Building Out XenServer 6.5 with USB Boot and Software RAID 10
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@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.
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i'm going to have to try this out, i have an old dell with FAKERAID.
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This is the output @scottalanmiller just have to replace : with -
UUID : fba59a9c:7e6db5a2:d21e4034:3b415cfd
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@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.
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echo "modprobe raid10" > /etc/sysconfig/modules/raid.modules
modprobe raid10
chmod a+x /etc/sysconfig/modules/raid.modulesmdadm --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
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@romo can you confirm if this command works?
madadm --detail /dev/md10 | grep UUID | cut -d' ' -f3 -
I got a blank output after fixing madadm to mdadm
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It worked on the output that you gave to me.
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See what -f2 does.
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I refreshed the OP with the latest revisions.
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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] -
Yes in my setup sda simulates to be the usb, thats why the array starts with sdb
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OK so scott change the script to start at sd[b-e]
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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 -
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
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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
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@DustinB3403 said:
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
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Thats the screenshot of the array detail as you can see the array goes from sd[b-e]
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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.
