The sr raid set is on a separate intel raid adapter with separate sas drives. To learn more and to read the entire article at its source, please refer to the following page, configure xenserver 5. This document describes how to install xenserver 6. Does anyone have handson experience to share with regards to software raid performance under xenserver 5. Ill have 4 disks and want two raid 1 pools, one for the os and one for storage. The following commands are dependent on your installation. After following your tutorial including the adjustment pointed out by ilja, i have a successful install of xen w software raid 1. Adding software raid support to esxi would take a good deal of work theres a lot of kernel support that would need to be added, plus quite a few userspace utilities. How to configure raid 5 after installing xenserver 7. A problem i have encountered is that the xenserver 5. All the processing is done by your cpu and is similar to software raid in that regard.
Besides that, the linux emulation layer in esxi loads after vmkernel, which raises questions as to whether you could actually get esxi booted correctly with a software raid. Sep 14, 2009 xenserver doesnt really support fakeraid or software raid. Sep 20, 2016 xenserver 7 and software raid configuration. I recently did some performance tests for a couple virtualization technologies. Hi all, i try create a raid1 with mdadm after install, but i dont get it work. Then 2nd thing i would like to do is to examine the possibility of using linux software raid on it as i cannot do this under vmware esxi which support only hardware raid controller. Well, yes, mdadm allows to build software raid from different, nonidentical hard drives. Driver disk for hp smart array raid controller hpsa v3. Due to the fact that the standard update is a xenserver installation of the new xenserver with virtual machines preservation, with the loss of all the changes that were made manually on the server installed software, changing adding settings through the console, etc. This is a hotfix for customers running xenserver 6. Storage repository on software raid although citrix recommends against using software raid with xenserver due to performance issues, ive had some pretty awful experiences with hardware raid cards over the last few years. I found that this is quite easy to do which therere a no. Weve always had performance issues with our xenserver 5.
It is also called intelligent raid on chip iroc or software raid and it is built into. Historically xenserver does not support software raid outthebox, and this is unchanged in the latest 6. The disk io performance loss in xen vms xenserver 5. If the initrd is then regenerated for example, by installing a hotfix, xenserver. When i go to install xenserver it ask which disk i want to install the xenserver on and it list all 4 of my harddrives instead of showing the raid 5 as one disk. Xenserver doesnt really support fakeraid or software raid. Sas 5 ir integrated raid controller device id 1f07 sas. Xenserver 7 raid1 mdadm after install running system. Citrix have released a major release of their hypervisor xenserver 6.
Creation of multiple independent virtual systems from one physical server. Yes, either an intel vt or amdv 64bit x86based system with one or more cpus is required to run all. Md raid provides enterprise software raid 0, 1, 5, 6 and 10. Jul 29, 2015 the alternative to this problem is configuring the system in software raid1. I have with this blogpost gathered all the public informations available and created a blogpost on what i think is new with citrix xenserver 6. So to conclude the original query, there is no way to get xenserver 6.
This description worked for us by part it is still work in progress. Xenserver has centos in the dom0, centos has one of the best raid systems in the industry built in its called md raid, its great but not as good as zfs for example, but still one of the best and used by many nas and san devices. These steps are only used if performing an upgrade to an older version of xenserver. Sas 5 ir integrated raid controller device id 1f08 sas. I got one more problem i have built a raid1 on over to disks on a dell s software raid controller. A xen project domain or any unix host for that matter could create a filesystem on an evmsmanaged volume created from a region of an lvm2 container whose storage regions are each software raid devices created. Software raid 1 is not that bad and wont slow your server down much. We need to install too, but at this time we are stucked on raid software, mdadm configuration. Storage controllers citrix hypervisor hcl xenserver.
Solved raid monitoring in xenserver 7 virtualization. Citrix hypervisor is the leading open source virtualization platform, powered by the xen hypervisor. I did my first test install of xenserver and first thing i notice is that it didnt see my. To workaround this issue i suggest doing the following. It involves either doing a driver disc which needs to be created through an. Linux software raid is damn good and it beats low end raid controllers and usually matches performance of midend ones. I have been struggling to get the intel raid rs2wg160 with xenserver 6. Xenserver 7 raid1 mdadm after install running system server.
Does anyone have a document i can read or point me into the correct direction to help me to convert my current drive to a raid 5. Obviously, i dont have raid and i was wondering whether it would have an effect on the vm disk readwrite speed if i increase the number of drives as local sr. It is used in the worlds largest clouds and enterprises. Xenserver 7 and software raid configuration howtoforge. Poor techies like unable to afford a hardware raid controller for a simple test box. We have been planning to upgrade our citrix xenserver from 5. But after researching more i found out that citrix xenserver does not support software raid either, out of the box. With these steps a virtualizaton platform must be established using xenserver 6. The benefits that come with setting this configuration are. 4 device dev sdf1 raiddisk 5 device devsdg1 raiddisk 6. Solved how to configure raid 5 after installing xenserver 7. Would quite like to get the rest of the servers onto 7. First, a minimal os with gpt debian or ubuntu is installed on the server. Finding almost no concise guide to doing this online and trying to help someone go through this in the simplest manner possible, i thought that it would be good to document the process as we typically dont see xenserver with software raid and when you find guides for that they assume that you are booting from the software raid array as well which adds a lot of unnecessary complication.
Basically after that we have setup the raid, following that thread its look that there is no official documentation. Finding almost no concise guide to doing this online and trying to help someone go through this in the simplest manner possible, i thought that it would be good to document the process as we typically dont see xenserver with software raid and when you fi. But from my own expertise, building software raid off different hard drives will sooner or later bite you. Also this configuration boots off of the raid device. Proxmox makes it easy to set up your disks in raid during setup i was planning on using zfs but it looks like i should probably avoid that on xcp for now, and i know that 7.
You must copy the start and end sectors from devsda, but in practice, for xenserver checked on 6. Sep 02, 2011 a problem i have encountered is that the xenserver 5. I eventually ran in to problems with my sr on fakeraid. That will be many hundreds of dollars and no faster than software raid. To make this work, you need to drives in your system. This updated driver includes the following improvements. Installing the os on a new vm systems management dell openmanage systems management software suite is a suite of system management applications for managing dell systems. Afterwards you can log in and record the network configuration etc networkinginterfaces. Aug 19, 2015 this guide is going to walk through installing the xenserver 6. I made a script that automates the process for xen 6. I used the notes from some guy on the citrix forums. I understand that the drivers for said raid card should be. Xenserver only permits upgrades from the last major release.
Although citrix recommends against using software raid with xenserver due to performance issues, ive had some pretty awful experiences. Sr on fakeraid onboard intel raid and tape drive trough iscsi to windows vm posted by stan gobien on 22092008 leave a comment 6 go to comments edit. First we set up the 2nd disk by copying the partition tables whilst enabling a degraded raid on it, then copy data over with custom initrd. However their xenserver 7 install is hard raid only but its 7. I wish that i had his name so i could give him credit but its not here on the stuff i printed out. I prefer to build software raid always on identical hard drives, which makes things much more predictable.
This security hotfix addresses the vulnerabilities as described in the security bulletin above. Short tags support for new 2011 smart array controllers. The installation media will locate older versions of xenserver if the user wishes. A xen project domain or any unix host for that matter could create a filesystem on an evmsmanaged volume created from a region of an lvm2 container whose storage regions are each software raid devices created from network block devices exported from other hosts. Citrix hypervisor open source server virtualization. In the following we describe how to use xen virtualisation for quattor managed grid middleware glite servers. On the steps to follow, devsda are used for the disc where the instalation was made and devsdb for the second disc with the same size. So as long as at least one of your disks are good, the system should boot. If a disk has a software raid signature, the xenserver activates it during boot.
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