Greetings

Backup is becoming a real issue on our Health Care sites - even on a small
site, capacities run into 80 - 90 GB.
We use DDS3 now, sometimes in parallel, and try to keep backup times down
below 2 - 3 hours, but this becoming unworkable.
With Hardware Compression, we generally get a 3 -1 ratio, so we can fit up
to 36GB on a single media.
I don't think DDS4 is supported on K series boxes (our favourites).

I'm looking for a quantum leap in backup speed.
At HPWorld I saw LTO (Linear Tape Open) drives and media.
From HP's website at http://www.hp.com/tape/ultrium/index.html :-

"The ultra-fast HP SureStore Ultrium 230 stores up to 200 GB* of data on a
single tape at a sustained transfer rate of 30MB/s*. With ultimate
reliability and ease of use in mind, the rugged design builds on the best
existing technologies to create a new level of data protection."

Now, this sounds better - If I can get 3-1 on these babies, I'll have 300 GB
per stick, all within 2 hours. And the technology is at it's very beginning
- so we should expect the same exponential advances as we saw with DDS - 1
through 4.

Question is, are they real, and do they work on K series HP3000's?

Of course, I won't retire until there is Liquid Memory Technology (LMT)
available on tap, and we can just pour data into LMT Vessels :)

Regards

Neil



-----Original Message-----
From: Stan Sieler [mailto:[log in to unmask]]
Sent: Saturday, December 02, 2000 2:03 AM
To: [log in to unmask]
Subject: Re: Disk capacity on an 979KS


Re:

> The Fast Wide SCSI limit is 15 devices per channel,
> although this is not recommended for performance reasons.
> I don't think HP currently supports drives larger than
> the 36GB ones, which would limit you to 540GB per controller.

MPE/iX 6.5 supports 72 GB drives, which (at 15 per channel) would
be 1 TB per controller!

That question about backing it up just got harder :)

> You can add several I/O expanders, with their own card cage,
> and an additional HP-PB expansion, etc. (The HP-PB only goes
> to 32mb a second, so several SCSI channels per PB can keep
> it mighty busy.)

<plug> DiskPerf, from Allegro, could be used to test the
I/O capacity of a system.
</plug>
Stan Sieler                                           [log in to unmask]
www.allegro.com/sieler/wanted/index.html          www.allegro.com/sieler