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Weird Grub HD Naming Question???
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elboricua
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Joined: 17 May 2002
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Location: Bronx, NY

PostPosted: Sat May 25, 2002 3:22 pm    Post subject: Weird Grub HD Naming Question??? Reply with quote

Ok this is weird. I am used to grub doing some weird things but this has to take the cake. I know that grub uses different syntax for hd. /dev/hda become (hd0,0) /dev/hdb (hd1,0) and so on and so on.

My hard drive is attached to a promise controller. First drive on the promise controller and has always been seen as /dev/hde. Ok here is the strange part for me at least. Following grubs hd naming scheme my hd should be (hd4,0) right? Well according to grub it is (hd0,0) That is the only way grub will see the drive. It then detects the drive, what FS it is running.

Is this right? Shouldn't it be (hd4,0)
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amigadave
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Joined: 29 Apr 2002
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PostPosted: Sat May 25, 2002 4:38 pm    Post subject: Reply with quote

Yep that's right. GRUB sees the first hd as hd0, second as hd1 and so on. There is no mapping between ide-controller and disk number. For example if you had a single hd on your motherboard's ide controller (primary or secondary) it would be hd0, and if you then had a drive on your Promise controller it would be hd1 (not hd4 because it's on the 5th channel). I'm sure that this is explained in the GRUB documentation though.
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elboricua
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PostPosted: Sat May 25, 2002 5:13 pm    Post subject: Thanks, Reply with quote

Was wondering what was going on with that. I am to used to Lilo. Figured I would give grub a shot and not just emerge lilo.

I read through the documentation earlier this morning. Fascinating stuff. I am thinking of changing the splash. Found out you could do when reading up on

http://www.gnu.org/software/grub/grub-faq.en.html and

http://www.gnu.org/manual/grub-0.90/html_node/grub_toc.html and

http://forums.gentoo.org/viewtopic.php?t=31&highlight=grub

BTW Nice avatar :D
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TheWart
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Joined: 10 May 2002
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PostPosted: Sun May 26, 2002 4:04 am    Post subject: Reply with quote

Hmm, if you go to the gentoo mail archives, i believe a guy actually made a gentoo splash for grub.
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linuxusr
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Joined: 18 May 2002
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PostPosted: Sun May 26, 2002 4:27 am    Post subject: For what it's worth Reply with quote

When I installed gentoo it was on a scsi drive .. the only drive in the box. (hd0,0)
hda is a ide cdrom on the motherboards ide0 master
ide1 on the motherboard is disabled

I then added 2 ide drives on an ata100 card
primary master and secondary master (hdc and hde)

Now grub sees the scsi as hd2
hd0 is the ata100 ide0 master
hd1 is the ata 100 ide1 master

Telling the cmos to boot the scsi
Grub booted the scsi fine when it was the only dirve from the mbr
since the addition of the other 2 drives
I havent gotten grub to boot the scsi from it's mbr
I have to use a boot disk

at least it boots <g>

Linuxusr
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tsuru
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Joined: 19 Apr 2002
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PostPosted: Sun May 26, 2002 4:42 am    Post subject: device.map Reply with quote

read this thread:

http://forums.gentoo.org/viewtopic.php?t=1568&highlight=grub

pay special attention to the device.map
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