john hilton wrote:
> My old home esmith box ( a PII 300-400--ish) won't renoot off a hard drive.
> Originally came from its former life with a scsi HDD and everything was fine. 
> Two or three years ago I swapped this for a new 80Gb IDE drive and installed 
> esmith 5.0 It desn't reboot cleanly, so I left a boot floppy in the drive and 
> it is ok. 
> Last weekend I installed esmith 7.0 and on the first reboot (without the 
>   
7.1 has been out for a month. It's best to download it since it saves
having to do an extensive yum update from 7.0

> floppy)  it gave the old error about not being able to boot off the boot 
> device (sorry not more specific, it is in use at present) THe 5.0 boot floppy 
> gives me kernel panic and I cant get it running to the point of configuring 
> and making new boot floppy. 
>
> Currently running off the old scsi HDD, kept in the drawer for such 
> emergencies.
>
> I tried "shortening" the front end of the HDD, in case of early sector 
> failures.. The BIOS only lets me choose hard drive as an option. Maybe if I 
> go back into the bios there will be some setup for hard drives and I can 
> remove any reference to scsi drives. Maybe a scsi cable with an "end" on it 
> is recognised in some way, even without a drive attached.
>   

Shortening the front end of a hard drive sounds like a really bad idea
to me. It deletes the master boot record and probably the first
partition volume boot sector.

I have had extensive experience with windows and linux partitioning in
the last few months. (I didn't intend to, it just happened.) I have
found two CDs and two commands extremely helpful.

Helix v1.8 (http://www.e-fense.com/helix/) is a computer forensics CD.
The first task of the computer forensics specialist seems to be to make
a copy of the target drive and Helix provides very good tools for doing
this. Boot from the CD and run Adepto. It is a GUI interface around the
US Department of Defence's Computer Forensics Lab's version of dd,
dcfldd. Choose your source drive, choose your target drive and clone.
(It's simple, but as the say in computer forensic circles, "don't fuck
up".) This version of dd cloned at 30 meg per second on my machine so
our 128 gig of data came down in just over two and a half hours. You can
clone to and from PATA, SATA, firewire and USB2. I am gearing up to
create back up drives for each of our mission critical machines and will
also use this tool to transition to new hardware.

Another good CD is the Ultimate Boot CD
(http://www.ultimatebootcd.com/). It has lots of useful stuff but
perhaps the best thing is the collection of hard drive tools. These are
just the various disc manufacturers' DOS based disk analysis and
correction programs but they are gathered together in one place, which
is very handy. In relation to your current problem it might be possible
to boot into the UBCD first and then choose to boot a particular hard
drive from there. This should work if your partition tables have not
been hosed.

Last Saturday night my laptop hard drive started throwing drive seek
errors and became quite unstable. I could have run Adepto to a USB drive
but instead I ran a netcat listening daemon on my workstation and a
netcat client on the laptop. An hour and half down for the 30 gig drive,
replace the hard drive with a new 80 gig Samsung for $110 and do the
netcat thing in reverse, reboot and I'm up and running with my dual boot
XP / Ubuntu machine without hours of stuffing around redoing
configurations.

"Ooohhh, netcat listening daemons", I hear you cry. Sounds complicated
but it's literally
(http://www.linuxquestions.org/questions/showthread.php?t=362506) as
simple as:-

on source machine:
Code:

dd if=/dev/hda bs=16065b | netcat targethost-IP 1234

on target machine:
Code:

netcat -l -p 1234 | dd of=/dev/hdb5 bs=16065b

Run the target machine first of course.

You gotta luv the open source.

HTH.

David



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