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    PERC H730P Mini - Multiple LV's

    IT Discussion
    lvm raid perc h730 raid controller hardware raid storage
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    • DustinB3403D
      DustinB3403 @Dashrender
      last edited by

      @Dashrender said in PERC H730P Mini - Multiple LV's:

      @DustinB3403 said in PERC H730P Mini - Multiple LV's:

      The entire scope changed again, boss would like to now install to a class 10 SD card.

      So once I have that (64Gb or greater) than I can install XS7 to the hosts.

      Eh? How did he get involved in the decision making process?

      Have to have a conversation with people who make the decision. Have to converse with people.

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

        OK, my solution for this on a XS7 install, to the local drive:

        install XS7 to the local disk (RAID or single disk, test only) We assume you are installing to /dev/sda
        Use XC or SSH to XS Dom0 log in as root

         parted /dev/sda unit s print free
        

        This command will output something like this.
        https://i.imgur.com/RdeCbdD.png

        You see the free space in the last row, you'll need the starting and ending numbers.

         parted /dev/sda mkpart ext2 8703385s  976773134s
        

        https://i.imgur.com/gieTSvf.png

         parted print free
        

        You should see something like this
        https://i.imgur.com/ajTgk4W.png

        You'll notice that our new partition is number 4 aka /dev/sda4

        to get the XS UUID run

        xe host-list
        

        You'll see something like this
        https://i.imgur.com/JNBmml9.png

        You'll use the UUID in the next command.

        Now to add this new partition to XS as a SR.

        xe sr-create host-uuid=80a90bd4-646b-4b41-a6f3-31fc0795f720 content-type=user name-label="Local Storage" shared=false device-config:device=/dev/sda4 type=lvm
        

        With output like this.
        https://i.imgur.com/48o6tL3.png

        now if you look in XC, you should see that you have a SR called Local Storage.
        https://i.imgur.com/68Lp4Qj.png

        DashrenderD 1 Reply Last reply Reply Quote 2
        • DashrenderD
          Dashrender @Dashrender
          last edited by

          @Dashrender said in PERC H730P Mini - Multiple LV's:

          You see the free space in the last row, you'll need the starting and ending numbers.

           parted /dev/sda mkpart ext2 8703385s  976773134s
          

          There will be no output, you just return to a prompt

          So moving to Dustin's actual situation, he has a 14TB OBR10 - I don't know if XS will allow ext2 on a partition that large. We'll try it first, it might fail. If so, we'll try ext4

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

            @travisdh1
            This thread.

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

              @Dashrender said in PERC H730P Mini - Multiple LV's:

              @travisdh1
              This thread.

              Yeah, looks like a good procedure.

              1 Reply Last reply Reply Quote 0
              • momurdaM
                momurda
                last edited by

                ext2 and ext3 don't know anything over the existence of 2TB, but you can use type lvm to do this locally(looks like you have done this). If XS doesn't have support for ext4 natively I don't think you can use ext4 file systems for anything in XS.
                ext4 would work if you can mount it as an ext type SR in XS, but you probably cant, and will have to use lvm type locally for large SR
                If you want thin provisioning on large shared SRs, use NFS instead of iscsi.

                This was all in that Xenserver book I just got and read through.

                There is also The Tobias reply to this topic
                http://discussions.citrix.com/topic/373709-adding-storage-to-xenserver/

                This Xenserver 7 blog that states why ext4 support is missing in XS 7 (although it is coming in the future)
                https://www.citrix.com/blogs/2016/06/30/xenserver-7-building-the-foundations-of-a-great-future/

                You may be wondering why the move to CentOS 7 didn’t automatically mean that XenServer 7 acquired various features and mechanisms that CentOS 7 happens to have, such as SELinux or the XFS filesystem. This is because the domain 0 Linux platform is a component of the XenServer system (rather than XenServer being an application that runs on top of Linux) and is therefore tightly integrated into the overall system – when we upgrade components of the system our first priority is to ensure a like-for-like upgrade which preserves the integrity, functionality, quality, performance and security of the system. If the new component comes with new mechanisms that didn’t exist in the older version, we carefully consider if and how we can integrate those new mechanisms into the XenServer system (for example moving from ext3 to XFS would require careful consideration for XenServer upgrade and rollback use-cases and therefore isn’t a transparent change) – these additional integrations may come in later releases than the underlying component upgrade.

                BRRABillB stacksofplatesS 2 Replies Last reply Reply Quote 0
                • BRRABillB
                  BRRABill @momurda
                  last edited by

                  @momurda said

                  This was all in that Xenserver book I just got and read through.

                  What book was that?

                  DustinB3403D momurdaM 2 Replies Last reply Reply Quote 0
                  • DustinB3403D
                    DustinB3403 @BRRABill
                    last edited by

                    @BRRABill I believe it's the XenServer Practical Guides and Tips book . . .

                    1 Reply Last reply Reply Quote 0
                    • momurdaM
                      momurda @BRRABill
                      last edited by

                      @BRRABill
                      • XenServer Administration Handbook: Practical Recipes for Successful Deployments

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

                        Ha. . . . .

                        So everyone get ready for a kicker.

                        Did a 6.5 install to a 16GB usb with the same OBR10 array (15TB) and selected it as the default SR during installation.

                        And I now have a Local SR of 15TB on an XS6.5 installation, with no additional configuration....

                        Um WTF did we all do wrong before?

                        momurdaM 1 Reply Last reply Reply Quote 1
                        • momurdaM
                          momurda @DustinB3403
                          last edited by

                          @DustinB3403
                          You were trying to use ext type for thin provisioning rather than the default for large SR of type lvm

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

                            @momurda said in PERC H730P Mini - Multiple LV's:

                            @DustinB3403
                            You were trying to use ext type for thin provisioning rather than the default for large SR of type lvm

                            You'd think, but I went through this not to long ago, and I specifically didn't choose thin provisioning to test and had to add the SR manually.

                            1 Reply Last reply Reply Quote 0
                            • momurdaM
                              momurda
                              last edited by

                              Yes I remember, but it did work as type lvm eventually. Not sure why it didn't on install, ive not had a problem with it yet myself.
                              Also, is there a 'Guided using entire disk with lvm' option in XS installer?(I cant remember) perhaps that option is where the magic happens. Without it maybe you have to add the large SR manually.

                              1 Reply Last reply Reply Quote 0
                              • stacksofplatesS
                                stacksofplates @momurda
                                last edited by stacksofplates

                                @momurda said in PERC H730P Mini - Multiple LV's:

                                ext2 and ext3 don't know anything over the existence of 2TB, but you can use type lvm to do this locally(looks like you have done this). If XS doesn't have support for ext4 natively I don't think you can use ext4 file systems for anything in XS.
                                ext4 would work if you can mount it as an ext type SR in XS, but you probably cant, and will have to use lvm type locally for large SR
                                If you want thin provisioning on large shared SRs, use NFS instead of iscsi.

                                This was all in that Xenserver book I just got and read through.

                                There is also The Tobias reply to this topic
                                http://discussions.citrix.com/topic/373709-adding-storage-to-xenserver/

                                This Xenserver 7 blog that states why ext4 support is missing in XS 7 (although it is coming in the future)
                                https://www.citrix.com/blogs/2016/06/30/xenserver-7-building-the-foundations-of-a-great-future/

                                You may be wondering why the move to CentOS 7 didn’t automatically mean that XenServer 7 acquired various features and mechanisms that CentOS 7 happens to have, such as SELinux or the XFS filesystem. This is because the domain 0 Linux platform is a component of the XenServer system (rather than XenServer being an application that runs on top of Linux) and is therefore tightly integrated into the overall system – when we upgrade components of the system our first priority is to ensure a like-for-like upgrade which preserves the integrity, functionality, quality, performance and security of the system. If the new component comes with new mechanisms that didn’t exist in the older version, we carefully consider if and how we can integrate those new mechanisms into the XenServer system (for example moving from ext3 to XFS would require careful consideration for XenServer upgrade and rollback use-cases and therefore isn’t a transparent change) – these additional integrations may come in later releases than the underlying component upgrade.

                                That's ridiculous. Id much rather have SELinux, XFS, and other advancements over backwards/forward compatibility. Give people real V2V tools and with that and xva's backwards/forward compatibility won't matter.

                                1 Reply Last reply Reply Quote 1
                                • momurdaM
                                  momurda
                                  last edited by

                                  Hey, I'm just italicizing what XS blog guy said.

                                  stacksofplatesS 1 Reply Last reply Reply Quote 1
                                  • stacksofplatesS
                                    stacksofplates @momurda
                                    last edited by

                                    @momurda said in PERC H730P Mini - Multiple LV's:

                                    Hey, I'm just italicizing what XS blog guy said.

                                    I know. Sorry on my phone and didn't feel like trying to quote just his quote.

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

                                      What are XVAs?

                                      stacksofplatesS 1 Reply Last reply Reply Quote 0
                                      • momurdaM
                                        momurda
                                        last edited by momurda

                                        Xen Virtual Appliance file. I think it is just a container for ovf types.
                                        edit: it is a container for ova types, which are containers for ovf types.

                                        1 Reply Last reply Reply Quote 0
                                        • stacksofplatesS
                                          stacksofplates @Dashrender
                                          last edited by

                                          @Dashrender said in PERC H730P Mini - Multiple LV's:

                                          What are XVAs?

                                          Its the format that XenServer exports snapshots to. Some compressed format that has to be stitched back together to get a usable disk out of it. So the only way to export from XenServer to something else is to uncompress the file and untar it. Then stitch all of the files back together.

                                          1 Reply Last reply Reply Quote 1
                                          • T
                                            Texkonc
                                            last edited by

                                            I thought you were the Xen god?
                                            I heard you knock on doors to spread the gospel.

                                            stacksofplatesS 1 Reply Last reply Reply Quote 1
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