Building Out XenServer 6.5 with USB Boot and Software RAID 10

[Romo]

@DustinB3403 sorry I did add content-type=user to the sr-create command. The final command was

xe sr-create type=ext device-config:device=/dev/md10 shared=false host-uuid:fba59a9c-7e6db5a2-d21e4034-3b415cfd content-type=user name-label="Array storage"

[DustinB3403]

OK so after saving the RAID Array (in my wall of text) he then would have to run

umount /dev/raid10

and then

xe sr-create type=ext device-config:device=/dev/raid10 shared=false host-uuid:<HOST-UUID> content-type=user name-label="Array storage"

[DustinB3403]

I'm guessing the system auto-mounted the array when you built it, and can now see it in XenCenter.

Correct?

[Romo]

It is automounting since we added it to our fstab

[Romo]

After adding the array as storage xenserver , the output of df -Th changes to this

[Romo]

I removed the /dev/md10 entry from fstab so it doesn't automount and causes conflict with xenserver handling storage

[Romo]

Xencenter after reboots properly automounts our new array

[scottalanmiller]

We need to get the UUID out of the proposed script, that much I know won't work.

[scottalanmiller]

@Romo said:

I removed the /dev/md10 entry from fstab so it doesn't automount and causes conflict with xenserver handling storage

Ah, good catch. I'm updating the OP with a finalized script. Please review.

[Romo]

I got the uuid using this:

madadm --detail /dev/md10 | grep UUID

[Romo]

We don't need to install mdadm, its there already

[scottalanmiller]

@Romo said:

I got the uuid using this:

madadm --detail /dev/md10 | grep UUID

Thanks.

[scottalanmiller]

@Romo said:

I got the uuid using this:

madadm --detail /dev/md10 | grep UUID

What is the raw output of that command? Did you need to clean it up? I want this scripted, not manual, if possible.

[brianlittlejohn]

i'm going to have to try this out, i have an old dell with FAKERAID.

[Romo]

This is the output @scottalanmiller just have to replace : with -

UUID : fba59a9c:7e6db5a2:d21e4034:3b415cfd

[mlnews]

@brianlittlejohn said:

i'm going to have to try this out, i have an old dell with FAKERAID.

You can do it anywhere. No FakeRAID needed since the whole point is to bypass it. Works equally well where there is no FakeRAID too.

[Romo]

echo "modprobe raid10" > /etc/sysconfig/modules/raid.modules
modprobe raid10
chmod a+x /etc/sysconfig/modules/raid.modules

mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]

Loading the modules to kernel need to go before creating the md device

[scottalanmiller]

@romo can you confirm if this command works?

madadm --detail /dev/md10 | grep UUID | cut -d' ' -f3

[Romo]

I got a blank output after fixing madadm to mdadm

[scottalanmiller]

It worked on the output that you gave to me.