2021-08-17T10:08:00Z

How does Dell's EMC PowerStore compare with its EMC Unity XT?

40

Why pick one over the other?

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44 Answers

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Top 5LeaderboardReal User

I agree with Leah... There are a bit more features/options with PowerStore, but the networking setup much more complex (too much if you ask me).  


Currently, there's no support for replicated NAS, so that's a big issue within our environment. 


The scale-out feature is nice, but there's a lot of limitations, i.e. data isn't spread across all of the available 'appliances' in a big pool. Volumes are isolated to a single 'appliance' and can be migrated to another appliance if one becomes full or to balance the system out. 


All in all, the product is still a bit too new and DELL needs some time to bake the product before I can fully endorse it. 


For those reasons, we recently deployed Unity. It's much simpler to deploy & support (especially with NAS).


If you remove NAS from the equation, then it's fine for Tier2 workloads, but to be honest, PowerStore has a ways to go before it gets my vote.

2021-08-30T15:52:52Z
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Unity XT was released in April 2019, so it's about 2.5 years old at this point, and as you can imagine, mid-tier storage technology has changed significantly in the past 2.5 years.  


PowerStore 2.0 supports end-to-end NVMe-FC protocol which is super-important if you're running an all-NVMe or all-SCM configuration on any array (not just Dell / EMC). Unity XT only supports legacy FC or iSCSI transport, both of which use legacy SCSI logic which was released back in the 1980's and was never intended for use with NVMe or SCM drives which use massive parallelism. 


Also, there are no persistent NVMe or SCM drive options for Unity XT... only old-school 12Gb SAS SSDs and classic spinning disks.


Also, fiber transport speed on Unity XT is capped at 16Gb/s where PowerStore uses 32Gb/s currently.  


PowerStore also has tons more compute and memory, which is necessary to run >1M IOPS.  For example, the biggest Unity XT array (880) uses only 64 cores and 768GB of memory, where the biggest PowerStore (9000) uses 112 cores and 2560GB of memory.


Since the cost per TB is nearly identical between Unity XT and PowerStore, I believe the business cases to choose Unity XT over PowerStore are pretty limited at this point.

2021-08-30T15:06:51Z
author avatar
User

HPE Storage 3PAR solution on TOP

2021-08-25T06:44:36Z
author avatarEvgeny Belenky
Community Manager

@Ali Ashraf can you please explain why?

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