Kevin OBrien

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Kevin OBrien last won the day on July 3

Kevin OBrien had the most liked content!

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About Kevin OBrien

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    StorageReview Editor

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  • Location
    Somewhere, USA
  • Interests
    Motorcycling, camping, geocaching, breaking electronics

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  1. 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
  2. Kevin OBrien

    FIO Benchmark

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

    FIO Benchmark

    What are you testing? Also I've never used the -invalidate flag before, what is that used with?
  4. 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.
  5. 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
  6. Personally I’d push for that Toshiba SSD.
  7. Kevin OBrien

    Netstor NA611TB3 Review Discussion

    We tested it as JBOD, so each drive was tested individually at the same time.
  8. 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?)
  9. Kevin OBrien

    What Kind of Cache suitable for Ip camera

    What is the storage backend asking for these settings options?
  10. 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.
  11. Sounds almost like the drive failed. If you take it out of the group and plug it into something else does it report anything?
  12. 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.
  13. 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+).
  14. 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.
  15. 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.