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    RAID for Four Disks

    Scheduled Pinned Locked Moved IT Discussion
    raidstandard pattern
    14 Posts 4 Posters 1.8k Views
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    • DashrenderD
      Dashrender
      last edited by

      Nice post, but as you mentioned, it's a seemingly unnecessary one because of the obviousness of the situation.

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

        @iroal said in RAID for Four Disks:

        @scottalanmiller

        Try to explain this to my boss.

        For him Raid 10 does not exist only Raid 5 or 6..

        Is he simply unaware that RAID 10 exists?

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

          @Dashrender said in RAID for Four Disks:

          Nice post, but as you mentioned, it's a seemingly unnecessary one because of the obviousness of the situation.

          YOu would think, yet it might be the most common RAID situation that I see asked about.

          1 Reply Last reply Reply Quote 0
          • iroalI
            iroal @Dashrender
            last edited by

            @Dashrender said in RAID for Four Disks:

            @iroal said in RAID for Four Disks:

            @scottalanmiller

            Try to explain this to my boss.

            For him Raid 10 does not exist only Raid 5 or 6..

            Is he simply unaware that RAID 10 exists?

            He never had a problem with Raid 5/6 so why to change.

            DashrenderD scottalanmillerS 3 Replies Last reply Reply Quote 0
            • DashrenderD
              Dashrender @iroal
              last edited by

              @iroal said in RAID for Four Disks:

              @Dashrender said in RAID for Four Disks:

              @iroal said in RAID for Four Disks:

              @scottalanmiller

              Try to explain this to my boss.

              For him Raid 10 does not exist only Raid 5 or 6..

              Is he simply unaware that RAID 10 exists?

              He never had a problem with Raid 5/6 so why to change.

              I take it he didn't have large HDD RAID 5 arrays? then see a resilver fail due to URE or a second drive failure?

              But like you boss, I've also never had an issue with RAID 5, and I've never used a RAID 6. Until I joined SW, I didn't realize the need to move away from RAID 5 due to mathematics for URE chances. Understanding this shows that the reasons for using RAID 5, single drive failure survival, is not longer valid. So we must move to RAID 6 or 7 or 10 to gain that drive failure situation at or better than we had at RAID 5.

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

                @iroal said in RAID for Four Disks:

                @Dashrender said in RAID for Four Disks:

                @iroal said in RAID for Four Disks:

                @scottalanmiller

                Try to explain this to my boss.

                For him Raid 10 does not exist only Raid 5 or 6..

                Is he simply unaware that RAID 10 exists?

                He never had a problem with Raid 5/6 so why to change.

                I keep trying to reach for things he might never have had a problem with, but upgrade/changed anyhow, but for each example I think of failures/reasons that the upgrade happened. But the problem with that is that from what you've said the boss himself never experienced a problem. This is just one of those things you need to understand the math and the reason for doing what you were doing before. If he doesn't agree with those things, well, then there's a total lack of understanding either by you or by him, and until you're on the same page, there won't be an agreement.

                Question - what was his reasoning for doing RAID 5/6 in the first place? and why did he start using RAID 6 instead of 5? what a waste of a drive, right?

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

                  @iroal said in RAID for Four Disks:

                  @Dashrender said in RAID for Four Disks:

                  @iroal said in RAID for Four Disks:

                  @scottalanmiller

                  Try to explain this to my boss.

                  For him Raid 10 does not exist only Raid 5 or 6..

                  Is he simply unaware that RAID 10 exists?

                  He never had a problem with Raid 5/6 so why to change.

                  Redefine "problem" for him. I'd say he's had lots of problems. Ask if "risking the business for no reason" is a problem 😉

                  1 Reply Last reply Reply Quote 0
                  • black3dynamiteB
                    black3dynamite
                    last edited by

                    Is most of the confusion about RAID happens a lot more when using it has VM storage?

                    DashrenderD scottalanmillerS 2 Replies Last reply Reply Quote 0
                    • DashrenderD
                      Dashrender @black3dynamite
                      last edited by

                      @black3dynamite said in RAID for Four Disks:

                      Is most of the confusion about RAID happens a lot more when using it has VM storage?

                      Why would that matter? If anything, from the VM point of view life just gets super easy - don't care about storage, it's not it's job to worry about anymore. The underlying host manages that.

                      But the underlying principles of what storage to use still exist. As I'm trying to keep more forward in my thinking there are many options, and you need to pick the correct one.

                      1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller @black3dynamite
                        last edited by

                        @black3dynamite said in RAID for Four Disks:

                        Is most of the confusion about RAID happens a lot more when using it has VM storage?

                        That appears to be the case. Virtualization and RAID seem to just universally confuse, I suppose.

                        1 Reply Last reply Reply Quote 0
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