[CentOS] CentOS 6.2 software raid 10 with LVM - Need help with degraded drive and only one MBR

Sat Mar 3 05:35:54 UTC 2012
Jonathan Vomacka <juvix88 at gmail.com>

On 3/2/2012 9:34 AM, m.roth at 5-cent.us wrote:
> Jonathan Vomacka wrote:
>> CentOS Community,
>> I have a dedicated server with 4 hard drives in a RAID 10 software
>> configuration running LVM. My OS is CentOS 6.2. Earlier today, I
>> rebooted my system and my system did not come back online. I opened a
>> ticket with my datacenter who informed me that one of my hard drives is
>> no longer recognized by the bios and has failed. I was told that an OS
>> reinstall was needed.
>> I don't understand why a reinstall would be necessary when the drives
>> are in RAID 10. Apparently when the datacenter did the initial OS
>> install, they ONLY installed the MBR on one drive instead of all 4
>> leaving the other 3 drives unbootable.
> <snip>
> Whatever the outcome, I would strongly recommend escalating this to a
> manager, since the staff installed it incorrectly - perhaps they don't
> understand what a RAID is? But they need to make this right - you're
> paying for it.
> Besides, it's not Windows....
>           mark
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Mark Roth,

I escalated to the DC manager and this is what he replied:

"I'm sorry your having a hard time with software raid on your server and 
our install process. From what I remember talking with out techs long 
ago about this is, that when using raid10 and software raid, the 
bootloader cannot be installed on the software raid partition and has to 
be on a single drive. I am not 100% sure on this, and will confirm with 
my tech later tonight and to see what can be done to correct your issue."