I'm bad at bootloaders

[cosmo]

I know there are some linux pros around here, and my google-fu is weak today. I'm trying to set up a multi-boot system using GRUB. I'm trying to get to the point where I can boot into Ubuntu, Windows, or whatever distro is the flavor of the week.

Right now I have:

Disk /dev/sda: 1000.2 GB, 1000200658432 bytes
255 heads, 63 sectors/track, 121600 cylinders, total 1953516911 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xb653f696

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1953513471 976755712 7 HPFS/NTFS/exFAT ///////////////////////////This is Windows 8.1. I had to install windows with the other drives disconnected because of some windows installer PITA.

Disk /dev/sdb: 2000.4 GB, 2000394706432 bytes
255 heads, 63 sectors/track, 243200 cylinders, total 3907020911 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000a1260

Device Boot Start End Blocks Id System
/dev/sdb1 2048 976562175 488280064 83 Linux ///////////////This is my /home

Disk /dev/sdc: 64.0 GB, 64019029504 bytes /////////////////SSD
255 heads, 63 sectors/track, 7783 cylinders, total 125037167 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00071ba0

Device Boot Start End Blocks Id System
/dev/sdc1 * 2048 31250431 15624192 82 Linux swap / Solaris ///////////////////////I don't grok swap either
/dev/sdc2 31250432 70311935 19530752 83 Linux //////////////////Ubuntu / primary bootable partition / sometimes I can see grub and I think this is where he lives
/dev/sdc3 70311936 112254975 20971520 83 Linux ////////////This is (mostly)empty space intended for gentoo/arch/LFS/whatever I find time for.

 

[VintagePC]

soo.... what exactly is the problem? Details are useful but we can't really start fixing it unless we know what we need to fix

Are you stuck booting to only one OS (which one)? does the GRUB menu show but not give the correct choices? Error? etc.

 

[cosmo]

I ended up getting it working. I was just an update-grub away, but I still don't totally understand how it works. Thanks for helping, though!