You do run the risk of expanding your data if you back it up with
compression... but that depends on the drive technology.
For example, the AIT algo for compression checks to see if the data is
compressible before writing it. If the data is compressible, it writes a
compressed block. If the
Definitely. Every technology needs streaming data for optimized
performance.
One cool thing about M2, it has a huge buffer (32MB). AIT-2 has 8MB. M2
uses this larger buffer to help adjust for varying host speeds. M2 can vary
its tape speed to match the host. With so much memory, it can
DLT has not addressed that issue. Since linear pulls the tape across the
heads at a faster rate (150 inches per second vs helical scan's .5"/second),
it requires streaming -- otherwise you end up "shoe-shining". This
reposition is very intense on the heads/tape of a linear drive.
This applies
I would have to say AIT. Sony pulled the plug on the proposed DDS-5 so I
wouldn't suggest that line at all (end of product life). Also, DAT drives
have 1/5th the head life expectancy (10,000 hours instead of AIT's 50,000
hours).
DLT would definitely be better than DAT but is faced with the
I thought Dantz had an exchange agent? It's on their web site. Are you
trying to back it up from a Mac across the network or from an NT box?
Steve
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
Of Ben Eastwood
Sent: Thursday, December 21, 2000 1:30 PM
I've heard that an "advanced library module" is in the works.
I can't wait! We have lots of customers waiting for that.
Hurry up Dantz! :)
Steve
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
Of Bob Edmiston
Sent: Thursday, November 30, 2000 11:18 AM
It's 14MB/second... per minute would be s slow! :)
I'm looking into it further.
Steve
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
Of matt barkdull
Sent: Tuesday, November 28, 2000 4:39 PM
To: retro-talk
Subject: Re: Ultimate Speed?
Only
Is there a top speed with Retrospect? I have a 24MB/second uncompressed
drive and I'm doing 14MB/second tops.
Steve
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Almost everyone I know hates DAT drives; regardless of the OS or backup
software.
I will only use a technology which has built-in hardware ECC (error
correction) for my backups. As I understand it, this is lacking from the
Onstream drive.
My data is backed up on 8mm (not the old 5 or 7GB
Here's why most DATs fail in autoloaders:
Most people buy DAT loaders to compensate for the low capacity per tape.
The idea is to have the tapes changed automatically in the night or over a
weekend. None of us are thrilled with the idea of having to come into the
office on our personal time to
Speaking of protecting data, there is a way to encrypt your tapes at the
hardware level with different forms of encryption -- all based on Smartcards
with varying access levels.
This works perfectly with Retrospect. This way, if your tape should grow
legs, the data could not be restored -- even
It is possible to encrypt the actual tape/media.
http://www.cybernetics.com/specs/options/encryption/encryption.html
Steve
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
Of david bonde
Sent: Saturday, June 17, 2000 7:13 AM
To: [EMAIL PROTECTED]
Seagate has stopped selling AIT units (although you can still buy leftover
stock in the channels).
All AIT heads are made by Sony but other companies do add-value. For
instance, we have an
optional two line, 40 column LCD not available on a "stock" Sony. It has
two processors
instead of one.
Actually, tape loaders are very inexpensive -- a 15 tape library chassis
costs less than a second AIT-2 drive.
You can't beat the redundancy of two drives though (a lot of customers will
put two AIT drives into a single tape library - the chance of both drives
going south at the same time is
M2 is definitely the drive to beat if you're looking for speed/capacity
(12MB/s native speed, 60GB uncompressed capacity). I have seen
11.8MB/second with Macs and Retrospect in the field.
VXA does 3MB/second. It's a great drive for its class. Native capacity for
VXA is 33GB.
The M2 is
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