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Old 11-27-2014, 01:04 PM   #1
iceman81
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Registered: Jan 2013
Location: New Jersey
Distribution: CentOS, Arch
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grub.conf - cant get a drive to boot.


so i recently reinstalled my centos hdd and at one time had my hackintosh HDD & windows drive working with it. playing with the grub file i got windows to boot as default and the centos drive just fine(windows switched to the MacOS line and i just changed the title and location in the list). Now i can't seem to find the right location of the MacOS(and if i boot the drive straight from bios it starts just fine.

**note: if you look at the grub.conf you'll see that i was trying to take a shot in the dark to find the Mac Drive.**

any help would be appreciated - HAPPY THANKSGIVING!

***FDISK -L PRINT OUT***

[root@localhost iceman]# fdisk -l

WARNING: GPT (GUID Partition Table) detected on '/dev/sdc'! The util fdisk doesn't support GPT. Use GNU Parted.


Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x00000000

Device Boot Start End Blocks Id System
/dev/sdc1 * 1 121602 976762583+ ee GPT
Partition 1 does not start on physical sector boundary.

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xf40a6bdf

Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 19458 155777024 8e Linux LVM

Disk /dev/sdb: 128.0 GB, 128035676160 bytes
255 heads, 63 sectors/track, 15566 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x59e31237

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 13 102400 7 HPFS/NTFS
Partition 1 does not end on cylinder boundary.
/dev/sdb2 13 15566 124930048 7 HPFS/NTFS

Disk /dev/mapper/vg_livedvd-lv_root: 53.7 GB, 53687091200 bytes
255 heads, 63 sectors/track, 6527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/vg_livedvd-lv_swap: 8355 MB, 8355053568 bytes
255 heads, 63 sectors/track, 1015 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000


Disk /dev/mapper/vg_livedvd-lv_home: 97.5 GB, 97471430656 bytes
255 heads, 63 sectors/track, 11850 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

***GRUB.CONF CONTENTS***

[root@localhost iceman]# cat /etc/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd0,0)
# kernel /vmlinuz-version ro root=/dev/mapper/vg_livedvd-lv_root
# initrd /initrd-[generic-]version.img
#boot=/dev/sda
default=0
timeout=5
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu

title Windows 7
rootnoverify (hd1,0)
makeactive
chainloader (hd1)+1
title CentOS (2.6.32-358.18.1.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-358.18.1.el6.x86_64 ro root=/dev/mapper/vg_livedvd-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_livedvd/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=128M rd_LVM_LV=vg_livedvd/lv_swap KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-358.18.1.el6.x86_64.img
title CentOS (2.6.32-279.el6.x86_64)
root (hd0,0)
kernel /vmlinuz-2.6.32-279.el6.x86_64 ro root=/dev/mapper/vg_livedvd-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_livedvd/lv_root rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=128M rd_LVM_LV=vg_livedvd/lv_swap KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
initrd /initramfs-2.6.32-279.el6.x86_64.img
title MacOS(4)
rootnoverify (hd4,0)
chainloader +1
title MacOS(2)
rootnoverify (hd2,0)
chainloader +1
title MacOS(3)
rootnoverify (hd3,0)
chainloader +1
 
Old 11-27-2014, 02:17 PM   #2
yancek
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Registered: Apr 2008
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The Mac is on sdc1 so the (hd2,0) line should work if you have the boot files there. The problems might be that it is GPT and the other smaller drives are MBR. I don't use UEFI/GPT so that's basically a guess. Can't usually mix them.
 
  


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