LISTSERV mailing list manager LISTSERV 16.0

Help for ARSCLIST Archives


ARSCLIST Archives

ARSCLIST Archives


[email protected]


View:

Message:

[

First

|

Previous

|

Next

|

Last

]

By Topic:

[

First

|

Previous

|

Next

|

Last

]

By Author:

[

First

|

Previous

|

Next

|

Last

]

Font:

Proportional Font

LISTSERV Archives

LISTSERV Archives

ARSCLIST Home

ARSCLIST Home

ARSCLIST  July 2008

ARSCLIST July 2008

Subject:

Re: Digital AUdio File Backups

From:

"Richard L. Hess" <[log in to unmask]>

Reply-To:

Association for Recorded Sound Discussion List <[log in to unmask]>

Date:

Fri, 18 Jul 2008 15:41:09 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (93 lines)

At 02:44 PM 2008-07-18, Wasserman, Robert A - WHS wrote:

>We were recently told by IT here that we may lose our space on the
>server and our hard drives are also getting full soon. So here are my
>questions:

You really need to find an IT department that can provide a trusted 
digital repository and leave it at that... But, short of that 
solution, comments follow below.


>1: What good or bad experiences have people had with extracting digital
>audio files from server backup tapes?

If the IT department is not able to provide for your storage needs, I 
worry about their backups as well. What tape technology are they 
using? So far, the best large-scale tape format appears to be LTO. In 
fact, it appears to be the only one with significant traction in the 
marketplace moving forward. If the tape is LTO, I would worry less 
than if it were something else.

>2: Assuming a digital audio file made it onto more than one backup tape
>(stored in different locations) before being taken off a server, can we
>trust these multiple backup tapes as our ONLY copies?

I don't know if I would, but your LaCie drives also still have copies.

>3: What is the guideline these days on digital audio file backups? Is
>having 2 copies, one on a server, one that is backed up to tape enough?
>Should we keep a gold CDR/DVDR even with the other 2 copies existing?

Considering the massive amounts of data that are being generated by 
all manner of digital archiving (audio, video, scanned images, etc.), 
I think optical media is too small, too time-consuming, 
space-consuming, and costly for backups. Yes, it will probably last 
if you use gold pthalocyanine dye disks for CDs or equivalent gold DVD-Rs.

>4:Now that people have been using gold CDR's for awhile now, has anyone
>lost a file on a gold CDR due to scratches or other damage, and having a
>backup CDR would have or did solve this file problem?

I have only had some issues with silver pthalocyanine dye disks that 
have been in my car for 7 years off-and-on and then only in the car 
player (which may be an issue) and they've been kept in wallets 
rather than jewel cases. Everything I've pulled off CD-R (and 
surprisingly DAT tapes) in my archives has come back with no 
noticeable degradation. (I'm not recommending DATs for archival 
storage, but they were available before CD-R).

I have a theory that if you're using hard drives three copies with 
one off-site should be adequate. If you are using RAID-5 NAS boxes 
then two copies with one off-site should be adequate. I do not 
propagate deletes from one NAS to the other.

For the volume of stuff we need to store today, I think the 
multi-slot RAID-5 appliances make most other storage media obsolete. 
Both Netgear and Thecus ( www.netgear.com and www.thecus.com ) have 
excellent products. Thecus wins a bit on price/performance ratio and 
is faster than the Netgear.

I have a pair of Netgear ReadyNAS NV+ with 4x500 GB drives providing 
about 1.3 TiB of available RAID-5-protected storage. I also recently 
purchased a pair of Thecus N5200Pro with 4x1000 GB drives providing 
about 2.6 TiB of available RAID-5 protected storage. I can add 
another 1000 GB drive to each and then rebuild the RAIDs for a 
maximum of about 3.5 TiB of storage.

With these added drives, I would have about 4.8 TiB (about 5.5 TB) of 
storage in two appliances. I can add another 1.3 TiB (1.5 TB) of 
storage by changing out the Netgear units' 500 GB drives with 1000 GB 
drives, but the cost per added GB is high with this method.

The trigger for this upgrade right now is that one of my sons was 
looking for a summer job and proposed scanning our family negatives, 
so we're doing 18 MB files from each negative and 36 MB files from 
some of my higher-quality slides. We probably have about 50 000 
images all told to scan, dating from the 1950s (and a few before). 
I'm expecting the scanning project to generate about 1.6-1.8 TiB of 
data. We have about 0.92 TiB of data on the server going into this, 
plus the in-process audio work on the Netgear NAS pair.

One pair of servers is located off-site at the end of a fibre optic 
cable and backup routines run every night using www.tgrmn.com ViceVersaPro.

Cheers,

Richard

Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes. 

Top of Message | Previous Page | Permalink

Advanced Options


Options

Log In

Log In

Get Password

Get Password


Search Archives

Search Archives


Subscribe or Unsubscribe

Subscribe or Unsubscribe


Archives

March 2024
February 2024
January 2024
December 2023
November 2023
October 2023
September 2023
August 2023
July 2023
June 2023
May 2023
April 2023
March 2023
February 2023
January 2023
December 2022
November 2022
October 2022
September 2022
August 2022
July 2022
June 2022
May 2022
April 2022
March 2022
February 2022
January 2022
December 2021
November 2021
October 2021
September 2021
August 2021
July 2021
June 2021
May 2021
April 2021
March 2021
February 2021
January 2021
December 2020
November 2020
October 2020
September 2020
August 2020
July 2020
June 2020
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
March 2019
February 2019
January 2019
December 2018
November 2018
October 2018
September 2018
August 2018
July 2018
June 2018
May 2018
April 2018
March 2018
February 2018
January 2018
December 2017
November 2017
October 2017
September 2017
August 2017
July 2017
June 2017
May 2017
April 2017
March 2017
February 2017
January 2017
December 2016
November 2016
October 2016
September 2016
August 2016
July 2016
June 2016
May 2016
April 2016
March 2016
February 2016
January 2016
December 2015
November 2015
October 2015
September 2015
August 2015
July 2015
June 2015
May 2015
April 2015
March 2015
February 2015
January 2015
December 2014
November 2014
October 2014
September 2014
August 2014
July 2014
June 2014
May 2014
April 2014
March 2014
February 2014
January 2014
December 2013
November 2013
October 2013
September 2013
August 2013
July 2013
June 2013
May 2013
April 2013
March 2013
February 2013
January 2013
December 2012
November 2012
October 2012
September 2012
August 2012
July 2012
June 2012
May 2012
April 2012
March 2012
February 2012
January 2012
December 2011
November 2011
October 2011
September 2011
August 2011
July 2011
June 2011
May 2011
April 2011
March 2011
February 2011
January 2011
December 2010
November 2010
October 2010
September 2010
August 2010
July 2010
June 2010
May 2010
April 2010
March 2010
February 2010
January 2010
December 2009
November 2009
October 2009
September 2009
August 2009
July 2009
June 2009
May 2009
April 2009
March 2009
February 2009
January 2009
December 2008
November 2008
October 2008
September 2008
August 2008
July 2008
June 2008
May 2008
April 2008
March 2008
February 2008
January 2008
December 2007
November 2007
October 2007
September 2007
August 2007
July 2007
June 2007
May 2007
April 2007
March 2007
February 2007
January 2007
December 2006
November 2006
October 2006
September 2006
August 2006
July 2006
June 2006
May 2006
April 2006
March 2006
February 2006
January 2006
December 2005
November 2005
October 2005
September 2005
August 2005
July 2005
June 2005
May 2005
April 2005
March 2005
February 2005
January 2005
December 2004
November 2004
October 2004
September 2004
August 2004
July 2004
June 2004
May 2004
April 2004
March 2004
February 2004
January 2004
December 2003
November 2003
October 2003
September 2003
August 2003
July 2003
June 2003
May 2003
April 2003
March 2003
February 2003
January 2003

ATOM RSS1 RSS2



LISTSERV.LOC.GOV

CataList Email List Search Powered by the LISTSERV Email List Manager