[CentOS] Re: Raid5 issues

[Scott Silva]

Ruslan Sivak spake the following on 5/7/2007 9:49 AM:
> Scott Silva wrote:
>> Ruslan Sivak spake the following on 5/5/2007 9:16 AM:
>>  
>>> William Warren wrote:
>>>    
>>>> rus,
>>>>
>>>> This is critical
>>>>
>>>> turn off the raid functions of your bios.  You must do this or the
>>>> fakeraid of the bios WILL interfere with md's ability to perform.
>>>> Then try building the md raid.
>>>>
>>>>
>>>>       
>>> William,
>>>
>>> This might be a bit of a problem.  The computer is quite old, and I had
>>> to get a raid card just to be able to connect sata drives to it.  The
>>> bios boot order only lists the cdrom (I can't even get it to boot from
>>> floppy).  The only way I can get it to boot off these hard drives is if
>>> I have them in some sort of raid set up through the card's bios (even
>>> concatenation works).  Unfortunatelly, with concatenation, if 1 drive
>>> dies, I am forced to recreate the array, which kills things.
>>> I think I need to use the fakeraid driver.  It keeps popping up anyway
>>> with weird error messages.  For example, when there is no raid set up, I
>>> keep getting something like this:
>>>
>>> Error adding sda to set silxxxxxxx: Raid type 234 is not supported.
>>> (This is from memory, so probably not exactly correct).
>>> I tried updating the bios, but I can't even seem to do that.  It won't
>>> boot off the floppy, and when I boot of any dos based cdrom, I can't see
>>> the floppy.  (I have external usb floppy.  The internal one doesn't seem
>>> to work).
>>> Russ
>>>     
>> Can you add each drive as a separate stripe?
>> IE.. 4 drives, 4 arrays, 1 drive per array. I had to do that with an old
>> promise card I used as a controller.
>>
>>   
> William,
> 
> Thanks for the suggestion.  I actually though of the same thing this
> morning, and added the first drive to it's own (concatenated) array. 
> That seemed to work and allow it to boot. I still can't get raid10 to
> work, but I'll start a new thread on that.
> 
> Russ
I don't think you will get raid 10 out of the anaconda installer. I don't
think it is supported yet. So even if the raid 10 driver is in the installer's
initrd, you probably will not get a raid 10 from anaconda.


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