Grub2 MBR issues

[Reindl Harald]

Am 02.05.2012 22:20, schrieb Jeffrey Ross:
> I have a F16 system (which had been upgraded from F15) that is running
> RAID-1 for all volumes.  I have notice that GRUB2 is only on /dev/sda but
> not on /dev/sdb

where do you read this?

> [root at wisdom boot]# file - < /dev/sda
> /dev/stdin: x86 boot sector; partition 1: ID=0xfd, active, starthead 32,
> startsector 2048, 785137 sectors; partition 2: ID=0xfd, starthead 0,
> startsector 787185, 15631245 sectors; partition 3: ID=0xfd, starthead 0,
> startsector 16418430, 8000370 sectors; partition 4: ID=0x5, starthead 254,
> startsector 24418800, 1929101265 sectors, code offset 0x63
> 
> [root at wisdom boot]# file - < /dev/sdb
> /dev/stdin: x86 boot sector; GRand Unified Bootloader, stage1 version 0x3,
> boot drive 0x80, 1st sector stage2 0x842a9; partition 1: ID=0xfd, active,
> starthead 32, startsector 2048, 785137 sectors; partition 2: ID=0xfd,
> starthead 0, startsector 787185, 15631245 sectors; partition 3: ID=0xfd,
> starthead 0, startsector 16418430, 8000370 sectors; partition 4: ID=0x5,
> starthead 254, startsector 24418800, 1929101265 sectors, code offset 0x63
> 
> My concern is if I were to loose /dev/sda I want to be able to boot via
> /dev/sdb.

yes, because /dev/sda does NOt have GRUB, /dev/sdb has

> Or am I reading the output from file wrong and its actually /dev/sda that
> doesn't have grub2 installed on it?

you see "GRand Unified Bootloader" on /dev/sdb and not on /dev/sda
no idea howyou are interpreting your outputs


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