Mitchell Laks wrote:
> Hi,
>
> I have a (remotely stationed) server with a raid5 with about 630 GB of data
> that I would like to backup to a set of removeable hard drives on another
> pc at the same location.
>
> I will use 250GB hard drives as removeables. Based upon experimentation with
> data I find that using tar zcvf I will get the size of the data stored to
> about 330GB of storage.
>
> the removeable drive is mounted on /mnt/backup at 192.168.0.1.
>
> So I thought to do
>
> tar zcf - directory|ssh [EMAIL PROTECTED] "cat >/mnt/backup/backup.tgz"
>
> but that would be too big for the destination drive.
>
> I thought of trying to use split at the destination side, but
>
> tar zcf - directory|ssh [EMAIL PROTECTED] "split -b \
> 230000m /mnt/backup/backup"
>
> but this wouldnt work either.
> while this would appropriately split the target into 2 files, it would still
> run out of space and would not enable me to umount and remount the hard
> drive...
>
> then maybe something like
> tar zcf - directory| split -b 23000m | ssh [EMAIL PROTECTED] " cat
>
>>/mnt/backup/backup"
>
>
> but that doesnt work
>
> Is there a cool unix tool (or an idea for a perl script) to use combined
> with
> split on the server side, that will then pause after split finishes creating
> the first file so that I can umount the first drive remotely and mount the
> second drive to receive the rest of the data?
>
> I guess I could replace/recreate split on the server side
> as a perl script which would count the data as it sent it and stop sending
> when it got to 220G or so and then I could write a second script that would
> throw away the first 220Gb and start from there.
>
> my $buff;
> for (my $count = 0; $count < 220000000; $count++) {
> while (read(STDIN, $buff, 1024) {
> print STDOUT , $buff;
> }
> }
>
> I suppose I could calculate in advance a split of the directory into 2
> roughly
> equal parts, but that would be less fun than having a way of splitting and
> then pausing...
>
> Is there a better way?
If I understand correctly, the problem is that you have 2 removeable
drives and you can't mount them both at the same time, and one isn't
sufficient to contain all the data right?
>
> Mitchell
>
>
>
>
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