Kevin OBrien

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Everything posted by Kevin OBrien

  1. NAS options are going to be more feature filled, have standalone storage options rivaling more DAS offerings and allow connectivity into things like Glacier, etc. To match the speed of a DAS though you'd need to work in 10Gb which makes it a bit more expensive. If you don't exceed 100MB/s though you may not even notice a difference. So it comes down to how to use the storage, since it will be the defining element in which direction to go.
  2. Consumer SSDs still fall into the category of its great if they work, but when things start to become problematic with firmware, it can be usually pointed to use the appropriate drive for the application. Have you tried the light enterprise version of the 860 Pro? I wonder if the slowdowns are related the the over-provisioning differences between those two drives. Hit a write workload where the drive needs to run GC, and that could be the slowdown. To rule this out you would need to manually over-provision the SSDs with something like HDPARM, then put them back into the RAID group. Those S4500s
  3. I think the main part worth considering is the usecase. I like separating out direct attached storage and NAS, without as much intermingling the standards.
  4. Kevin OBrien

    Seagate BarraCuda SSD Review Discussion

    Thanks for bringing it to our attention, the SQL Server charts have the typo. I'll correct those soon.
  5. Kevin OBrien

    Samsung 860 QVO SSD Review Discussion

    There is no doubt they suffer under heavy or sustained write workloads, each manufacturer will tell you that from the start. They are really designed for micro workloads or read environments, which these tests are designed to show. For people looking at smaller workload footprints, the smaller benchmarks help more than showing a drive performing poorly in an area it was never designed to go into.
  6. Kevin OBrien

    Dell EMC VxRail P570F Review Discussion

    Its more towards the different type of test they are. VDbench will run full bore to leverage as much storage I/O as it can, while the SQL Server test we run is latency focused. You could easily drive more I/O, but its goal is more of a set I/O and aiming for lowest latency.
  7. Kevin OBrien

    Dell EMC VxRail P570F Review Discussion

    VDbench results surrounding database performance are geared more to show what full pedal to the metal performance potential is. Our SQL Server Benchmark Factory test is more useful at showing what a heavy load database does from a latency perspective. HCI traditionally will be a few steps slower than a SAN, but a SAN isn't the main competition. Its more towards integration, ease of use, etc while still being fast enough for most usecases.
  8. We we leveraging a 16Gb FC network (8 total ports out of the array). Switching was through two Brocade G620 switches
  9. Kevin OBrien

    Affordable & reliable RAID 1 controller

    Easiest might be... do you want a free RAID card from us?
  10. Kevin OBrien

    Eaton 5P1550GR UPS Review Discussion

    I added the runtime chart, Eaton lists out the variable timing based on load points.
  11. Kevin OBrien

    Intel Virtual RAID on CPU (VROC) Review

    We do track/collect CPU stats during the runs as part of the vdbench logging if you wanted to see more of the raw output. Its just not a part that we track.
  12. Kevin OBrien

    H700 vs 9265-8i

    If you have plans of only running hard drives, I don't think you will see any difference between those cards.
  13. Kevin OBrien

    Samsung 860DCT SSD Review Discussion

    The fishhook is the point in over-saturation where the drive decreases performance as latency increases.
  14. Kevin OBrien

    Intel SSD 660p Series Review Discussion

    Its not corruption, its a function of the test. Prior charts as posted are graphed on IOPS vs queue depth. The new charting method charts IOPS versus latency. With consumer drives as they get overloaded, latency spikes up and IOPS will actually pull back, causing the swinging motions. These are charted with VDbenches curve profile. unrestricted workload starts, measuring the "100%" performance of the drive, then it scales from 10-120%, plotting the bathtub profile up to and through peak saturation. Some drives peak more gracefully than others. Drive models that have very smooth and predictable lines are generally the highest performing. Drives that get bogged down and go nuts are the ones that lag on performance. For QLC drives we are actually working on an even smaller subset of tested drive surface to allow the drive to better cope with the workload. Those will be coming out soon.
  15. Toshiba's new MG03 SATA enterprise 3.5" hard drives are now being offered as standard or encrypted models in the industry's highest capacity ranging up to 4TB while spinning at 7,200RPM with a SATA 6Gb/s interface. As we noted in our recent review of the MG03 4TB SAS, Toshiba has seen increasing demand for encryption and as such, they will now be offering it across all of their new models. As with the sibling SAS drives, the SATA drives offer a big jump in capacity to 4TB from 2TB as well as up to 18% faster sustained transfer rates and power consumption reduced significantly by up to 15%. Rounding out the enhancements, this new generation of SATA drives now interface over 6Gb/s SATA instead of 3Gb/s. Toshiba SATA HDD Enterprise 3.5" Review (MG03ACAx00)
  16. Kevin OBrien

    FIO Benchmark

    This is the line for full latency, and correct that it is in microseconds: lat (usec): min=211, max=466, avg=267.94, stdev=18.39
  17. Kevin OBrien

    FIO Benchmark

    Context of what your are testing will help greatly on this.
  18. Kevin OBrien

    FIO Benchmark

    What are you testing? Also I've never used the -invalidate flag before, what is that used with?
  19. Kevin OBrien

    Fujitsu Storage ETERNUS AF250 S2 Review

    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.
  20. With the recent launch of VMware's vSphere 6.7, we used some time last night to upgrade our main testing equipment. This included many of our Dell PowerEdge R730s and Dell PowerEdge R740xds which received firmware upgrades at the same time. To make all of this as painless as possible, we leveraged Dell's Lifecycle Controller for all things firmware on our servers, and VMware's upgrade tools for our vCSA and ESXi hosts. In this article we cover the steps we used to update and upgrade our servers. In the Lab: Upgrade to VMware vSphere 6.7
  21. Personally I’d push for that Toshiba SSD.
  22. The WD Sentinel DX4200 Storage Server is the company's latest effort to bring SMBs storage that's both easy to use and simple to manage. The DX4200 builds on the DX4000 that was released about three years ago. Key updates include a modern OS, Windows Storage Server 2012 R2 Workgroup, and a more powerful Intel Atom processor. Inside the 4-bay enclosure are WD Se enterprise SSDs that are designed for high-end NAS work and can offer capacities up to 16TB raw. WD has also pulled over a unique feature from their micro-server line, offering a dedicated boot drive for the system which makes going from box to production faster, allows for safer system updates down the road (by reducing data disruptions), and storage capacity isn't lost to the OS. WD also offers a variety of warranty and support options to make sure SMBs worry less about their storage and more about business operations. WD Sentinel DX4200 Storage Server Review
  23. Western Digital announced the WD Sentinel DX4000 last month in an effort to bring easy to configure NAS storage to SMBs with fewer than 25 employees. At the core of the Sentinel is Microsoft's Storage Server 2008 R2 Essentials, an Intel 1.8 GHz Atom dual-core processor and two or four WD RE4-GP hard drives. Western Digital sells the Sentinel pre-configured with drives in either 4TB or 8TB models right now, with 6TB and 12TB models coming early next year. Given the Sentinel arrives with drives and is ready to roll, all it takes to get going is powering the unit up and connecting to the network, which is great for those who aren't used to dealing with storage appliances. Given the Microsoft software though, there's still plenty to tweak under the covers should SMBs with access to IT professionals care to do so. Read Full Review
  24. Kevin OBrien

    Netstor NA611TB3 Review Discussion

    We tested it as JBOD, so each drive was tested individually at the same time.
  25. Kevin OBrien

    Western Digital Black 2TB Read Drops

    You could try a return to see if a drive defect is coming into play with this. What is actual performance like (moving files on and off the drive?)