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    CentOS 7 Configure MD OBR10 before installation

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    software raidcentosssd
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    • DustinB3403D
      DustinB3403
      last edited by

      And now the next issue. . .

      Of course I have 3 matching SSD's of 500 GB each, and the 4th is of course 1TB. And I don't want to wast the space. lol

      travisdh1T 1 Reply Last reply Reply Quote 0
      • travisdh1T
        travisdh1 @DustinB3403
        last edited by

        @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

        And now the next issue. . .

        Of course I have 3 matching SSD's of 500 GB each, and the 4th is of course 1TB. And I don't want to wast the space. lol

        You'll have to create a 500GB partition on the 1TB one then. Mark that partition as a RAID device. Partition and mount the rest of the 1TB as you wish.

        DustinB3403D 1 Reply Last reply Reply Quote 0
        • JaredBuschJ
          JaredBusch
          last edited by JaredBusch

          Or better yet, just use the three 500GB in a RAID5. I mean we are talking SSD here. You still get the 1TB space that you would get from the 4x 500GB in RAID 10

          DustinB3403D 2 Replies Last reply Reply Quote 3
          • DustinB3403D
            DustinB3403 @JaredBusch
            last edited by

            @jaredbusch but I don't get the IOPS, which for the operation that this system is being setup for is most critical component.

            JaredBuschJ 1 Reply Last reply Reply Quote 0
            • DustinB3403D
              DustinB3403 @JaredBusch
              last edited by

              @jaredbusch usually I would agree.

              1 Reply Last reply Reply Quote 0
              • DustinB3403D
                DustinB3403 @travisdh1
                last edited by

                @travisdh1 said in CentOS 7 Configure MD OBR10 before installation:

                @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                And now the next issue. . .

                Of course I have 3 matching SSD's of 500 GB each, and the 4th is of course 1TB. And I don't want to wast the space. lol

                You'll have to create a 500GB partition on the 1TB one then. Mark that partition as a RAID device. Partition and mount the rest of the 1TB as you wish.

                Crisis averted. I found another 500GB!

                1 Reply Last reply Reply Quote 2
                • JaredBuschJ
                  JaredBusch @DustinB3403
                  last edited by

                  @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                  @jaredbusch but I don't get the IOPS, which for the operation that this system is being setup for is most critical component.

                  I cannot imagine a general workload that would saturate this.

                  So what kind of workload do you have?

                  DustinB3403D 1 Reply Last reply Reply Quote 1
                  • DustinB3403D
                    DustinB3403 @JaredBusch
                    last edited by DustinB3403

                    @jaredbusch said in CentOS 7 Configure MD OBR10 before installation:

                    @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                    @jaredbusch but I don't get the IOPS, which for the operation that this system is being setup for is most critical component.

                    I cannot imagine a general workload that would saturate this.

                    So what kind of workload do you have?

                    4K video and file rendering with massive files (1TB plus). Only running the 1 file at a time to offload from our team.

                    JaredBuschJ 1 Reply Last reply Reply Quote 0
                    • JaredBuschJ
                      JaredBusch @DustinB3403
                      last edited by

                      @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                      @jaredbusch said in CentOS 7 Configure MD OBR10 before installation:

                      @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                      @jaredbusch but I don't get the IOPS, which for the operation that this system is being setup for is most critical component.

                      I cannot imagine a general workload that would saturate this.

                      So what kind of workload do you have?

                      4K video and file rendering with massive files (1TB plus). Only running the 1 file at a time to offload from our team.

                      Yup, definitely not a general workload.

                      I would love to see th IOPS numbers while in use.

                      ObsolesceO 1 Reply Last reply Reply Quote 2
                      • ObsolesceO
                        Obsolesce @JaredBusch
                        last edited by Obsolesce

                        @jaredbusch said in CentOS 7 Configure MD OBR10 before installation:

                        @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                        @jaredbusch said in CentOS 7 Configure MD OBR10 before installation:

                        @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                        @jaredbusch but I don't get the IOPS, which for the operation that this system is being setup for is most critical component.

                        I cannot imagine a general workload that would saturate this.

                        So what kind of workload do you have?

                        4K video and file rendering with massive files (1TB plus). Only running the 1 file at a time to offload from our team.

                        Yup, definitely not a general workload.

                        I would love to see th IOPS numbers while in use.

                        I just got this on a VM on a busy hyper-v host, copying a 7GB file:

                        0_1538777643875_3a7f78bd-0a9c-4251-bbf1-a37305ff56f6-image.png

                        Not impressive, but I wish i still had the screenshots from a long time ago on the host itself. Lots of IOPS.

                        DustinB3403D 1 Reply Last reply Reply Quote 0
                        • DustinB3403D
                          DustinB3403 @Obsolesce
                          last edited by

                          @obsolesce are you using top there?

                          scottalanmillerS 1 Reply Last reply Reply Quote 0
                          • scottalanmillerS
                            scottalanmiller @DustinB3403
                            last edited by

                            @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                            @obsolesce are you using top there?

                            Looks like iostat

                            ObsolesceO 1 Reply Last reply Reply Quote 0
                            • ObsolesceO
                              Obsolesce @scottalanmiller
                              last edited by

                              @scottalanmiller said in CentOS 7 Configure MD OBR10 before installation:

                              @dustinb3403 said in CentOS 7 Configure MD OBR10 before installation:

                              @obsolesce are you using top there?

                              Looks like iostat

                              Yes, iostat

                              1 Reply Last reply Reply Quote 0
                              • Emad RE
                                Emad R @DustinB3403
                                last edited by

                                @dustinb3403

                                Hi,

                                You cant but the /boot as raid

                                However the / or root part can be placed as raid, I did this and I will show you how to do this, but please don't do it.

                                Here where it gets bad.

                                You wish to update the system and kernel and all this can affect the RAID/ now the config for the raid is done in the kernel and stored in boot part, so you always updating this and your always keeping the disks busy, even on network packet level. Everything happens will happen on the /

                                What you want to do is look into purchasing a small reliable drive
                                Like 64 GB or 128 GB NVMe SSD and using that as your /
                                or If that is too fancy or expensive, get USB thumb drive and pair it with samsung SD card and install the root part

                                Then create RAID 10 on the 4 other drives, cause even if the /root fails it wont matter . pop another one and it will auto detect the raid , with cockpit it is very easy to detect the RAID and activate it and mount it

                                4_1538835763447_2018-10-06 17_18_47-Centos Gi (Ansible 2) - VMware Workstation.png 3_1538835763447_2018-10-06 17_18_38-Centos Gi (Ansible 2) - VMware Workstation.png 2_1538835763447_2018-10-06 17_18_33-Centos Gi (Ansible 2) - VMware Workstation.png 1_1538835763447_2018-10-06 17_17_52-Centos Gi (Ansible 2) - VMware Workstation.png 0_1538835763447_2018-10-06 17_17_43-Centos Gi (Ansible 2) - VMware Workstation.png

                                1 Reply Last reply Reply Quote 0
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