RHEL4 and Disk Druid inconsistencies

[Greg Golin]

Create your md devices by hand, its easy. Look at the software raid
howto online. [I've been busy with the same task as you are :)]

GG

On 10/27/05, Sean Hawthorne <shawthorne at roam-it.com> wrote:
> Hello All,
>
> I've been trying my darnedest  to build a pair of clustered servers this
> week. I have been though the RHEL4 install on all four machines. All of
> which are the exact same hardware. One thing that is driving me nuts
> though is Disk Druid. I have been very careful about building all my
> partitions exactly the same (same order and sizes, etc....), yet I keep
> getting different results. i.e.
>
> I'll slice both hard drives like so:
>
> sda1     200MB     software raid
> sda2     2000MB   software raid
> sda3     6000MB   software raid
> sda4     extended partition
> sda5     232800MB     software raid
>
> All the cluster sizes match and everything. All seems good. Then I start
> making the RAID sets. Some times I'll end up with this:
>
> md0 200MB /boot
> md1 6000MB /
> md2 2000MB swap
> md3 232800MB /data
>
> other times I'll end up with this (or something else completely).
>
> md0 2000MB swap
> md1 6000MB /
> md2 232800MB /data
> md3 200MB /boot
>
> There doesn't seem to be any consistency in how disk druid orders the md
> devices when they are created. While not 100% necessary to have the
> clusters all setup exactly the same, it certainly does make
> administering them easier if I don't have to deal with nuances like this.
>
> So, my questions:
>
> 1) Can anyone tell me how to repeatably get the same results from disk
> druid each time, or why it does this?
> 2) Is there any way to reorder the md devices once the system is
> installed? What do I need to change/look for?
>
> --
> Sean Hawthorne
> Roam IT Technical Professional
> Email: shawthorne at roam-it.com
>
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