Kioxia CM6-V 6.4TB Enterprise SSD Review

Introduction and Drive Details

Kioxia (previously Toshiba) was the primary to market with PCIe Gen4 enterprise SSDs, or no less than that is how we bear in mind it going by 2019 Flash Memory Summit recollection. Fast ahead to right now, two years later, and we have lastly gotten our likelihood to see firsthand what PCIe Gen4 seems to be like as served up Kioxia model. We’ve already taken Intel’s latest PCIe Gen4 P5510 Enterprise SSD for a spin and seen for ourselves what double the bandwidth can carry to the datacenter in addition to SMB’s.

Obviously, because the second-largest producer of NAND on the planet, the CM6 is arrayed with Kioxia’s 96layer BiCS4 flash. BiCS4 96Layer TLC Flash has been round for happening three years now, and though we have seen others carry to market newer flash with greater layer counts, we have not seen any that may ship real-world efficiency that may match good ole Kioxia BiCS 4. We’ve noticed this reality within the shopper area the place our real-world efficiency leaders have one factor in widespread, and that is BiCs 4 flash arrays. Now we are going to display this taking place within the enterprise area as nicely. Remember, it isn’t about sequential speeds, neither is it about 8K random efficiency at QD256. It’s actually about how nicely an SSD can put all of it collectively and ship actual efficiency the place it issues most.

Quick Specs/Comparison Products

VIEW GALLERY – 29 IMAGES

Kioxia CM6-V Enterprise PCIe Gen4 x4 NVMe SSD

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This facet of the drive contains a familiar-looking producer label.

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The backside of the drive’s enclosure is a heavy-duty solid aluminum piece that serves as a warmth sink.

Specifications and Features

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Kioxia’s CM6 is a PCIe Gen4 x4 NVMe SSD is a 2.5″ x 15mm U.2 (SFF-8639) Enterprise SSD obtainable in capacities starting from 800GB as much as 12.8TB. Features embody a PCIe Gen4 x4 U.3 interface, Kioxia NVMe controller, BiCS4 TLC flash, dual-port entry, energy loss safety, a number of title areas, end-to-end information safety that includes superior proprietary bit correction on reminiscences within the information path for defense at each layer. Endurance is stellar at three drive writes per day for 5-years.

Current on-line pricing finds the 6.4 CM6-V 6.4TB retailing for about $2500.

Enterprise Testing Methodology

TweakTown strictly adheres to industry-accepted Enterprise Solid State Storage testing procedures. Each check we carry out repeats the identical sequence of the next 4 steps:

  1. Secure Erase SSD
  2. Write complete capability of SSD a minimal of 2x with 128KB sequential write information, seamlessly transition to subsequent step
  3. Precondition SSD at most QD measured (QD32 for SATA, QD256 for PCIe) with the check particular workload for a enough period of time to achieve a continuing steady-state, seamlessly transition to subsequent step
  4. Run check particular workload for 5-minutes at every measured Queue Depth, document outcomes

Benchmarks – Random and Sequential Performance

4K Random Write/Read

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We precondition the drive for 16,000 seconds, receiving efficiency information each second. We plot this information to watch the check topic’s descent into steady-state.

Steady-state is achieved at 8,000 seconds of preconditioning. The common steady-state write efficiency at QD256 is roughly 330K IOPS. The comparatively tight sample with nearly no outliers signifies a excessive QoS.

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Kioxia CM6-V 6.4TB Enterprise SSD Review 07 | TweakTown.com

We haven’t any drawback sustaining 335,000 4K random write IOPS which is 15K higher than the said sustained random write spec. At each measured queue depth, the CM6-V is outperforming its competitors by a big margin. Impressive.

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Kioxia CM6-V 6.4TB Enterprise SSD Review 09 | TweakTown.com

The datasheet for the CM6-V states random 4K learn efficiency of as much as 1,400,000 IOPS. We solely measure to queue depths of 256, which is probably going the rationale we’re topping out at 1.21 million IOPS. Intel’s P5510 outperforms the CM6-V at queue depths of as much as 64, then the CM6-V pulls away on this pure random check. Intel’s new 144Layer flash has the benefit in pure 4K random learn efficiency at low queue depths.

8K Random Write/Read

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We precondition the drive for 16,000 seconds, receiving efficiency information each second. We plot this information to watch the check topic’s descent into steady-state.

Steady-state is achieved at 9,000 seconds of preconditioning. The common steady-state write efficiency at QD256 is roughly 168K IOPS.

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We count on 8K random to trace precisely the identical as 4K random, simply at a 50% decrease fee. The CM6-V performs as anticipated. Low queue depth efficiency is phenomenal, actually the perfect we have seen from a flash-based datacenter SSD. Performance that issues.

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Here the CM6-V takes cost at QD32 and proceeds to put waste to the competitors as queue depths improve. We are seeing a mind-blowing 756,000 8K random learn IOPS at QD256. Wow. Again, Intel’s 144L flash has the benefit at decrease queue depths when the workload is pure 8K random learn.

128K Sequential Write/Read

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We precondition the drive for six,500 seconds, receiving efficiency information each second. Steady-state for this check was already achieved once we stuffed the drive with 128K seq information. The good, tight sample we’re seeing signifies a excessive QoS. Excellent.

The common steady-state sequential write efficiency at QD256 is roughly 4,000 MB/s.

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Kioxia CM6-V 6.4TB Enterprise SSD Review 17 | TweakTown.com

Our testing signifies manufacturing facility sequential write specs to identify on. More spectacular, nevertheless, is that the CM6-V can ship its max sustained write efficiency at QD1. Amazing actually.

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Again, manufacturing facility specs are spot on. 6,900 MB/s is head-turning sequential efficiency, however we’re extra impressed with how the CM6-V will get there. Look at that efficiency curve. It’s precisely what we wish to see. Look at how inferior the efficiency curve of the Gen4 P5510 is. Intel’s P5510 can ship somewhat extra at queue depths above 64, however it does not even swing into motion till QD32. As we see it, this can be a large win for the CM6-V.

Benchmarks – Server Workloads

Email Server

An Email Server workload is a demanding 8K check with a 50 % R/W distribution. This utility provides a superb indication of how nicely a drive will carry out in a write-heavy workload atmosphere.

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We precondition the drive for 16,000 seconds, receiving efficiency information each second. We plot this information to watch the check topic’s descent into steady-state.

Steady-State is achieved at roughly 9,000 seconds of preconditioning. The common steady-state workload efficiency at QD256 is roughly 300K IOPS. Impressive is an understatement.

Our information patterns once more point out excessive QoS.

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This chart demonstrates precisely why we imagine Kioxia BiCS4 flash is the real-world efficiency chief. We see it in shopper SSDs, and now we see it on the enterprise entrance. This is actual efficiency the place it issues, not one thing purely artificial just like the earlier checks we ran. Performance that issues and efficiency the ultimate the place it issues most is what the CM6-V is dispensing.

OLTP/Database Server

An Online Transaction Processing (OLTP) / Database workload is a demanding 8K check with a 66/33 % R/W distribution. OLTP is on-line processing of economic transactions and high-frequency buying and selling.

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We precondition the drive for 16,000 seconds, receiving efficiency information each second. We plot this information to watch the check topic’s descent into steady-state.

Steady-state is achieved at 11,000 seconds of preconditioning. The common steady-state workload efficiency at QD256 is a lofty 360K IOPS.

QoS is indicated as wonderful.

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Kioxia CM6-V 6.4TB Enterprise SSD Review 25 | TweakTown.com

As gorgeous as its Email Server efficiency is, its OLTP/Database efficiency is even higher. We have competitors in title solely as a result of the CM6-V has no flash-based competitors, no less than not in our check pool. Real efficiency the place it issues.

Web Server

A Web Server workload is a pure random learn check with a variety of file sizes, starting from 512B to 512KB at various proportion charges per file dimension.

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We precondition the drive for 16,000 seconds, receiving efficiency information each second. We plot this information to watch the check topic’s descent into steady-state.

We precondition for this check with an inverted (all-write) workload, so no related data may be gleaned from this preconditioning.

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Intel’s P5510 comes out on prime at queue depths of greater than 32. However, we see that as too little too late and provides the win to the CM6-V as a result of it maintains a small lead with this tough pure learn workload within the typical working vary.

Final Thoughts

The CM6-V was the primary Gen4 enterprise SSD, and it has proven itself to be the perfect so far. This is kind of wonderful and serves to cement our perception that Kioxia BiCS4 96L TLC is the perfect performing widespread flash presently employed on any SSD, whether or not they be shopper or enterprise just like the drive we examined right now. Other flash can attain greater speeds however can not match BiCS 4, the place the rubber meets the street.

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What’s the perfect performing flash-based enterprise SSD we have ever examined? That’s simple. It is Kioxia’s mighty CM6-V. Not solely is it by far the perfect performer, however it is usually essentially the most enduring we have seen so far. ROI the ultimate. Impressive in each means, the Kioxia CM6-V has earned TweakTown‘s highest award.

Pros:

  • Endurance
  • PCIe Gen4
  • Dual Port
  • Capacity Options

Cons:

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