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Adam_a

Fujitsu Storage ETERNUS AF250 S2 Review

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Fujitsu has made a handful of changes under the hood to its ETERNUS AF250 array with the new version AF250 S2. It still comes in the same 2U form factor and with the same amount of total drives (48 with expansion equaling 737TB total leveraging the 15+TB drives). The design and management are also the same, however, Fujitsu added in a new Skylake CPU and optimized its flash storage software and enhanced the controller on the OS side. 

 

 

 

Fujitsu Storage ETERNUS AF250 S2 Review

 

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We bought the previous gen AF250 and abysmal documentation aside, are very happy with it. The only area where it is weak is when dedupe/compression are enabled. It would have been interesting to see how much of an improvement there is with the S2 model in this regard. The reduction numbers are very close to what we're seeing on Pure, but the performance hit is severe.

The Eternus line is very robust and cost effective (they even beat some other manufacturers' hybrid solution quotes). It's a shame they don't manage to sell more of then.

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The performance with DR on didn't really move from the lsat review we did. It's clearly a weak point for Fujitsu. That and the interface could be better. That said, teh performance per $ is pretty darn compelling. 

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Agreed, the interface is a bit tedious but it is at least reliable. Also it's not necessary to run in RAID10 to get great performance - RAID5 (7+1) is giving us excellent results and they seem to have the RAID5 write amplification under control: all the SSDs in the unit still show 100% life left after 6 months, even though they are rated as 1 DWPD.

When you tested with data reduction, did you run it with a single disk group or two for the TPP? The manual suggests much better performance with two disk groups.

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39 minutes ago, Ascendo said:

all the SSDs in the unit still show 100% life left after 6 months, even though they are rated as 1 DWPD.

That's one of the best things about what we're seeing out of flash arrays. The fears of wearing out SSDs have gone away and now vendors can offer a lower cost option vs the heavily over provisioned drives that have higher endurance. Glad it's working out for you. 

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When we looked at DR in our past tests on the Fujitsu AF250, we leveraged 12 RAID1 pairs. RAID5/6 options would get a bit different since you can work with much larger groups, but RAID1 resulted in a vast number.

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