On Tue, 26 Feb 2008, Martin Ruslan wrote:

> Dear Justin,
> sounds make sense for the hardware compression.
> but, I never set the hardware compression on the NBU. Did the compression do
> it self without any configuration triggered?
> I mean, is it running automatically for few types of files or datas?
> And this is happening not to all tapes.. only few tapes..
> some is oracle database, and some is windows flatfile.

If the drives can do it, from what I have always seen NetBackup turns it
on by default (other software that I have used may or may not)..

>
> @Simon:
> hopefully not David Copperfield who make strange thing happens on my
> backup.. :)
>
> @everyone:
> So this is normal if it's a database backup? (specially oracle).
> just trying to describe all the inputs.. :)

Yes, especially Oracle.

>
> Rgrds,
> Martin
>
> On Mon, Feb 25, 2008 at 7:04 PM, Justin Piszcz <jpiszcz AT lucidpixels DOT com>
> wrote:
>
>>
>>
>> On Mon, 25 Feb 2008, Martin Ruslan wrote:
>>
>>> Dear gurus,
>>> have you ever meet this condition?
>>> My LTO3 tapes handling more than 800GB (about 1.2TB) on the media's
>> report.
>>> I don't have any idea for this.. The backup not running the compression
>>> also..
>>> Is it maybe the block size or something? Need your advice..
>>>
>>> Regards,
>>> Martin
>>>
>>
>> The tape drive does compression.  We see upwards of 3.0++ to 1 in some
>> cases.
>>
>> Justin.
>>
>