Building Out XenServer 6.5 with USB Boot and Software RAID 10

[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.

[scottalanmiller]

See what -f2 does.

[scottalanmiller]

I refreshed the OP with the latest revisions.

[Romo]

[DustinB3403]

Romo can you confirm if SDA is the USB drive?

we need to confirm that it's not attempting to be added to the Array with

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

[Romo]

Yes in my setup sda simulates to be the usb, thats why the array starts with sdb

[DustinB3403]

OK so scott change the script to start at sd[b-e]

[Romo]

I believe it should be in this order:

modprobe raid10
chmod a+x /etc/sysconfig/modules/raid.modules
mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[a-d]
cat /proc/mdstat

[DustinB3403]

@Romo

You mean

mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[b-e]

Need to be very certain we aren't attempting to overwrite the OS USB

[Romo]

We should also add that he needs to finish the array building before trying to add the filesystem

watch cat /proc/mdstat to see it build in real time

And also @scottalanmiller i only get mkfs.cramfs mkfs.ext2 and mkfs.ext3 as available fs by default

[Romo]

@DustinB3403 said:

@Romo

You mean

mdadm --create /dev/md0 --level=10 --raid-devices=4 /dev/sd[b-e]

Need to be very certain we aren't attempting to overwrite the OS USB

Yes, sorry I just copied the OP to show the order. The array needs to start with sdb, sda is the usb

[Romo]

Thats the screenshot of the array detail as you can see the array goes from sd[b-e]

[DustinB3403]

OK Well I've directed him to this topic here, and given him the information he'll need to build the array, following the updated OP.

Lets see how it goes.

[Romo]

Don't believe it was quite ready for him yet. At least not from only looking at the OP of this thread. @scottalanmiller hasn't yet changed several things from there

[DustinB3403]

Is mkfs.xfs not included in XenServer 6.5?

with mkfs -help I get mkfs.ext2

[Romo]

No it is not there by default best option would be mkfs.ext3

[Romo]

options found by default