[Nix-dev] Grub Install Failure when using boot.loader.devices = [ "/dev/sda" "/dev/sdb" ];

[Roger Qiu]

Hello everybody,

When I run with:

```
boot.loader.device = "/dev/sda"
```

or

```
boot.loader.device = "/dev/sdb"
```

It works.

But when I try to install Grub on both using:

```
boot.loader.devices = [ "/dev/sda" "/dev/sdb" ];
```

This is basically the abridged error message:

```
Path '/boot/grub' is not readable by GRUB on boot. Installation is 
impossible. Aborting. /nix/store/bv..etc...install-grub.pl: installation 
of GRUB on /dev/sdb failed
```

Any ideas?

Additional information:

The sda and sdb are formatted via GPT using sgdisk. I used this command:

```
sgdisk -n 1:2048:+30MB -c 1:"BIOS Boot Partition" -t 1:ef02 /dev/sda
begin=`sgdisk -f /dev/sda`
sgdisk -n 2:$begin:0 -c 2:"Data Partition" -t 2:8300 /dev/sda
```

And did it for both sda and sdb.

Thanks,
Roger

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