đánh giá wd re

*
Western Digital RAID Edition (RE) 4TB Enterprise drive sầu takes the RE family lớn the 4TB capathành phố limit. The new drive sầu offers a SATA 6Gbps interface with RAID-specific, time-limited error recovery (TLER), dual actuator technology, enterprise build quality to name a few of the features that make the Western Digital RE’s igiảm giá khuyến mãi for Enterprise users looking for the fine balance between performance & capathành phố.

Bạn đang xem: đánh giá wd re

Western Digital RAID Edition (RE) 4TB Enterprise drive takes the RE family lớn the 4TB capathành phố limit. The new drive offers a SATA 6Gbps interface with RAID-specific, time-limited error recovery (TLER), dual actuator technology, enterprise build unique to lớn name a few of the features that make the Western Digital RE’s igiảm giá khuyến mãi for Enterprise users looking for the fine balance between performance & capacity.

*

With 4TB capađô thị, these drives are igiảm giá khuyến mãi for bulk storage duties, such as JBODs, compute servers, đoạn phim surveillance and other demanding write-intensive applications. With Western Digital’s stated field-tested 1.2 million hour MTBF, the drive sầu is expected khổng lồ deliver the highest màn chơi of reliability for 24×7 operations. To build upon the reliability, Western Digital puts the drives through extended burn in testing with thermal cycling to ensure reliable operation. This reliability is what allows Enterprise have confidence and security that their operations won’t be effected by data failures or drive sầu failures that could cripple an operation.

Western Digital offers three Enterprise class drives to lớn their consumers, RE – SATA 6Gbps và 3Gbps, RE – SAS 6Gbps and Xe – SAS 6Gbps. Both the RE classes are a 3.5″ form-factor và range from 250GB to lớn 4TB capacities. The Xe class, which is an Ultra-fast SAS drive, comes in 300GB to lớn 900GB capacities. The Western Digital RE 4TB stands at top of Enterprise class capacities for Western Digital.

With the growing trkết thúc toward Cloud-based servers, companies are looking for more and more higher capathành phố drives and the manufacturers are responding with 4TB capacities và rumored 6TB to lớn 8TB drives down the road. The market is already filled with offerings from Hitachi, Seagate & Toshibố in 4TB capacities, so look for us to lớn have sầu nhận xét of these down the road.

Western Digital RE 4TB Enterprise Specifications (WD4000FYYZ)

Capacity: 4TBInterfaces: SATA 6GbpsSustained Sequential Transfer Speed: 171MB/sUser Sectors Per Drive: 7,814,037,168Physical Dimensions: Height 1.028 Inches, Depth 5.787 Inches, Width 4.00 InchesOperating Shock (Read): 30G, 2 msNon-operating Shock: 300G, 2 ms(Acoustics) Idle Mode: 31 dBA (average)(Acoustics) Seek Mode 0: 34 dBA (average)TemperatureOperating 41° F to lớn 131° F (5o C to 55o C)Non-operating -40° F lớn 158° F (-41o C to 70o C)Power nguồn DissipationRead/Write 9.70/9.50 WattsIdle 8.60 Watts

Aesthetics

The Western Digital RE hard drives have little difference in appearance from their consumer counterparts, except the nice bright yellow label stating “Enterprise Storage.” It is a nice touch just in case you have a bunch of drives in your spare parts box, as it would be difficult at first glance to tell what is Enterprise or what is a Consumer Western Digital Drive sầu.

*

The Western Digital RE 4TB is a standard 3.5″ hard drive sầu based on a SATA 6Gbps interface. We see the standard practice of Western Digital lớn place the heat-producing components in contact with the toàn thân of the drive sầu. This allows things lượt thích the controller, RAM, and motor driver lớn dispense heat inlớn the body toàn thân acting as a large heat sink. Also, Western Digital makes use of a foam pad placed in between the drive sầu and circuit board lớn help absorb vibration.

*

The circuit board includes a Marvell 88i9346 controller, as well as 64MB DDR2 of RAM from the Hynix H5PS5162GFR-S6C module.

*

Testing Background & Comparables

Comparables for this review:

2TB Western Digital RE4

All enterprise HDDs are benchmarked on our enterprise testing platform based on a Lenovo ThinkServer RD240. The ThinkServer RD240 is configured with:

2 x Hãng Intel Xeon X5650 (2.66GHz, 12MB Cache)Windows Server 2008 Standard Edition R2 SP1 64-Bit & CentOS 6.2 64-BitHãng Intel 5500+ ICH10R ChipsetMemory – 8GB (2 x 4GB) 1333Mhz DDR3 Registered RDIMMsLSI 9211 SAS/SATA 6.0Gb/s HBA

Enterprise Synthetic Workload Analysis

Our enterprise hard drive benchmark process preconditions each drive sầu into lớn steady-state with the same workload the device will be tested with under a heavy load of 16 threads with an outstanding queue of 16 per thread, and then tested in set intervals in multiple thread/queue depth profiles lớn show performance under light và heavy usage. Since hard drives reach their rated performance cấp độ very quickly, we only graph out the main sections of each demo.

Preconditioning and Primary Steady-State Tests:

Throughput (Read+Write IOPS Aggregate)Average Latency (Read+Write Latency Averaged Together)Max Latency (Peak Read or Write Latency)Latency Standard Deviation (Read+Write Standard Deviation Averaged Together)

Our Enterprise Synthetic Workload Analysis includes four profiles based on real-world tasks. These profiles have sầu been developed khổng lồ make it easier to lớn compare to our past benchmarks as well as widely-published values such as max 4K read and write speed and 8K 70/30, which is commonly used for enterprise drives. We also included two legacy mixed workloads, the traditional File Server & Webhệ thống, each offering a wide mix of transfer sizes.

4K100% Read or 100% Write100% 4K8K 70/3070% Read, 30% Write100% 8K128K (Sequential)100% Read or 100% Write100% 128KFile Server80% Read, 20% Write10% 512b, 5% 1k, 5% 2k, 60% 4k, 2% 8k, 4% 16k, 4% 32k, 10% 64kWebserver100% Read22% 512b, 15% 1k, 8% 2k, 23% 4k, 15% 8k, 2% 16k, 6% 32k, 7% 64k, 1% 128k, 1% 512k

Our first enterprise workloads, we measured a long sample of random 4K performance with 100% write & 100% read activity khổng lồ get our main results. The Western Digital RE 4TB measured 139 IOPS read và 208 IOPS write, which closely matches the performance of the Western Digital RE 2TB.

*

In our main average latency segment with a load of 16T/16Q, we measured an average read latency of 1837.48ms và a write latency of 1224.85ms from the Western Digital RE 4TB.

*

With just read activity, the Western Digital RE 4TB had a max response time of 4904.0ms, although with write activity max latency went up lớn 2833.0ms.

.

*

Reviewing the 4K latency consistency in our standard deviation section, the Western Digital RE 4TB came in at bottom of the pack with 497.07ms read standard deviation. It came in at the middle of the paông chồng with 117.70ms write standard deviation. As with the previous 4K performance of 100% write & 100% read activity, the Western Digital RE 4TB matches the performance closely khổng lồ the older Western Digital RE 2TB drive sầu.

*

Compared lớn the fixed 16 thread, 16 queue max workload we performed in the 100% 4K write kiểm tra, our mixed workload profiles scale the performance across a wide range of thread/queue combinations. In these tests we span workload intensity from 2 threads and 2 queue up khổng lồ 16 threads và 16 queue. In the expanded 8K 70/30 thử nghiệm, the Western Digital RE 4TB came in the behind the other two drives throughout the thử nghiệm, with the Western Digital RE 2TB leading the pack.

Xem thêm: Những Phần Mềm Diệt Virus Mien Phi Tốt Nhất Hiện Nay, 5 Phần Mềm Diệt Virus Miễn Phí Tốt Nhất Hiện Nay

*

Examining the 8K 70/30 average response times, the Western Digital RE 4TB maintains less than 1000ms average response times up through effective sầu queue depth of 24. It spikes to lớn slightly above sầu 1600ms at an effective queue depth of 32.

*

Over the duration of our primary tests at varying thread and queue depth levels, the Western Digital RE 4TB has the lowest max latency of 400ms at 2 threads và 2 queue depth màn chơi. At a 16 thread and 16 queue depth level, the Western Digital RE 4TB has the highest max latency of 4,800ms. Throughout the tests, Western Digital RE 4TB performed the best or in middle of the paông xã, except when reaching the higher thread và queue depth levels.

*

For the entire thread/queue spectrum, the Western Digital RE 4TB kept its latency fairly consistent and in line with the other two drives.

*

With the Western Digital RE 4TB, we have sầu added a 128K chạy thử to our Enterprise Synthetic Workload. The demo is a large blochồng sequential thử nghiệm which shows the highest sequential transfer speed for a platter drive. Taking a look at 128K performance of 100% write and 100% read activity, the Western Digital RE 4TB measured 151964 KB/s read và 149886 KB/s write, which outpaces the other drives in both read & write activity.

*

The next workload we used is our File Server protệp tin, putting the drives through a varying workload, where we scaled the thread và queue count from 2T/2Q up to lớn 16T/16Q. In this protệp tin, the Western Digital RE 4TB ranked middle of the paông chồng, while being outpaced by the Western Digital RE 2TB at its peaks, though it slightly outpaced the Seagate Constellation ES.2 3TB at higher thread/queue counts.

*

At all effective queue depths, there were no differences between the Western Digital RE 4TB and the other drives we tested. Though above 32 queue depths, the Western Digital RE 2TB separates itself slightly from the pachồng.

*

Comparing peak response times in our File Server protệp tin, the Western Digital RE 4TB remains in the middle of the paông xã, except at queue depth above 32, where it has the highest max latency.

*

Looking at the latency standard deviation, the Western Digital RE 4TB came in at the bottom of the pack in latency consistency.

*

Our final chạy thử is the Web Server chạy thử, which is traditional 100% read activity. The Western Digital RE 4TB also performs in the middle of the pack, once you hit an effective queue depths of 16 or above.

*

At effective queue depth loads below 32, the Western Digital RE 4TB maintained an average response time of under 1000ms in our Web Server workload. The Western Digital RE 4TB matches the performance of the Seagate Constellation ES.2 3TB, almost identically, with the Western Digital RE 2TB leading the paông chồng. 

*

For the duration of the varying loads in our Web Server protệp tin, the Western Digital RE 4TB was outpaced by both drives, by offering the highest max latencies at effective queue depths of 8 or above sầu.

*

Comparing latency consistency in our read-only Web Server protệp tin, the Western Digital RE 4TB matches the performance of the Seagate Constellation ES.2 3TB, almost identically.

*

Conclusion

The Western Digital RE 4TB with its top-tier capađô thị is a welcome addition to lớn the rich family tradition of the Western Digital RE drives. These Western Digital drives are built for the Enterprise users looking for performance while maintaining reliability and the ever expanding capađô thị requirements lớn meet your needs. With Western Digital’s trachồng record on its RE drives, there’s no reason to expect anything less from the Western Digital RE 4TB Enterprise drive.

Throughout all of our Enterprise Synthetic Workload chạy thử, the Western Digital RE 4TB performance is on par with the other enterprise class hard drives we tested: Western Digital RE 2TB & Seagate Constellation ES.2 3TB. The Western Digital RE 4TB did very well under our new 128K thử nghiệm which is designed to lớn show the best case scenario for hard drives. We were able lớn see the true potential of the larger capađô thị updated RE, it easily outpaced the other two drives in read performance và showed significant improvement in write performance.

One of the major concerns for IT professional, is the reliability of the hàng hóa and the likely hood the drive sầu will crash or corrupte their data. Though the track record of the Western Digital RE drives have been good, it is interesting to lớn note that it also has the lowest Mean Time Between Failures (MTBF) in its class at 1.2 million hour MTBF. The newer Seagate Constellation ES.3 offers a 1.4 million hour MTBF and Western Digital’s own HGST Ultrastar 7K4000 br& offers a 2.0 million hour MTBF. This doesn’t mean that the RE will actually fail more often, however it’s worth noting the MTBF quote lags the industry substantially.

Xem thêm: Hướng Dẫn Cách Chơi Cờ Tỷ Phú Bằng Giấy, Luật Chơi Cờ Tỷ Phú

Pros

Higher sequential transfer speeds than 2TB REHigh Capathành phố – 4TB

Cons

Outpaced in some places by the Western Digital RE 2TB driveLower Mean Time Between Failures (MTBF) than competition

Bottom Line:

The Western Digital RE SATA 4TB provides fast, & reliable performance with the largest available capathành phố and will give enterprise users a mật độ trùng lặp từ khóa boost for bulk storage applications.


Chuyên mục: Kiến thức