We got a winner!!!!
10X for the help!
Gili
Subject: Re: DD and split problem (need ideas)....
Date: Tue, 2 May 2006 12:14:32 +0300
On Tue, 2 May 2006 18:35:25 +1000, Amos Shapira wrote: > On 5/2/06, gili
gili wrote: > > > > I know I can use "split" command. But the restore is
problematicÂ… > > cat backup.img.gz.* | gzip -dc | dd of=/dev/hda1 > > But
if I change the DVD to the one that have the new image, cat will "lose > >
count"Â… > > Untested idea: > > 1. "mkfifo fifo" > 2. do "cat fifo fifo
fifo... | gzip...". repeat "fifo" on the cat > command line to the > number
of input DVD's. > 3. dd from the dvd's into "fifo", one at at time. > > The
repating of "fifo" is required because every time "dd" closes the fifo cat
> gets an EOF. You overcome this by telling cat that its next file to read
is > (tararam...): fifo.
The above should work but you need to know the number of DVDs (or to use
many fifo, so it is always sufficient).
Instead you can use subshell (tested) like this:
( FLAG=any while [ $FLAG ] do cat
/DVD-MOUNT-DIR/backup.img.gz.* echo "Please put next DVD and press
Y + Enter" > /dev/tty echo "If there is none, press Enter only" >
/dev/tty read FLAG < /dev/tty done ) | gunzip -c | dd
of=/dev/hda1
You can do any other needed operation in the loop (like unmounting and
mounting the new DVD).
Ehud.
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