Ken Teh wrote:
John Summerfield wrote:
Troy Dawson wrote:
Ken Teh wrote:
I just installed a 4.5 machine and it hangs when booting at "grub
loading stage 2". Here's the strange part. It hangs only when a SCSI
disk (LVD/SE) disk is attached. SCSI card is an Adaptec 29160. When
the disk is removed, it rips right through the boot. The disk is fine
because I use the 4.5 install disk in rescue mode and I can see the
disk, mount it, and all its data is there. I tried with another disk
and I have the exact same result. I'm baffled!!
Ken
The odd's are that it's because the disks are getting re-ordered when
you plug in and unplug the scsi disks.
Without any disks there, grub is saying "here is my disk on (hd0,0)
and away I go" And since hd0,0 is the right disk, away it goes.
With the other disks there grub is saying "Well, I have two disks,
(hd0,0) and (hd1,0). I'm told I need to boot off (hd0,0) and away I
go" But, in reality, your main system disk is what grub thinks is
(hd1,0) and so it's booting off the wrong disk.
Ken, you can test this by getting to the grub command line and typing
stuff like
help
root (hd0,0)
root (hd1,0)
find
etc etc
Thanks to John and Troy who responded. Unfortunately, I was not able to
resolve it. I've reinstalled grub after specifying grub's root. When I
do this, it hangs at stage 1.5 instead of 2. I've verified it's the
correct root by 'finding' the stage# files. I've tried fixing the order
after reprobing and then editing the device.map file. I've disabled
SCSI boot from the BIOS and verified that the BIOS boot order
corresponds to the device.map order. I've even tried installing the
machine without the SCSI card so that the SL installer does not load the
AIC7xxx driver. All to no avail. I'm pretty sure it's something in
grub. The system was running SL3.x with an IDE system disk and this
external SCSI drive. All I did was reinstall it with SL4.5.
Do you know if it's possible to get to the grub console at bootup but
before it loads stage 1.5 or stage 2? If it is reordering, then I need
a "live" (or in this case, "dead") system to verify instead of booting
succesfully via linux rescue, then grubbing the system.
Boot floppy/CD
I don't recall whether the instructions are in the .info docs or on the
website, but it's fairly straightforward.
The boot CD _can_ be a floppy image burned to a CD, just use the floppy
image (which can be 2.88 Mbytes) as the boot image when running mkisofs.
(I've used the same technique to upgrade my BIOS).
--
Cheers
John
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