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    Backup target - 2 or 4 drive NAS?

    Scheduled Pinned Locked Moved IT Discussion
    nassynologycomparisonbackups
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    • gjacobseG
      gjacobse
      last edited by

      When I was replacing the NAS (single drive, proprietary format) I looked at some of @scottalanmiller's comments on how much was my data worth.

      I went with a ReadyNAS 4 drive system running RAID10.

      I may only be using it to start photos, some music and movies,.. but some of it I can't replace. Can't find or get to photos taken in the late 1800's or early 1900's from family in Europe.

      I still need to do a off-site backup,.. but I have thought of a few ways to do so...

      1 Reply Last reply Reply Quote 0
      • DashrenderD
        Dashrender @scottalanmiller
        last edited by

        @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

        @Dashrender said in Backup target - 2 or 4 drive NAS?:

        Read/Write - 112/112

        Write is half the speed of reads, not the same.

        This is a claim from Synology's site.
        EiXISx6.png

        scottalanmillerS 2 Replies Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller @Dashrender
          last edited by scottalanmiller

          @Dashrender said in Backup target - 2 or 4 drive NAS?:

          @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

          @Dashrender said in Backup target - 2 or 4 drive NAS?:

          Read/Write - 112/112

          Write is half the speed of reads, not the same.

          This is a claim from Synology's site.
          EiXISx6.png

          You need to read these things more closely. Look again and see if you can spot where you are totally wrong and totally misunderstood their marketing.

          DashrenderD 1 Reply Last reply Reply Quote 0
          • DashrenderD
            Dashrender @scottalanmiller
            last edited by

            @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

            Two drive RAID 1 setup is cheaper and safer. Uses less power (about 11W less), generates less heat (tiny) and takes up less space (tiny difference.) But other than IOPS, it wins in every way.

            Sure, I understand this in theory, but haven't figured it out in practice.

            My current backups go to a Gen 1 Drobo 8 Bay SAN (iSCSI) that has to be shared off a server as Drobo doesn't support more than one iSCSI connection. Plus it's running Beyond RAID on 5 drives with a one drive fail allowance... It's pretty darn slow - probably slower than a single drive on it's own.

            scottalanmillerS 2 Replies Last reply Reply Quote 0
            • scottalanmillerS
              scottalanmiller
              last edited by

              I'm writing a response but waiting for you to figure out all of the things that you misunderstood.

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              • scottalanmillerS
                scottalanmiller @Dashrender
                last edited by

                @Dashrender said in Backup target - 2 or 4 drive NAS?:

                Sure, I understand this in theory, but haven't figured it out in practice.

                What do you mean? The smaller a RAID 0 is, the safer it is. It's that simple.

                DashrenderD 1 Reply Last reply Reply Quote 0
                • scottalanmillerS
                  scottalanmiller @Dashrender
                  last edited by

                  @Dashrender said in Backup target - 2 or 4 drive NAS?:

                  My current backups go to a Gen 1 Drobo 8 Bay SAN (iSCSI) that has to be shared off a server as Drobo doesn't support more than one iSCSI connection. Plus it's running Beyond RAID on 5 drives with a one drive fail allowance... It's pretty darn slow - probably slower than a single drive on it's own.

                  HOw does this relate to the associated statement? I'm unsure what the example is supposed to be telling us.

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                  • DashrenderD
                    Dashrender @scottalanmiller
                    last edited by

                    @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

                    @Dashrender said in Backup target - 2 or 4 drive NAS?:

                    @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

                    @Dashrender said in Backup target - 2 or 4 drive NAS?:

                    Read/Write - 112/112

                    Write is half the speed of reads, not the same.

                    This is a claim from Synology's site.

                    You need to read these things more closely. Look again and see if you can spot where you are totally wrong and totally misunderstood their marketing.

                    Average? ug.. ok - another meaningless thing.. thanks.

                    1 Reply Last reply Reply Quote 0
                    • DashrenderD
                      Dashrender @scottalanmiller
                      last edited by

                      @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

                      @Dashrender said in Backup target - 2 or 4 drive NAS?:

                      Sure, I understand this in theory, but haven't figured it out in practice.

                      What do you mean? The smaller a RAID 0 is, the safer it is. It's that simple.

                      What I was saying/meaning is that I haven't done an IOPs study to see what anything I'm doing it using IOPs wise. i.e. I've never run DPACK to see what my server reports it's IOPs to be doing, etc.

                      1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller @Dashrender
                        last edited by scottalanmiller

                        @Dashrender said in Backup target - 2 or 4 drive NAS?:

                        @scottalanmiller said in Backup target - 2 or 4 drive NAS?:

                        @Dashrender said in Backup target - 2 or 4 drive NAS?:

                        Read/Write - 112/112

                        Write is half the speed of reads, not the same.

                        This is a claim from Synology's site.
                        EiXISx6.png

                        So here is what I spot quickly:

                        1. I was wrong here, Synology makes the claim, but it's clearly nonsensical and must be a typo. It's impossible for that device to do that and impossible for them to know what you will get with components that they know nothing about.

                        2. Read the metric of the chart, that's not a drive speed metric, that's a networking metric.

                        3. You are seeing the speed of the NIC on the unit, not the drives. That chart is unrelated to the disks, RAID or storage. It's simply the network speed of the device.

                        4. You quoted RAID speeds but Synology isn't and can't tell you those. Those are determined by the specific drives in question and the RAID level. Synology can't know those things unless the chart is about your drives in particular. Synology doesn't make any claim that I see to telling us about RAID or drive speeds.

                        5. Storage performance is in IOPS and is a factor of the drives that you purchase far, far more than the NAS. The NAS has limits, but those should be worlds beyond the potential speeds of the drives. Millions of IOPS instead of hundreds or scores.

                        6. Mirrored RAID is always 1:2 no matter how you slice or dice it. This is something you just know, not something you ask a vendor about. Even looking at Synology for this info was fundamentally wrong.

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                        • scottalanmillerS
                          scottalanmiller
                          last edited by

                          What Synology has done, to make this claim kinda legit, is look at what disks "can" stream (which is more than is listed here) and added the "cap" of the network. So if you do a contrived operation that pushes the drives to their throughput limit (a useless number hence why we don't measure drives by that metric) but tells us nothing about performance. That could be just two or three IOPS producing that limit. But in the real world, that's not useful.

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