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Bug#307869: RAID1 partition not marked bootable by installer



On Tue, May 31, 2005 at 03:00:14PM +0300, Anton Zinoviev wrote:
> On Thu, May 05, 2005 at 07:09:26PM -0500, Don Faulkner wrote:
> > The filesystems were initialized and the preliminary data was loaded.  
> > Grub was installed. Following this procedure, the CD-ROM ejected and I  
> > was instructed to reboot. Upon reboot, the BIOS reported that it was  
> > unable to boot from disk.
> 
> Are you sure that was BIOS?  Because for BIOS it is irrelevant whether
> you boot from RAID or from usual partition.
> 
> > I rebooted with the CD and ran fdisk manually on  
> > /dev/scsi/host0/bus0/target0/lun0/disc and  
> > /dev/scsi/host1/bus0/target1/lun0/disc. Using fdisk, I marked partition  
> > 1 on both disks startable (fdisk's 'a' command), and wrote the tables.  
> > When I rebooted, the system booted normally.
> 
> And for grub it is irrelevant whether the bootable flag is set or not.
> 
> Probably the following has happened?
> 
> 1. You installed grub in a partition rather than in MBR.  The disk
> contains the old MBR (probably a DOS or Win one).
> 
> 2. BIOS loads the old MBR.
> 
> 3. The old MBR looks for a partition with a bootable flag set but can't
> find and emits a message that looks like a BIOS message.

I'm pretty sure I've heard of old BIOSes that refuse to boot from a disk
that doesn't contain an active partition.

-- 
Colin Watson                                       [cjwatson@debian.org]



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