[CentOS] CentOS 6.0 CR mdadm-3.2.2 breaks Intel BIOS RAID

Sun Oct 9 00:23:08 UTC 2011
Ljubomir Ljubojevic <office at plnet.rs>

Vreme: 10/09/2011 12:16 AM, Trey Dockendorf piše:
> On Sat, Oct 8, 2011 at 4:31 PM, William Warren<
> hescominsoon at emmanuelcomputerconsulting.com>  wrote:

>> why bother with bios FAKERAID using PIO mode(effectively).  Make a
>> backup and redo using MD raid and turn off the bios raid. Then things
>> will work correctly.

> I did the downgrade it it worked fine after.

I just now realized that you have fakeraid (dmraid). That is very 
dangerous, because if MB dies, you might need to find another one with 
same chipset to make it work. On the other hand, Linux software RAID 
(mdadm). That way your RAID will work on any MB.

So I also recommend William Warren's suggestion to convert as soon as 
possible. You can even use "RAID 10 - far" to gain 2 x read and 1 x 
write speed of normal disk while mirroring.


Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe

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