I'm trying a RAID1 on Ubuntu Server 12.04 in virtual machine and I followed the post: RAID1: How do I "Fail" a drive that's marked as "removed"?
I added two disks and created the RAID1 and it works. After I removed the second disk and added a new disk. Copied the fs on the new and RAID works. But if I remove the first disk, the second will not start. I've a "Operating System not found" Someone can help me? Thank you
Are you using software raid provided by the kernel? If so, be aware that this only mirrors logical constructs on the disk (i.e., a volume) and not the whole disk. Since the bootloader exists outside of the volume that is mirrored, the bootloader is not mirrored for you.
If you are expecting to boot off of either drive, then you must take extra steps to make sure you have your boot loader (i.e., GRUB or whatever you are using) installed properly on both drives.
Another thing to check.
In your BIOS, Check the HDD Boot Priority (if available.) This is not the boot device order. If you have multiple HDDs in you Computer, you can select the primary HDD to boot from.
