Comment 23 for bug 681535

i'm using grub 1.99

i am using this setup:
GPT on sda and sdb (see parted paste below)
/dev/sda2 + /dev/sdb2 = /dev/md0
/dev/md0 is a pv (for lvm)

i installed my nixos system (yes no ubuntu) into /dev/myVolGrp/system and i'm not using an additional boot partition as /dev/sda1 or /dev/sdb2; they are only there so that i can put grub2 stuff there. my system is directly booted from lvm;

so why do i post this, because i had a similar error:
nixos-rebuild switch --fast
building the system configuration...
updating GRUB 2 menu...
installing the GRUB bootloader on /dev/sda...
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: error: no such disk.
Auto-detection of a filesystem of /dev/mapper/myVolGrp-system failed.
Try with --recheck.
If the problem persists please report this together with the output of "/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub" to <email address hidden>

/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: Cannot stat `/dev/disk/by-id/scsi-35000c5003f556643', skipping.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: Cannot stat `/dev/disk/by-id/scsi-35000c5003f5363a6', skipping.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to /dev.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to pts.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to shm.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to myVolGrp.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to md.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to disk.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-label.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-uuid.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-partlabel.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-partuuid.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-path.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to by-id.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to snd.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: changing current directory to mapper.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: info: opening myVolGrp-system.
/nix/store/iaypdz5mm1qk8izs9412cb28v9vwwcn4-grub-1.99/sbin/grub-probe: error: no such disk.

but all i did was:
cd /boot/grub
cat device.map
(hd0) /dev/disk/by-id/scsi-35000c5003f556643
(hd1) /dev/disk/by-id/scsi-35000c5003f5363a6

then
rm /boot/grub/device.map

and after i had removed the device.map file, grub-install would just work!

hope this helps someone.
thanks a lot to Jordan_U#<email address hidden>

parted:
Number Start End Size File system Name Flags
 1 17.4kB 2000kB 1983kB non-fs bios_grub
 2 2097kB 3001GB 3001GB primary

[root@nix9000:~]# lvdisplay
  --- Logical volume ---
  LV Path /dev/myVolGrp/system
  LV Name system
  VG Name myVolGrp
  LV UUID pszfD0-hAY8-A0QS-SFCr-ZI77-5KYP-QL2ziR
  LV Write Access read/write
  LV Creation host, time ,
  LV Status available
  # open 1
  LV Size 50.00 GiB
  Current LE 12800
  Segments 1
  Allocation inherit
  Read ahead sectors auto
  - currently set to 256
  Block device 254:0

  --- Logical volume ---
  LV Path /dev/myVolGrp/swap
  LV Name swap
  VG Name myVolGrp
  LV UUID LE9YTS-wKUP-3VCb-Wv2t-WLEf-xgP6-h2yrX6
  LV Write Access read/write
  LV Creation host, time ,
  LV Status available
  # open 2
  LV Size 8.00 GiB
  Current LE 2048
  Segments 1
  Allocation inherit
  Read ahead sectors auto
  - currently set to 256
  Block device 254:1

pvdisplay
  --- Physical volume ---
  PV Name /dev/md127
  VG Name myVolGrp
  PV Size 2.73 TiB / not usable 888.00 KiB
  Allocatable yes
  PE Size 4.00 MiB
  Total PE 715396
  Free PE 700548
  Allocated PE 14848
  PV UUID 22ycjZ-h0Bd-fPqc-4FMZ-CZcw-KIXb-S2gnEX