I read the documentation for both drives in 
http://h18006.www1.hp.com/products/quickspecs/12128_div/12128_div.html and 
http://www.quantum.com/Products/TapeDrives/LTOUltrium/LTO-2HH/Index.aspx, and I 
believe you can go for the Quantum. Same 64 MB buffer memory size, same 
Ultra160 interface (the HP drive has a SAS model, too), very similar transfer 
rate, at a lower price than the HP drive.
You should check if your prices are for external units and the terms of the 
warranty. Regards,

Georger

----- Mensagem original ----
De: Don MacArthur <[EMAIL PROTECTED]>
Para: bacula-users@lists.sourceforge.net
Enviadas: Quinta-feira, 12 de Outubro de 2006 13:38:44
Assunto: Re: [Bacula-users] DLT or LTO-2 drive

On Thu, 2006-10-12 at 18:00 +0200, Gour wrote:
> On Thu, 2006-10-12 at 09:28 -0600, Don MacArthur wrote:
> 
> > lto is faster to backup and restore.  The drives change speed to match
> > the data transfer rate, which will extend the life of both the drives
> > and the media.  
> 
> Oh, I didn't know that.
> 
> > The lto media has higher capacity, and cost per data unit is lower. 
> >  I've been running this config for about 1.5 years with no drive or
> >  media problems.  
> 
> Is there any advantage of dlt over lto-2 ?
Yes:
- capacity
- speed
- technological lifespan (newer, so will probably be around after dlt is
gone)
- durability (drive match data rate so drives and media have a longer
lifespan 

We paid about US $2300 for an external hp960 a few months ago.  You may
need fewer lto tapes (because they hold more data), so maybe this will
offset the higher cost of the drive.  I load 700GB+ on my lto4 tapes, so
3 may be all you need to do a full backup.  

I use bacula to backup about 14 servers (win/lin/osx) nightly.  I run 20
jobs, concurrently backing up each server to tape and raid.  As one job
finishes, another waiting job starts.  Takes about 2 to 3 hours.  

I backed up a 3TB raid in a few hours this hardware with bacula.  Maybe
the time saved doing backups, and the faster restore performance (faster
uptime) can be used to help justify the higher cost...  

FWIW.
> 
> Sincerely,
> Gour
> 
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