grub-setup fails to acess lvm

[niv]

I will provide the info , then the section I couldnt get past:
1.
# cat device.map
(hd0)   /dev/hda
(hd1)   /dev/hdb
(hd2)   /dev/hdc
(hd3)   /dev/sda
(hd4)   /dev/sdb

2.
(chroot) kurbin grub # lvdisplay
File descriptor 6 left open
  --- Logical volume ---
  LV Name                /dev/vg/RaidRoot
  VG Name                vg
  LV UUID                Y6cGVN-LGVo-xgjG-05BM-XdRn-2lPN-dyiTuF
  LV Write Access        read/write
  LV Status              available
  # open                 2
  LV Size                200.00 GB
  Current LE             51200
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:0

  --- Logical volume ---
  LV Name                /dev/vg/boot
  VG Name                vg
  LV UUID                feiwNM-e85R-a33T-ozDL-kHvr-aVB2-w4GwPp
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                32.00 MB
  Current LE             8
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:1

  --- Logical volume ---
  LV Name                /dev/vg/swap
  VG Name                vg
  LV UUID                SDX7rq-Bjtu-D8bR-8OJF-Ov33-cfFj-K9stU5
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                512.00 MB
  Current LE             128
  Segments               1
  Allocation             inherit
  Read ahead sectors     0
  Block device           253:2

3.
(chroot) kurbin grub  # ./grub-setup -d $PWD -v -r '(md1)' -m
$PWD/device.map '(md1,1)'
grub-setup: info: prefix = /grub
grub-setup: error: Can't open /dev/md1,1: No such file or directory

4.
(chroot) kurbin grub # ./grub-setup -d $PWD -v -r '(md1)' -m
$PWD/device.map '(m
d1)'
grub-setup: info: prefix = /grub
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 hd3 is 156301488
grub-setup: info: setting the root device to `md1'
grub-setup: info: opening the device `/dev/sda'
grub-setup: info: will leave the core image on the filesystem
grub-setup: info: attempting to read the core image
`(md1)/grub/core.img' from G
RUB
grub-setup: info: couldn't open the core image
grub-setup: info: error message = unknown device
grub-setup: info: attempting to read the core image
`(md1)/grub/core.img' from G
RUB again
grub-setup: info: couldn't open the core image
grub-setup: info: error message = unknown device
grub-setup: info: attempting to read the core image
`(md1)/grub/core.img' from G
RUB again
grub-setup: info: couldn't open the core image
grub-setup: info: error message = unknown device
grub-setup: info: attempting to read the core image
`(md1)/grub/core.img' from G
RUB again
grub-setup: info: couldn't open the core image
grub-setup: info: error message = unknown device
grub-setup: info: attempting to read the core image
`(md1)/grub/core.img' from G
RUB again
grub-setup: info: couldn't open the core image
grub-setup: info: error message = unknown device
grub-setup: error: Cannot read `(md1)/grub/core.img' correctly


what to put instead of md1??