On Mon, Feb 18, 2013 at 9:02 AM, Howard White <[email protected]> wrote:
> Yes, this is work for customers. Who knows, you might have the same problem
> for your customers and we might all do better for the exchange ;)
>
> My company has sold many servers with DAT5 tape drives (36GB native, 72GB in
> the best of all compression circumstances - so of course they tout them as
> 72GB...). These drives are not as reliable and durable as say DLT or LTO.
> Some of my customers also have NAS to which I may connect (remember my mount
> presentation last Tuesday in which I did not discuss CIFS). So what I'd
> like to script is a backup and verify to NAS and then dump the NAS backup to
> tape and verify again given the reliability issue.
>
> Please know that in the years that Tilghman and I worked together, he tried
> to show me some of these things. Did I write them down? Nooooooo. My bad.
>
> So I solicit thoughts on such an exercise. One obvious test that needs to
> occur is to check the size of the NAS archive to make sure it'll fit on the
> tape. The process also needs to be archive utility neutral as we use cpio,
> star, afio and occasionally tar. An archive is an archive is an archive so
> the process of moving an archive to tape "should not" care what the archive
> is -- famous last words.
well..
/bin/ls -ls archive_here | awk '{print $6}'
will give you the file size of the archive
I am a big fan of MD5 or SHA1 for having a hash
The command for building a tar file is trivial.
I'd have to read what you have said more careful to put the parts in
order, but that should be a good start.
Andrew McElroy
>
> Howard
>
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