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aaronjb
Tux's lil' helper
Joined: 25 May 2003
Posts: 106
Location: Berkshire, UK
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 Posted: Sun Feb 12, 2006 8:40 pm Post subject: [SOLVED] YAGT - Grub doesn't see sdb as hd1 at boot-time.. |
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Yip, this is YAGT - Yet Another Grub Thread 
Now, I've searched around, naturally, and found lots of threads re: grub and SATA drives - but mostly those were the threads that I'd already used to get Gentoo up on my main desktop aeons ago (which is a configuration of PATA drive for Linux & SATA drive for Windows, which Grub map's to trick Windows into booting).
I've been putting together a Shuttle SK43G box as an HTPC, and up till now it's been running XP off a 300Gb SATA drive.
I decided (now that I've put a new video card in there and relegated the badly supported on-board UniChrome graphics card to the bin) that I'd try Gentoo on there again.
So I popped in a second 120Gb SATA drive as the primary (sda) and installed Gentoo.
So now my system looks like:
| Code: |
/dev/sda < Gentoo Linux, partitioned as:
/dev/sda1 /boot
/dev/sda5 /
/dev/sda6 /var
/dev/sda7 swap
/dev/sda8 /home
/dev/sdb < Windows XP, partitioned as:
/dev/sdb1 NTFS, bootable
/dev/sdb5 NTFS, data partition
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All goes fine - I install grub and soforth, and running grub-install /dev/sda created a device.map that contained:
| Code: | # cat device.map
(fd0) /dev/fd0
(hd0) /dev/sda
(hd1) /dev/sdb |
All's fine so far..
Sadly, upon rebooting and trying the Windows option in Grub, I'm presented with a 'drive not found' error.
Trying to find (hd1) via tab completion fails miserably too - so Grub can't see hd1 at all, only hd0 (where Linux is)
Now, for the time being I can boot Windows by flipping the boot order in the BIOS, so that's no biggie, but - it would be nice to just use Grub 
So - am I right in thinking that Grub merely sees the drives as presented by the BIOS? Worth noting that the BIOS seems to detect the two drives fine (on IDE channels 3 & 4, in BIOS-speak), and they're not part of a RAID pair or anything like that, just two distinct drives.
Quite possible this is something peculiar to the BIOS on the Shuttle motherboard, just wondering if anyone has come across this before - as I certainly haven't, Grub has never given me an ounce of grief before now
Ta,
Aaron
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Last edited by aaronjb on Wed Feb 15, 2006 10:38 pm; edited 1 time in total |
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bobspencer123
Guru
Joined: 19 Dec 2005
Posts: 544
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| Posted: Sun Feb 12, 2006 9:01 pm Post subject: |
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| what does you grub.conf look like? |
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aaronjb
Tux's lil' helper
Joined: 25 May 2003
Posts: 106
Location: Berkshire, UK
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| Posted: Sun Feb 12, 2006 9:24 pm Post subject: |
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Pretty much ripped straight off the other box that works - and if Grub can't see (hd1) when it's in commandline mode, I'm not sure there's any changes that could be made.. but anyhoo:
| Code: | default 0
timeout 30
splashimage=(hd0,0)/grub/splash.xpm.gz
title=Windows XP Professional
rootnoverify (hd1,0)
map (hd1) (hd0)
map (hd0) (hd1)
chainloader +1
title=Gentoo 2.6.15-gentoo-r1
root (hd0,0)
kernel /kernel-2.6.15-gentoo-r1 root=/dev/sda5 |
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cyrillic
Watchman
Joined: 19 Feb 2003
Posts: 7313
Location: Groton, Massachusetts USA
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| Posted: Mon Feb 13, 2006 2:39 am Post subject: Re: YAGT - Grub doesn't see sdb as hd1 at boot-time.. |
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| aaronjb wrote: | | So - am I right in thinking that Grub merely sees the drives as presented by the BIOS? |
Yes.
Most BIOSes show all drives in the boot order, but it looks like yours only shows the first one. I don't know of any GRUB tricks to work around that. You just need to complain to the motherboard manufacturer about that, and see if they have a BIOS update to fix it. |
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aaronjb
Tux's lil' helper
Joined: 25 May 2003
Posts: 106
Location: Berkshire, UK
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| Posted: Mon Feb 13, 2006 9:02 am Post subject: Re: YAGT - Grub doesn't see sdb as hd1 at boot-time.. |
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Thought as much.. pah - rubbishy VIA motherboards 
What a braindead bit of BIOS design, too - would neatly break all cross-drive bootloaders. Still, I shall go rant at Shuttle, and no doubt be summarily ignored
Thanks,
Aaron
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aaronjb
Tux's lil' helper
Joined: 25 May 2003
Posts: 106
Location: Berkshire, UK
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| Posted: Wed Feb 15, 2006 10:37 pm Post subject: |
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In case anyone has the same problem in the future and finds this post by searching:
The problem with Grub not detecting the second SATA hard drive ( hd1 ) on my Shuttle SK43G at boot time (there, think that's all the search keywords covered) was definitely down to the BIOS.
BIOS versions after FX43S410 (available from [url=ftp://ftp.shuttle.com/BIOS/fx43g(sk43g)/]Shuttle's FTP site[/url]) have been fixed to present both SATA drives to the system via the BIOS when running in IDE (rather than RAID) mode.
Just remember to reset the CMOS data after flashing, otherwise (like me) you'll start to panic when the system no longer boots..
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Installing Gentoo
