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I have an issue while trying to run Windows7 from separate disk, using grub.
Archlinux in on SSD disk (sdb) and is working completely fine.
Windows has his separate SATA disk (sda).
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 465.8G 0 disk
|-sda1 8:1 0 100M 0 part
|-sda2 8:2 0 197.8G 0 part
`-sda3 8:3 0 267.9G 0 part
sdb 8:16 0 111.8G 0 disk
|-sdb1 8:17 0 256M 0 part /boot/efi
|-sdb2 8:18 0 256M 0 part /boot
|-sdb3 8:19 0 81.3G 0 part
| |-vg-lvroot 254:0 0 30G 0 lvm
| | `-root 254:4 0 30G 0 crypt /
| |-vg-lvtmp 254:1 0 1G 0 lvm
| | `-tmp 254:5 0 1G 0 crypt
| |-vg-lvswap 254:2 0 500M 0 lvm
| | `-swap 254:6 0 500M 0 crypt
| `-vg-lvhome 254:3 0 49.8G 0 lvm
| `-_dev_dm_3 254:7 0 49.8G 0 crypt /home
`-sdb4 8:20 0 30G 0 part
sr0 11:0 1 1024M 0 rom I've searched internet to find some clues about it, but as I'm normally don't using windows I just forget how to do it properly. The time when I've used multiboot was when map (hd0) (hd1) was a standard. Now there is EFI and so on, so I'm kinda lost.
### END /etc/grub.d/40_custom ###
menuentry "win7" {
insmod part_msdos
insmod ntldr
insmod ntfs
ntldr (hd0,msdos1)/bootmgr
}I've manually copied ntldr from /lib/grub/i386-pc to /boot/grub/x86_64-efi/ but now instead of "no module" error I get "elf magic" error. Win7 was installed a time ago and it wasn't used earlier as another OS.
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A while ago I dual-booted my laptop with windows 10 and ubuntu, I recall some issues with windows boot and I know my solution was to select "insecure boot" in bios.
I don't fully remember the details of the problem, but it might be worth a shot. (Afaik setting insecure boot can not cause any real damage... now I think of it, I should read up on this)
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A while ago I dual-booted my laptop with windows 10 and ubuntu, I recall some issues with windows boot and I know my solution was to select "insecure boot" in bios.
I don't fully remember the details of the problem, but it might be worth a shot. (Afaik setting insecure boot can not cause any real damage... now I think of it, I should read up on this)
Secure boot would be a problem if the opposite of the OP's problem is true, i.e. he cannot boot into Arch.
OP: Was Win7 pre-installed on the machine or installed afterward? If it was pre-installed then it is likely that the machine has MBR/BIOS which means you are using mismatched firmware/boot-tables (MBR/UEFI):
http://askubuntu.com/questions/281735/h … sing-grub2
Last edited by tyrannis (2015-12-09 11:32:45)
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NTLDR is the loader for WinXP(?) You need to set the partition as root and then 'chainloader +1'.
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You cannot switch from UEFI mode to legacy mode like this with grub. The module doesn't exist in the x86_64-efi for a reason.
Either enable CSM on your mobo and use your mobo's boot menu to boot the two systems, or use grub i386-pc, or install the Windows UEFI bootloader to a ESP with this: https://technet.microsoft.com/en-us/lib … 10%29.aspx
To use this you need to change the ESP's partition type to one of the general FAT types instead of "EFI system" (temporary) though, so that a drive letter can be assigned to it in Windows:
https://social.technet.microsoft.com/Fo … -bcdboot-s
Last edited by tom.ty89 (2015-12-19 19:00:47)
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NTLDR is the loader for WinXP(?) You need to set the partition as root and then 'chainloader +1'.
`ntldr` in grub (with grub i386-pc) can be used to boot Win 7, instead chainloader +1 is the old way.
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