products, as well as market price is more civilians, shown in Figure 3. I think which the funds are not high corporate users, upgrading identical interface but larger capacity SATA-2 interface hard disk drive from the original server architecture, is best choice.
Second, the applying is more popular SCSI interface
SCSI server harddrive interface can be a server found in many now, and contains a data throughput, CPU share of low features: SCSI hard drive interface to plug computer drives have a very SCSI hard drive controller features an equivalent CPU control chip able to handle almost all of the work to replace CPU; Ultra 320 SCSI interface standard hard drive bandwith rate so far widespread 320MB / sec. SCSI interface server hard disk drives and SCSI controller shown in Figure 4.
Moreover, SCSI hot-swappable hard disk drives have SCA2 interface technology, but very well suited for deployment in this workgroup and departmental servers. SCSI hard drive has to be a SCSI interface to work with, now the server board are often integrated SCSI hard drive interface, you can even use a dedicated SCSI hard drive interface card to touch base more SCSI devices, so being able to scale is comparatively strong.
Well, SCSI interface, server harddrive, that's stronger compared to main aspects, also for the way the corporate environment? First, SCSI disk redundant array (RAID) good support to fulfill large enterprise data storage environment, while data security is usually guaranteed; Furthermore, SCSI hard disk speed is already up to 15000rpm, helping to make processing performance enterprise data center continues to be secured; over again, its low CPU utilization and multiprocessing features multitasking can growing enterprise environment provides a color force of data processing and storage support. Finally, through the economy price comparison view shown in Figure 6, SCSI interface harddrive in its entirety is gloomier than the SAS interface hard disc, but significantly over the SATA interface disk drive, so it is a lot better for that assembly of knowledge trapped in a certain security demand, capacity requirements, high processing performance requirements of enterprise environments.
Third, the quest for maximum performance SAS interface
"SAS" Serial Attached SCSI will be the concise explaination simple understanding is improved upon SCSI interface technology upgrade, the aim is always to further help the efficiency of SCSI technology, availability and scalability. Its feature would be the ability to connect as well more disk device, reduce expenses space in the server; for example SAS hard drive interface cuts down on the cable size, along with a finer combination of cable, along with a 2.5-inch SAS disk drive size, shown in Figure 7 namely Seagate (Savvio 15K.2) 2.5-inch SAS hard disk drive interface.
Better footprint makes this hard disk drive interface characteristics could be widely deployed inside blade server. Utilization in a 2U height eight 2.5-inch SAS hard drive bays is just about the choice of most OEM server vendors. Furthermore, your budget is just not high, can't replace the present server businesses, we can easily use both SAS and SATA harddrive upgrade coexistence, SAS hard drive interface makes good backward compatibility business users will use them in different applications. For instance SATA drives can be utilized for general transactional processing, and SAS hard disk drives might be aimed at the massive number of data, data availability is very important applications. Figure 8 shows a billion Information (SNT) launched the ST-1042SAS-D7 harddrive tray, it is the perfect mix SAS and SATA drives coexist which enables it to be taken with SAS or SATA disk drive controller card supports RAID 0,1 5 disk array model.
In contrast to the proportions of Ultra 320 SCSI hard disk drives, SAS computer drives being expensive, shown in Figure 9; This is mainly the reason why its better scalability, compatibility plus much more reliable fault tolerance. Through the server market, both at home and abroad happen to be the primary server vendors have introduced models with SAS hard disk drives, but the specific product applications and market conditions vary. Located in the department-level applications for example HP ProLiant DL380 G5, made for movies online services and e-commerce IBM System x3650 M2, etc., to provide a comprehensive support for SAS computer drives.
Fourth, the application of high-end optical interface
Fibre Channel (FC, Fibre Channel) is to increase the speed and flexibility of your multi-drive storage system was created interface, which may greatly enhance the communication speed multi-drive systems. The requirement for greater transmission of enormous amounts of ERP systems, or online real-time trading strategies, faster application response rate environment, this interface server hard disk drive is the foremost choice; of course, naturally, higher prices in their products several in-front, as shown in Fig.
How to pick the server harddrive interface have four doorways
In conclusion, the various server hard drive interface technology also determines their respective better with the environment. SATA drives alone server products now are rare, many are tower server applications for entry in. The SCSI and SAS Caused by CPU occupancy rate, multi-connected devices and lots of other functions, the performance was significantly much better than the SATA interface hard disc, it may be deployed inside enterprise data center, security, servers along with other application environments. Now apparently the marketplace for server harddrive or server products, they are mostly presented by 50 percent forms: Ultra320 SCSI and SAS / SATA.
It truly is undeniable that 2009 SAS hard drive has become the industry mainstream server harddrive platform, the recent interest in server hard disk upgrade business users, and up more likely to choose SAS platform besides, though your money is significantly over a length, nevertheless it will bring practical application is better.
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