grub-setup is no longer able to set what device to use, it will always give 'grub-setup: error: unknown device' on all valid devices used. This doesn't happen with 0.96.
I've included verbosive output of both version, hopefully it will be of some help.. :)
grub-setup -v '(md0)' grub-setup: info: prefix = /grub grub-setup: info: changing current directory to /dev/mapper grub-setup: info: /dev/sda starts from 0 grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: reading /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: reading /boot/grub/core.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: the size of hd0 is 488397168 grub-setup: info: setting the root device to `md0' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: will embed the core image into after the MBR grub-setup: info: dos partition is -2, bsd partition is -2, prefix is (md0)(md0)/grub grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: /dev/sdb starts from 0 grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: reading /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: reading /boot/grub/core.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: the size of hd1 is 488397168 grub-setup: info: setting the root device to `md0' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: will embed the core image into after the MBR grub-setup: info: dos partition is -2, bsd partition is -2, prefix is (md0)(md0)/grub grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: /dev/sdc starts from 0 grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: reading /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: reading /boot/grub/core.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: the size of hd2 is 488397168 grub-setup: info: setting the root device to `md0' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: will embed the core image into after the MBR grub-setup: info: dos partition is -2, bsd partition is -2, prefix is (md0)(md0)/grub grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: /dev/sdd starts from 0 grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: reading /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: reading /boot/grub/core.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: the size of hd3 is 488397168 grub-setup: info: setting the root device to `md0' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: will embed the core image into after the MBR grub-setup: info: dos partition is -2, bsd partition is -2, prefix is (md0)(md0)/grub grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd'
grub-setup -v '(md0)' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: the size of hd0 is 488397168 grub-setup: info: the size of hd1 is 488397168 grub-setup: info: the size of hd1 is 488397168 grub-setup: info: the size of hd2 is 488397168 grub-setup: info: the size of hd2 is 488397168 grub-setup: info: the size of hd3 is 488397168 grub-setup: info: the size of hd3 is 488397168 grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda1' grub-setup: info: opening the device `/dev/sda1' grub-setup: info: opening the device `/dev/sda1' grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd0 is 488397168 grub-setup: info: opening the device `/dev/sda' grub-setup: info: opening the device `/dev/sda' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb1' grub-setup: info: opening the device `/dev/sdb1' grub-setup: info: opening the device `/dev/sdb1' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd1 is 488397168 grub-setup: info: opening the device `/dev/sdb' grub-setup: info: opening the device `/dev/sdb' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc1' grub-setup: info: opening the device `/dev/sdc1' grub-setup: info: opening the device `/dev/sdc1' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd2 is 488397168 grub-setup: info: opening the device `/dev/sdc' grub-setup: info: opening the device `/dev/sdc' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd1' grub-setup: info: opening the device `/dev/sdd1' grub-setup: info: opening the device `/dev/sdd1' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: the size of hd3 is 488397168 grub-setup: info: opening the device `/dev/sdd' grub-setup: info: opening the device `/dev/sdd' grub-setup: info: prefix = /grub grub-setup: info: changing current directory to /dev/mapper grub-setup: info: /dev/sda starts from 0 grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: reading /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/boot.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: info: reading /boot/grub/core.img grub-setup: info: getting the size of /boot/grub/core.img grub-setup: error: unknown device
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