[lug] Live disk attach?

[Kevin Fenzi]

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>>>>> "William" == William Petty <billpetty at adelphia.net> writes:

William> Two Questions.  1) I am trying to do some hard drive
William> debugging on a live running Linux system.  I am attaching an
William> unknown drive to the second channel of my SCSI controller and
William> powering it up.  It there a way for the OS to re-scan for the
William> new device without rebooting?  My intention is to run fdisk
William> and mkfs and perform various integrity checks on many
William> different drives without rebooting each time.

       echo "scsi add-single-device a b c d" > /proc/scsi/scsi

where    a == hostadapter id (first one being 0)
          b == SCSI channel on hostadapter (first one being 0)
          c == ID
          d == LUN (first one being 0)

William> 2) When doing full backups, what is the best method (using a
William> commonly bundled program), and what should be in the backup
William> file set?  When I was on DOS or OS2, I used to just backup C:
William> and or D: with tar.  What was great, was that I was able to
William> replace the hard drive, boot a minimal floppy based system
William> and restore all.  Upon reboot, it was as if nothing had
William> changed except having new drive. (Usually bigger)

William> Can this be done for Linux?  I.E. boot of a CD and restore
William> all from tape.

Sure, many diffrent ways. 

rsync to another machine. 

rsync -e ssh -a -v / backup at remotemachine:/home/backup/ 

tar using ssh to another machine.

amanda
Check www.freshmeat.net for more. 

A number of commercial programs (bru, etc).

kevin



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