Kevin OBrien

Admin
  • Content Count

    1919
  • Joined

  • Last visited

  • Days Won

    38

Everything posted by Kevin OBrien

  1. Kevin OBrien

    Eaton 5P1550GR UPS Review Discussion

    I added the runtime chart, Eaton lists out the variable timing based on load points.
  2. 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.
  3. 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.
  4. Kevin OBrien

    Samsung 860DCT SSD Review Discussion

    The fishhook is the point in over-saturation where the drive decreases performance as latency increases.
  5. 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.
  6. 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)
  7. 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
  8. Kevin OBrien

    FIO Benchmark

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

    FIO Benchmark

    What are you testing? Also I've never used the -invalidate flag before, what is that used with?
  10. 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.
  11. 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
  12. Personally I’d push for that Toshiba SSD.
  13. 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
  14. 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
  15. Kevin OBrien

    Netstor NA611TB3 Review Discussion

    We tested it as JBOD, so each drive was tested individually at the same time.
  16. 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?)
  17. Kevin OBrien

    What Kind of Cache suitable for Ip camera

    What is the storage backend asking for these settings options?
  18. Kevin OBrien

    Controller for 4 8tb sas drives

    Sticking with Broadcom/Avago/LSI or Microsemi/Adaptec would be your best bet. On the OEM side, Supermicro and Dell leverage a lot of LSI products and as such there are some whitebox versions of the main LSI adapters available for a lower entry price or as system take outs. Now onto the main item, why do you need a 12gb/s adapter for HDDs? You could get a much cheaper price on something prior generation, unless you plan on adding flash into the mix.
  19. Sounds almost like the drive failed. If you take it out of the group and plug it into something else does it report anything?
  20. Kevin OBrien

    200TB SAN/NAS for feature film

    While ZFS might have some FS improvements some could argue, the dead simple file sharing capability and speed of SMB3 makes Windows the preferable option IMO.
  21. Kevin OBrien

    200TB SAN/NAS for feature film

    To put a bit of perspective on the CPUs, I was able to hit ~2.1M IOPS at about 20GB/s (bandwidth wasn't the limiter, only IOPS) on two 2.9GHz CPUs with 8 cores each. With the HDD platform you are looking at, nearly entry CPUs would probably work, file serving at this scale is very lightweight. Leveraging SMB3 for your file transfer protocol would be optimal if each side is Windows-based. (Win8+ and Windows Server 2012+).
  22. Kevin OBrien

    200TB SAN/NAS for feature film

    The newest processor lineup naming is still new for me, but if you shoot me a link to that page I'll give you a few options that make sense. Its really a clock speed times core count question.
  23. Kevin OBrien

    200TB SAN/NAS for feature film

    On the chassis, that model should work, although there may be better options out there, I haven't looked at the models vs pricing in a while. Getting a full package with chassis + expander + motherboard + SAS card would be better knowing you get matched components. CPU load for HDD storage is pretty low, you could go for fairly low-mid range CPUs and get out just fine. Same with DRAM... 16-32GB would probably get the job done easily. On NICs, really depends on cost versus what you need. Are you going direct attached to bypass a switch? I'd probably look at the Intel X520 or X540 NICs which are pretty cheap, and get three dual-port cards. Use one in the server and the other two in the desktops, direct attach with static IPs. If you have budget for a switch in that mix go for a Netgear model. Do a 2 SSD combo (240 or 480GB light enterprise) for RAID1/mirror boot drives.
  24. Kevin OBrien

    200TB SAN/NAS for feature film

    Windows Server and either hardware RAID or Storage Spaces would give you the sharing aspect you are after... at that point your bottleneck would be whatever network connection you planned on leveraging between the workstations and the server. I'd personally look at a Storage Server option from Supermicro... same basic chassis, but has the motherboard as well.
  25. Kevin OBrien

    Netgear ReadyNAS 4312X Review

    Nope, that IOPS figure is correct. For a pure HDD system, iSCSI 4k random is pretty tough.