On Friday 31 December 2004 15:59, Omer Zak wrote:
> Seems that your BIOS never recognized your IDE drives (or it stopped
> recognizing them due to some reason).
Of course, but the question is why.

> Check your BIOS setup settings.
I already did that before writing - the settings have not changed. There is a 
setting to dis-able one or both of the ide channels, but everything is and 
was enabled.

BTW, this is not a disk problem because I tried swapping the ide1 and ide2 
cable and that resulted in my 2 disks being recognized but my 2 optical 
drives NOT being recognized. So the problem is definitely with ide1 and not 
ide2 or the various devices attached to either one.

> When Linux starts up, it carries its own hardware recognition procedure,
> independently of what the BIOS recognized or not.  So it is possible for
> Linux to work happily with hardware, which was not recognized at all by
> BIOS.
I didn't know that. That explains why after booting everything works. I guess, 
knowing that, I could add noauto to the fstab entries for hda and hdb (/ is 
on sda so I can boot) and add a startup script to mount the partitions on hda 
and hdb after booting. That would avoid the problems caused by having them 
automatically booted in fstab, but that seems to be avoiding (rather than 
solving) the problem.

> Did you ever boot your PC after Linux installation, before the UPS
> episode, and it booted OK?  If not, this may be where the dead dog is
> buried.
As I wrote a few days ago, on another subject, I went through Murphy's Law 
hell on this installation, so yes I booted MANY times before, during and 
after the install and everything was OK. 

BTW, in response to Shaul Karl's question, this is an old UPS - only 
electrical connection. It has no communication interface so is no connected 
to serial or USB so could not have any effect. But, just in case, I did try 
without the UPS and it made no difference.

> [By the way, this hypothesis makes your question on-topic on this mailing
> list.]
>
> On Fri, 31 Dec 2004, solomon wrote:
> > I have a strange problem on my new computer. It may be hardware related,
> > but I decided to ask here first before going back to the store.
> >
> > I have 1 sata drive (sda1), 2 ide drives (hda, hdb) and 2 optical drives
> > (hdc, hdd). Everything was working fine for a few weeks until I had to
> > re-boot to hook the machine to my UPS. Now, for no (apparent) reason, at
> > boot, the computer doesn't recognize hda and hdb (the first IDE
> > interface). For that reason, I couldn't boot LINUX (fstab errors). I used
> > a rescue disk to edit fstab and got the computer running. Strangely
> > enough, I can manually mount the partitions on hda and hdb, even though
> > BIOS didn't seem to see them. Of course, although this works, it's not a
> > solution since I don't want to have tomanually mount partitions.
> >
> > Aside from the obvious fact that Mandrake seems to handle my ide disks
> > better than the motherboard does, can anyone tell me if I'm looking at a
> > hardware or software problem? I'm not including any details about
> > motherboard, BIOS, etc since, if this is a hardware problem, this entire
> > message is actually OT.
>
>                                              --- Omer
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-- 
Shlomo Solomon
http://come.to/shlomo.solomon
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