[MCN-L] digital media migration
I think it is much better to migrate to external hard drives (rather using CDs/DVDs) or massive storage. Depending on how much space you need, 1TB external hard disk costs less than $200. Rather than trusting the failure rate of massive storage (usually expensive), I would rather have multiple copies of data over cheap hard disks/servers. (Thinking about how Google built its clustered PC). Yan -Original Message- From: mcn-l-boun...@mcn.edu on behalf of Leslie Johnston Sent: Fri 10/17/2008 8:14 PM To: mcn-l at mcn.edu Subject: [MCN-L] digital media migration All, I'd be interested in hearing from anyone who has recently taken on a media migration project, e.g., retrieving legacy digitization output files from data CDs and DVDs, external hard drives, etc., for transfer to live disk and/or tape. I'm particularly interested in what sort of transfer stations other institutions have built for this purpose. I do not yet have an exhaustive inventory of what media we might be working with, but we suspect it's predominantly CDs burned over a 15 year period. The formats are primarily image files, although there are of course audio, video, PDF, and text files as well. Leslie -- Leslie Johnston Digital Media Project Coordinator Office of Strategic Initiatives Library of Congress 202-707-2801 lesliej at loc.gov ___ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://toronto.mediatrope.com/mailman/listinfo/mcn-l
[MCN-L] Archive materials - image sizes?
Perian, Regarding scanning dpi, check the de facto best practices published by National Archives. http://www.archives.gov/research/arc/digitizing-archival-materials.html It covers all the materials and provides an easy-to-use guidelines (page 52 -58). The scanning quality can be varied regarding materials and size. If your institution is capable, you might consider using JPEG2000, instead of TIFF. Yan Han Systems Librarian The University of Arizona Libraries -Original Message- From: mcn-l-bounces at mcn.edu [mailto:mcn-l-boun...@mcn.edu] On Behalf Of Potts, Megan H. Sent: Tuesday, January 08, 2008 9:34 AM To: Museum Computer Network Listserv Subject: Re: [MCN-L] Archive materials - image sizes? Hi Perian, I would recommend scanning at 600 dpi if you can afford it. It's best to scan only once, and at the highest quality you can. That way, your images are 'use neutral,' meaning they can be used and re-used for a variety of purposes. I prefer master images of archival documents to be 8-bit grayscale or 24-bit color and 600 dpi, because these settings are more able to capture detail in deteriorating, faded, or soiled materials, not to mention messy handwriting! Keep the 600 dpi TIFFs as archival copies, and then make 300 dpi JPEG derivatives as needed. I hope this helps! Megan Potts Digital Asset Specialist Corning Museum of Glass pottsmh at cmog.org -Original Message- From: Perian Sully [mailto:psu...@magnes.org] Sent: Tuesday, January 08, 2008 11:24 AM To: Museum Computer Network Listserv Subject: [MCN-L] Archive materials - image sizes? Hi all: We're currently having a debate about the appropriate scanned image sizes for archival documents. Our scanner doesn't scan into RAW, so we're batting back and forth whether to save the master TIFFs as 600 or 300 dpi. On the 300 side: 1) many of our archival materials were already scanned at 300 dpi (that being the original size I designated, but we've a long way to go yet) 2) the majority of our reproduction requests are for 300 dpi JPG 3) storage space concerns 4) archive materials are mostly documents and don't necessarily need 600 dpi treatment 5) since the documents aren't precious like the 3D materials and photographs, we can go back and rescan if we really need a 600 dpi JPG (ie. handling concerns aren't as great) On the 600 side: 1) scan once and be done with it 2) we do sometimes receive 600 dpi JPG requests 3) storage is cheap 4) make sure the master TIFF is as high as quality as possible, since we don't have RAW to fall back upon We're also thinking about scanning the documents at 300 dpi, and photographs and 3D materials in 600. What do other institutions do? Any best practices we should fall back upon here? Thanks in advance! Perian Sully Collection Information and New Media Coordinator Judah L. Magnes Museum 2911 Russell St. Berkeley, CA 94705 510-549-6950 x 335 http://www.magnes.org Contributor, http://www.musematic.org ___ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://toronto.mediatrope.com/mailman/listinfo/mcn-l ___ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://toronto.mediatrope.com/mailman/listinfo/mcn-l
[MCN-L] DVD's (5 year lifetime true?)
DVD/CDs are never good choices for preservation. See the following research In 2002, National Archives and Records Administration (NARA) directed a study of high density magnetic tapes life expectancy and revealed tapes can have a life expectancy of 100 years. ( http://www.archives.gov/research/electronic-records/magnetic-media-study .pdf ) The Library of Congress completed an unpublished report to study prerecorded compact discs (CD-ROMs) (citation). Both the National Institute of Standards and Technology (NIST) in 2004 (http://www.itl.nist.gov/div895/gipwg/StabilityStudy.pdf ) and Canadian Conservation Institute in 2005 published reports of life expectancies of recordable CDs (CD-Rs), rewriteable CDs (CD-RWs), and recordable DVD (DVD-Rs). There is a lot of uncertainty about the stability and longevity of optical disc and magnetic tapes. Studies shows that the stability of the optical media varied depending on the type of disc and the type of metal reflective layer used (Phthalocyanine dye is the best). All the studies show that higher deterioration for optial and magentic media, when exposure to high temperature and humidity condition My personal experience with DVDs is not a good one. 2 of 34 DVDs I received from Vendor for digitization went bad after receiving them. In addition, I do not think 2 copies are enough. We maintain at least 4 copies. Yan Han Systems Librarian The University of Arizona Libraries -Original Message- From: mcn-l-bounces at mcn.edu [mailto:mcn-l-boun...@mcn.edu] On Behalf Of Paul Marty Sent: Monday, February 12, 2007 9:51 AM To: Museum Computer Network Listserv Subject: Re: [MCN-L] DVD's (5 year lifetime true?) I would like to second Ari's point as well. There is almost no reason to use optical media for storage anymore. Go with the live RAID storage. If you cannot afford that, you can buy several external HDs for pennies a GB. The important point is to keep your data live. If you are storing your digital images on DVD, you are as good as throwing them away -- not because of their life-span, but because of the difficulty of keeping up with future data migration needs. Best, --Paul -- Paul F. Marty, Ph.D. (marty at fsu.edu) Assistant Professor, College of Information Florida State University, Tallahassee FL 32306-2100 http://info.fsu.edu/~pmarty On Feb 12, 2007, at 10:43 AM, Jeffrey Evans wrote: Susan, Yes, media can fail anytime so it is always a good idea to have two copies (preferably on two types of media.) Lifespan beyond 10 years is pointless anyway because you will most likely want to take advantage of bigger and speedier and cheaper storage devices. Don't sweat it, keep moving. JEFF Jeffrey Evans Digital Imaging Specialist Princeton University Art Museum (609) 258-8579 On 2/12/07 10:18 AM, Ari Davidow aridavidow at gmail.com wrote: There is _no_ assured lifetime for optical media (DVD, CD). There are claims that archival quality media last for 100 years. There is also experiential evidence that this is not so. Optical media may fail catastrophically at any time (although the odds are that a given platter will last for many years). If you use optical media for archival purposes, you need to be created multiple copies, and also need a fairly rigorous program to test each copy regularly (at least once a year) to look for degradation. Faced with this headache, we have opted for live RAID storage, with additional off-site live storage--we are currently looking at Amazon's S3, as well as at a newer service, carbonite.com. Ultimately, we hope to work with a few geographically-distributed partners to back up each other's work, but don't yet feel that we have the experience or knowledge to be confident that we're ready to do that. ari On 2/12/07, Susan Fishman-Armstrong sfishman at westga.edu wrote: A couple of conservation questions: Our laboratory director came to me last week. He is starting to digitize his old maps on DVDs. He ran across some information that said that the lifetime of DVDs is only 5 years. Is that true? If so, what is the estimated lifespan of the gold plated DVDs? Finally, is the lifespan of DVDs shorter than CDs? Thanks, Susan + Susan Fishman-Armstrong Laboratory Coordinator Antonio J. Waring, Jr. Archaeological Laboratory University of West Georgia Carrollton, GA 30118 678-839-6303 (office) 678-839-6306 (fax) www.westga.edu/~ajwlab/ -Original Message- From: mcn-l-bounces at mcn.edu [mailto:mcn-l-bounces at mcn.edu] On Behalf Of Amalyah Keshet Sent: Sunday, February 11, 2007 3:05 AM To: mcn-l at mcn.edu Subject: [MCN-L] IP SIG: Copyright at the Whitney: the Oldenburg-PicassoExhibit Interesting post at : http://wendy.seltzer.org/blog/ Copyright at the Whitney: the Oldenburg-Picasso Exhibit It goes without saying that I can't go anywhere without seeing copyright issues
Re: archival storage of CDs
Why do you want to use CDs to store images. The maximum size of a CD is 700 MB, only good for a few digital images. We use hard drives only. (Forget about DVDs,they are not good for long-term storage). -Original Message- From: Jansonius, Remko (Vizcaya) [mailto:remko.janson...@vizcayamuseum.org] Sent: 2005-12-30 (ζζδΊ) 8:18 To: mcn-l@mcn.edu Cc: Subject:archival storage of CDs After a year on the job I have collected loads of digital images - scanned, shot, donated. It's time to put the master files in storage. Is there a general consensus on what materials to use? What type of CDs? Is there a specific pro or con to use CD envelops (compacter) or jewel boxes (more rigid)? Does anyone have good experiences with specific CD drawers/boxes/cabinets? Is there anything I am overlooking here? Any and all comments are appreciated! ... and a good new year to all! Remko Jansonius Collections and Archives Manager Vizcaya Museum Gardens 3251 South Miami Avenue Miami, FL 33129 t: 305-860-8433 f: 305-250-9117 www.vizcayamuseum.org miamidade.gov Delivering Excellence Every Day Miami-Dade County is a public entity, subject to Chapter 119 of the Florida Statutes concerning public records. E-mail messages and their attachments are covered under such laws and thus subject to disclosure. All e-mail sent to and received at this address is captured by Miami-Dade County servers and kept as a public record. --- You are currently subscribed to mcn_mcn-l as: h...@u.library.arizona.edu To unsubscribe send a blank email to leave-mcn_mcn-l-12800...@listserver.americaneagle.com --- You are currently subscribed to mcn_mcn-l as: rlancefi...@mail.wesleyan.edu To unsubscribe send a blank email to leave-mcn_mcn-l-12800...@listserver.americaneagle.com
Re: SPECTRUM metadata material
Here is the link http://www.mda.org.uk/spectrum.htm SPECTRUM is used by UK museums. I am willing to buy one, but at least I want to look at the material before I buy. Yan -Original Message- From: Gordon McKenna [mailto:gor...@mda.org.uk] Sent: Wednesday, December 03, 2003 3:47 AM To: mcn_mc...@listserver.americaneagle.com Subject: Re: SPECTRUM metadata material Han, Yan wrote: Does anyone know where the SPECTRUM metadata material available online? The only place I can find is its official website. I have to buy the book to look at it. I'm not sure what exactly you mean by 'metadata material'? Gordon. *** Gordon McKenna e-mail: gor...@mda.org.uk mda The Spectrum Building, The Michael Young Centre Purbeck Road Tel:+44 1223 415760 Cambridge CB2 2PD, UKFax:+44 1223 415960 Supporting the management and use of collections Visit our Prototype Portal - Your First Stop for Information http://www.casportal.org.uk *** http://www.mda.org.uk/ --- You are currently subscribed to mcn_mcn-l as: h...@u.library.arizona.edu To unsubscribe send a blank email to leave-mcn_mcn-l-12800...@listserver.americaneagle.com --- You are currently subscribed to mcn_mcn-l as: rlancefi...@mail.wesleyan.edu To unsubscribe send a blank email to leave-mcn_mcn-l-12800...@listserver.americaneagle.com
SPECTRUM metadata material
Does anyone know where the SPECTRUM metadata material available online? The only place I can find is its official website. I have to buy the book to look at it. Thanks, Yan --- You are currently subscribed to mcn_mcn-l as: rlancefi...@mail.wesleyan.edu To unsubscribe send a blank email to leave-mcn_mcn-l-12800...@listserver.americaneagle.com
[MCN-L] TIFF JPEG conversion program
I am looking for an open source API that can convert TIFF files to JPEG so that I can integrate it with our current system. Anyone know about this? Thanks, Yan Han University of Arizona Libraries
[MCN-L] compressing TIFFs for museum collection images
For TIFF in B/W, you can use CCITT group4 to do lossless compression. The alg is very simple and I believe it is part of TIFF 6 standard. For TIFF in grayscale and color, the common approach is not to compress, but you can try to compress them in LZW, a well-known compression alg (see http://en.wikipedia.org/wiki/LZW). However, I believe that you have to monitor the file format very closely. Yan Han University of Arizona libraries -Original Message- From: mcn-l-bounces at mcn.edu [mailto:mcn-l-boun...@mcn.edu] On Behalf Of Howard Brainen Sent: Wednesday, January 31, 2007 2:24 PM To: 'Museum Computer Network Listserv' Subject: Re: [MCN-L] compressing TIFFs for museum collection images There is a real question about whether or not you'll be able to read those compressed TIFF's off in the future. That's why the best practice is to store them uncompressed. Storage is 1/2 the price it was 18 months ago and that trend will continue into the future. Howard Brainen Digital Imaging Consultant TWO CAT DIGITAL INC. 14719 Catalina Street San Leandro, CA 94577 USA 510-940-2670 x201 www.twocatdigital.com/consulting.html blog: www.digitalenabler.blogspot.com -Original Message- From: mcn-l-bounces at mcn.edu [mailto:mcn-l-bounces at mcn.edu] On Behalf Of Friscia, Jeanne Sent: Wednesday, January 31, 2007 1:08 PM To: Museum Computer Network Listserv Subject: [MCN-L] compressing TIFFs for museum collection images We at SFMOMA are on the heels of ingesting our permanent collection high resolution TIF files into our DAMS system and faced with the issue of whether or not to use compressed tiffs. While we know that they represent a lossless standard, we wonder if anyone has thoughts on issues that may arise concerning corruption, preservation, etc. In other words, is this really a good idea and are there cons to the pros of saving storage space? Thanks, Jeanne Friscia Jeanne Friscia Visual Resources Specialist Collections Information Access Department SFMOMA (415) 357-4103 The information contained in this electronic mail message (including any attachments) is confidential information that may be covered by the Electronic Communications Privacy Act, 18 USC Sections 2510-2521, intended only for the use of the individual or entity named above, and may be privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication, or the taking of any action based on it, is strictly prohibited. If you have received this communication in error, please immediately notify me and delete the original message. Thank you ___ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://toronto.mediatrope.com/mailman/listinfo/mcn-l ___ You are currently subscribed to mcn-l, the listserv of the Museum Computer Network (http://www.mcn.edu) To post to this list, send messages to: mcn-l at mcn.edu To unsubscribe or change mcn-l delivery options visit: http://toronto.mediatrope.com/mailman/listinfo/mcn-l
