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Wheezy install - grub wont write to MBR with RAID and LVM



I am trying to configure a new computer with a ASUS PSH67-M EVO motherboard and a AMD64 Wheezy net install. I have two issues:

1) using the Debian software RAID, I am trying to configure a RAID-1 on two 1.5T disks, with LVM on the RAID partitions.
With this configuration, I get an error that grub cannot be installed to the MBR. (I have tried both a MSDOS partition table, and a
GPT partition table with a grub-bios partition at the start of the disk.

If I try an non-raid config (the default with using the entire disk), everything works.

What do I have to do to get the config I want to work?




2) The Motherboard has Intel Raid support. If I enable the motherboard Raid, the installer does not see the raid disk. (for that matter neither does
my systemrescuecd, but a Ubuntu 11.4 live boot can see it). What do I have to do to make this useable?

Thanks
Stuart


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