Re: LSI MegaRAID SAS 9240-4i hangs system at boot
On 6/13/2012 1:04 PM, Ramon Hofer wrote:
> On Tue, 12 Jun 2012 18:35:57 -0500
> Stan Hoeppner <stan@hardwarefreak.com> wrote:
>
>>> Hmm, probably I have to create a raid5 with the four empty 2 TB
>>> disks attached to the LSI. Then:
>>>
>>> ~$ mdadm -C /dev/md0 -n1 -l linear /dev/md1
>>
>> WTF?
>
> I also had to add --force to create the array with one raid5.
>
>
>>> Now I copy the content from the old raid5 with the four 1.5 TB
>>> disks to the new linear md0.
>>
>> Shuffleboard... You didn't previously make clear that not all 8 disks
>> were freely available to build your stack from the ground up. The
>> instructions I gave you assumed that all 8 drives were clean. Now
>> you're attempting to modify the precise instructions I gave you and
>> play shuffleboard with your data and disks, attempting to migrate on
>> the fly.
>
> Sorry, I wrote this too in another thread :-(
> I like taking some risk :-)
>
> But since the old raid isn't written only read I didn't fear to loose
> the data.
No, no, no risk of losing the data. The problem is with the resulting
XFS AG layout you got from this procedure, as I mentioned in the other
reply. Everything will still work, assuming mdadm will allow you to add
another array after having to use --force to create the linear. I've
never tried creating a linear array with one device before. If that
works, and the xfs grow works, you should be ok, just with less performance.
>
>> This may not have a good outcome. I guess you feel that you
>> understand this stuff and are confident in your ability at this point
>> to effect the outcome you desire. If things break badly, I'll try to
>> assist, but I make no promises WRT outcomes nor guarantee my
>> availability.
>
> I wanted to finally do something ;-)
I was being a bit dramatic there, frustration showing I guess. ;) Like
I said, should be ok, if mdadm doesn't puke adding the other array in.
--
Stan
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