đánh giá sshd seagate

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The Seagate Desktop SSHD hybrid is the first desktop 3.5″ khung factor, 6Gb/s SATA interface drive. The SSHD hybrid is Seagate’s marriage of solid state performance with hard disk drive sầu capacity at an affordable price. Using NAND flash to lớn increase system performance, Seagate claims the SSHD hybrid will increase system performance by up to lớn 4x faster than standard 7,200 RPM HDD by using adaptive sầu memory technology that learns the data users access most frequently & adds it khổng lồ the solid-state memory for instant access.

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The Seagate Desktop SSHD hybrid is the first desktop 3.5″ form factor, 6Gb/s SATA interface drive sầu. The SSHD hybrid is Seagate’s marriage of solid state performance with hard disk drive sầu capacity at an affordable price. Using NAND flash khổng lồ increase system performance, Seagate claims the SSHD hybrid will increase system performance by up khổng lồ 4x faster than standard 7,200 RPM HDD by using adaptive memory công nghệ that learns the data users access most frequently and adds it to the solid-state memory for instant access.

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While Mobile users have had access to Seagate hybrid drives for a long time, up until now desktop users had khổng lồ choose between the superior speed of SSD versus the relatively inexpensive storage space of HDD (or some combination of both). The Seagate Desktop SSHD Hybrid theoretically gives users the best of both worlds. Whether you’re a gamer with hundreds of games, a business that uses multiple large programs, or just a music và movie buff that has thousands of both, with the SSHD Hybrid you won’t have khổng lồ sacrifice speed for storage or storage for cost và the solution is easy to lớn deploy, no additional software or configuration is required.

Seagate’s approach with hard desktop hard drives is two-fold. For high capađô thị drives they’ve opted lớn go with a slower spindle speed and 4TB top-kết thúc capacity with the recently released HDD.15. The hybrid then takes over as Seagate’s performance line thanks to the NAND cabịt, but tops out at just 2TB. Seagate will likely release other larger capađô thị desktop SSHD drives in the future, but for now they’re trying to lớn hit price points that OEMs and end users will adopt the hybrid concept. Adoption is a key point though, while the notebook 2.5″ hybrid drives have sầu had decent acceptance, the desktop market has more challenges largely thanks to multiple drive sầu slot availability & continued lower price points on SSDs. Thus, desktop users can cost effectively combine an SSD for boot duty and for core applications, which standard HDDs can be used for truyền thông files và other use cases where there’s less of a need for SSD performance. Seagate also faces off against software solutions that can leverage a low capacity SSD as a caching solution for hard drives.

The Seagate Desktop SSHD Hybrid comes in two capacities, 1TB or 2TB. The street price of the 1TB is $100.00 & the street price of the 2TB is $140.00. Both come with a 3-year warranty.

Seagate Desktop SSHD Hybrid Specifications:

Capacity1TB (ST1000DX001)1x1TB platter2TB (ST2000DX001)2x1TB plattersInterface: SATA 6Gb/sSpindle: 7,200 RPMCache: 64MBNAND Cache: 8GB MLCAverage Data Rate from NAND: 190 MB/sAverage Data Rate: 158 MB/sAverage Latency: PowerOperating: 1TB 5.9W, 2TB 6.7WIdle: 1TB 3.3W, 2TB 3.6WEnvironmentalOperating Temperature 0° lớn 60°CNon-operating Temperature -40° to lớn 70°CDimensions (LxWxH):1TB 146.99mm x 101.6milimet x trăng tròn.17mm2TB 146.05mm x 101.6milimet x 26.11mmWeight:1TB 400g (0.88lbs.)2TB 408g (0.90lbs.)Warranty: 3 years

Design và Build

The Seagate Desktop SSHD Hybrid features the same design as their other desktop hard drives (Seagate Barracuda and Seagate HDD 1.5). The top cover is silver containing the relevant sản phẩm information. The body toàn thân of the drive sầu is blachồng metal.

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The Seagate Desktop SSHD Hybrid is a 3.5″ size factor & easy khổng lồ install. Insert the SSHD Hybrid into an empty bay, screw it inkhổng lồ place, & plug in the power & SATA cables. Go lớn Seagate’s trang web lớn get their không tính tiền program (discwizard) khổng lồ copy all the information from the old boot drive sầu to lớn the SSHD Hybrid drive sầu. Once the information is copied, turn off the computer, switch the SATA cables, và then reboot the computer. The Adaptive sầu Memory Technology will take a few tries to get down what you use most frequently resulting in an increase in tốc độ as the drive is used.

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At the heart of the Seagate Desktop SSHD is a LSI disk controller paired with an eASIC SSD controller that leverages the on-board 8GB Toshiba MLC NAND.

Performance

Comparables for this đánh giá include recent 7,200RPM desktop-grade HDDs from Seagate, Hitachi and Western Digital. To measure the performance of standard versus hybrid HDDs we measure the full LBA span across all hard drives, while limiting LBA activity to lớn just 5GB on the Hybrid mã sản phẩm lớn show cached performance.

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

2 x Hãng sản xuất Intel Xeon X5650 (2.66GHz, 12MB Cache)Windows Server 2008 Standard Edition R2 SP1 64-Bit & CentOS 6.2 64-BitHãng sản xuất 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 inlớn steady-state with the same workload the device will be tested under a heavy load of 16 threads with an outstanding queue of 16 per thread, & then tested in mix intervals in multiple thread/queue depth profiles to lớn show performance under light & heavy usage. Since hard drives reach their rated performance màn chơi 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 been developed lớn make it easier to compare to our past benchmarks as well as widely-published values such as max 4K read và write tốc độ và 8K 70/30, which is commonly used for enterprise drives. We also included two legacy mixed workloads, the traditional File Server và WebVPS, 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

In our first workload we look at the performance of each 4TB hard drive sầu with a 100% random 4K write or 100% 4K read workload. In this test the Seagate SSHD 2 TB trailed the Hitachi 7K4000 và WD Blaông xã with transfer speeds measuring 151 IOPS write & but came out on top with transfer speeds measuring 117 IOPS read. The SSHD 2TB cabịt really shined with transfer speeds measuring 285 IOPS write và 267 IOPS read.

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With an effective queue depth of 256 (16T/16Q) the Seagate SSHD 2TB had a read latency measuring 2,179ms và a write latency measuring 1,681ms, coming in slightly under the Hitabỏ ra Deskstar 7K4000 in write latency & slightly over in read latency. Again the SSHD 2TB cađậy was well ahead of the pack.

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Comparing max latency, the Seagate SSHD 2TB came in upper-middle of the paông xã, with a peak write latency of 4,738ms và a peak read latency of 5,360ms. The SSHD 2TB cabít came in first with a peak write latency of 2,546ms & a peak read latency of 2,823ms.

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Comparing 4K read và write latency standard deviation, the Seagate SSHD 2TB came in upper-middle of the paông chồng of comparables in this group.

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Switching to lớn our 8K 70/30 mixed workload, we measure performance from a low load of 2T/2Q (QD4 effective) up lớn 16T/16Q (QD256 effective). In this setting the Seagate SSHD 2TB came in near the top almost matching the Hitabỏ ra Deskstar 7K4000. The Deskstar pulled ahead at the larger load while the Seagate SSHD 2TB plateaued. Again the Seagate SSHD 2TB cabịt was leaps and bounds above sầu the rest.

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Average latency in our 8K 70/30 profile varied between 37.48ms at 2T/2Q up to lớn 2,248ms at 16T/16Qfor the Seagate SSHD 2TB and between 16.26ms at 2T/2Q up to lớn 827ms at 16T/16Qfor the Seagate SSHD 2TB cabít.

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Comparing max latency between each hard drive sầu, the Seagate SSHD 2TB had lower peak response times than most over the duration of the kiểm tra that got magnified as the queue depth increased.

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With lower peak response times than most in our 8K 70/30 workload, it also had slightly better latency consistency, but still ranked below the Hitađưa ra Deskstar 7K4000.

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Comparing the sequential performance of each hard drive in a 128K sequential workload, the Seagate SSHD 2TB had the highest sequential read speed measuring 194.7MB/s. The SSHD 2TB also came in first with a write speed of 199.4MB/s (ranked first overall).

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Our next mixed workload measures the performance of each hard drive in our traditional File Server protệp tin with a transfer kích cỡ ranging from 512b khổng lồ 64K. Over most of the range in thread/queue loads the Seagate SSHD 2TB ran neông chồng and neông xã with the Hitađưa ra Deskstar 7K4000, performing above sầu the other hard drives. Performance from the Seagate SSHD 2TB scaled from 86 IOPS at 2T/2Q khổng lồ 106 IOPS at 16T/16Q, while the Seagate SSHD 2TB cabịt scaled from 160 IOPS to 179 IOPS.

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Across the thread/queue levels in our File Server workload, the Seagate SSHD 2TB ranged from an average latency of 46.15 ms at 2T/2Q khổng lồ 2,398ms at 16T/16Q putting it on par with the Hitachi Deskstar 7K4000.

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Across the spectrum of applied loads, the Seagate SSHD 2TB was able lớn suppress its peak response times better than the WD Black, which had the highest peak latency in the group. This compared lớn the Seagate Desktop 4TB that kept it better managed in this particular workload.

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Switching our view to lớn latency consistency in our File Server workload, the Seagate SSHD 2TB came in near the top of the hard drive pack, plateauing near the greater load.

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Our last mixed workload measures performance in our Web Server protệp tin, which includes transfer sizes of 512b lớn 512K in a completely read-only pattern. With this 100% read activity, the Seagate SSHD 2TB came in at the top of the pack, with transfer speeds ranging from 93 IOPS at 2T/2Q to lớn 115 IOPS at 16T/16Q, whereas the Hitađưa ra Deskstar 7K4000 scaled from 88 IOPS khổng lồ 112 IOPS.

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Average latency in our Web Server profile ranged from 42.96ms at 2T/2Q up khổng lồ 2,210ms at 16T/16Q.

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Looking at max latency in our Web Server profile, the Seagate SSHD 2TB came in behind the Hitabỏ ra 7K4000. The Seagate SSHD 2TB however outperformed the others.

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The Seagate SSHD 2TB maintained its good performance in terms of latency in our standard deviation thử nghiệm, with latency consistency ranking towards the top of the pack in our Web Server profile, running neông xã & neông chồng with the Hitachi Deskstar 7K4000.

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Conclusion

The Seagate Desktop SSHD is the first desktop 3.5″ khung factor hybrid HDD, with prior offerings being sold in the 2.5″ khung factor for Mobile users. The SSHD gives users “SSD speed” for increased system performance và faster boot up combined with HDD storage space. The Adaptive Memory Technology learns your most frequently used programs and writes them in the SSD speeding up system performance over time. At the time of this writing the maximum form size is 2 TB. And having mechanical parts in the HDD side will leave sầu the SSHD Hybrid susceptible to the same wear and tear as regular HDD. However, if the SSHD predominantly reads from the SSD và writes lớn the HDD you could potentially increase the life of the drive sầu.

In terms of performance, we found the SSHD to lớn offer a boost in performance across all workload-types in a “cached” setting with a 5GB hot data zone. Limiting current Desktop SSHDs to only 8GB of NAND flash does limit how many applications will fit inside cađậy, although increasing the amount of NAND would undoubtedly increase the cost & nudge users to consider a full SSD instead. Comparing raw performance, cached versus uncached offered 2-3x gains, giving users the performance of a 10K HDD for cached items. This falls quite a bit short of full SSD performance which is orders of magnitude higher, but still measurable gains.

The real problem for the hybrid concept in the desktop is that the space constraints that notebook users face just aren’t there in the desktop space và neither are many of the compromises. Take a typical desktop user who wants a faster machine. Buying a sub $100 boot SSD and moving the current HDD to bulk storage will accelerate the system more than inserting a hybrid hard drive sầu. Newer systems are also taking advantage of mSATA slots lớn tie in with the OS khổng lồ accelerate hard drives. If we accept for a moment that some people may want a single drive sầu to lớn reduce complexity and management, then even in that case the cabịt is so small (0.4% in the 2TB model) that users will likely find aggregate performance khổng lồ be closer to that of the base hard drive, outside of certain tasks lượt thích booting & other highly repetitive activities. In the kết thúc, the idea of what hybrid can deliver is exciting, but products of this nature should really be compared only lớn other like-kích thước HDDs, where they can extover performance within the category. Just don’t expect the oft marketed “SSD Performance” clayên lớn be very accurate as again it is not in this case.

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Pros

2-3x performance gains over standard 7,200RPM HDDs when measuring 5GB hot dataAdaptive sầu Memory Technology showed gains for all workload typesPriced to compete directly with standard 7,200RPM hard drives

Cons

Currently tops out at 2TB capacityOnly 8GB NAND cacheCached performance is well under recent generation budget SSDs

The Bottom Line

The Seagate Desktop SSHD Hybrid is a way khổng lồ give hard drive sầu users a modest bump in speed, but don’t be sidetracked by SSD claims. Hybrid công nghệ today certainly extends hard drive performance, but comes nowhere cđại bại khổng lồ the “SSD Performance” purported by Seagate.


Chuyên mục: kiến thức