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 -- spambait [log in to unmask] [log in to unmask] -- Advice http://webfoot.com/advice/email.top.php http://www.catb.org/~esr/faqs/smart-questions.html http://support.microsoft.com/kb/555375 You cannot reply off-list:-)