PERC H730P Mini - Multiple LV's
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So I'm trying to create 2 Logical Volumes on a single OBR10 which consumes all drives in my server, and I thought I had this figured out, but am now questioning if I had it correct based on previous research.
The goal is to have a single OBR10 with 2 logical volumes on the array, so any guidance in figuring this out is welcome.
Just not seeing the option. . . . maybe I'm to tired today.
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I wonder if I should just install XS7 to the OBR10, let it create the LV's and then attach the storage. . .
Hrm. . .
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If your RAID controller doesn't support this (and if it's the same one we looked at before, it doesn't) then you will have to do this in software.
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Last I knew, and this has come up a lot recently so I'm pretty sure, the PERC H730 does not have an LVM layer and cannot make volumes.
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Right, so we are solving this by installing XS7 and during install choosing no SR location.
Then once inside XS7, creating a LVM logical volume that can then be used to mount a SR into.
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The problem is, neither of us know how to do that.. still looking.
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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.
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@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?
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@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.
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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 rootparted /dev/sda unit s print freeThis command will output something like this.
https://i.imgur.com/RdeCbdD.pngYou see the free space in the last row, you'll need the starting and ending numbers.
parted /dev/sda mkpart ext2 8703385s 976773134shttps://i.imgur.com/gieTSvf.png
parted print freeYou should see something like this
https://i.imgur.com/ajTgk4W.pngYou'll notice that our new partition is number 4 aka /dev/sda4
to get the XS UUID run
xe host-listYou'll see something like this
https://i.imgur.com/JNBmml9.pngYou'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=lvmWith output like this.
https://i.imgur.com/48o6tL3.pngnow if you look in XC, you should see that you have a SR called Local Storage.
https://i.imgur.com/68Lp4Qj.png -
@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 976773134sThere 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
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@travisdh1
This thread. -
@Dashrender said in PERC H730P Mini - Multiple LV's:
@travisdh1
This thread.Yeah, looks like a good procedure.
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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.
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@BRRABill I believe it's the XenServer Practical Guides and Tips book . . .
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@BRRABill
• XenServer Administration Handbook: Practical Recipes for Successful Deployments -
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?
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@DustinB3403
You were trying to use ext type for thin provisioning rather than the default for large SR of type lvm -
@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 lvmYou'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.
