[CentOS] Booting Software RAID

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On 01/24/2014 09:25 AM, Matt wrote:
> # file -s /dev/sda
> /dev/sda: x86 boot sector; GRand Unified Bootloader, stage1 version
> 0x3, boot drive 0x80, 1st sector stage2 0x849fc, GRUB version 0.94;
> partition 1: ID=0xee, starthead 0, startsector 1, 4294967295 sectors,
> extended partition table (last)\011, code offset 0x48
>
> # file -s /dev/sdb
> /dev/sdb: x86 boot sector; GRand Unified Bootloader, stage1 version
> 0x3, boot drive 0x80, 1st sector stage2 0x849fc, GRUB version 0.94;
> partition 1: ID=0xee, starthead 0, startsector 1, 4294967295 sectors,
> extended partition table (last)\011, code offset 0x48
>
> I am guessing this is saying its present on both?  I did nothing to
> copy it there so it must have done it during the centos 6.x install
> process.

It would appear so. But I'd recommend simply yanking out one drive, 
booting, and then swapping the drives to try booting again. You can 
resync the raid arrays trivially after the test. Then you know for sure. 
I've made this a matter of course for any servers where the root fs is 
RAID0.

-Ben