Physical Media WG Update November 30, 2006

2 Fall 2006 WG Status Initial technology plan Use Cases Decision Matrix Media Testing NMSU Website Physical Media WG Wiki

3 Media Plan Understand PDS requirements for physical media –Define the usage of physical media within PDS –Address PDS media issues for the following functions Delivery to PDS Delivery to NSSDC Delivery to Users Preservation and storage Identify reliable media –Test existing media samples within PDS –Understand the lifespan of the media for preservation and storage Define Media Physical Recommendation Matrix for PDS Understand Emerging Physical Media Trends Maintain website on –Recommendations (Management Council website) –Experiences/Technical Detail (Engineering Node website) Work with other WGs to develop mechanisms for verification

4 What is PDS doing with Physical Media?* UC-1: PDS Node Preservation UC-2: Data Provider Production and Transfer to PDS UC-3: Transfer to NSSDC UC-4: Transfer to Data Consumer UC-5: Local Storage UC-6: Verification UC-7: Migration UC-8: Investigation * PDS Physical Media Use Cases Document (DRAFT-Sept 25, 2006)

5 Decision Matrix for Physical Media Define viability of physical media choices across the critical PDS usage scenarios: –Delivery of data to PDS –Delivery of data to users –Delivery of data to NSSDC –PDS local archiving Define verification and migration schedule based on media type Identify emerging/declining trends Example matrix developed for Data Movement IEEE/NASA Mass Storage Systems presentation

6 DVD/CD Testing Conduct joint test at NIST and within PDS to validate the following: –Use NIST high-end testing equipment to verify readability of PDS CD/DVD volumes –Use PDS COTS testing equipment to verify readability of PDS CD/DVD volumes Compare results of tests –Are there trends? –Can we identify reliability concerns with types of media/recorders? –How do PDS methods compare to NIST methods for verification?

7 DVD/CD Testing - Media 1 CD - USGS: CD_PA APR-00 2 CD - GEO: USA_NASA_PDS_MG_ JUN-97 3 CD - USGS: USA_NASA_PDS_CL_ DVD-R - SBN: NIEROS_ JAN-04 5 DVD-R - USGS: USA_NASA_PDS_DMGSC_ APR-03 6 DVD-R - USGS: USA_NASA_PDS_DMGSC_ APR-03 7 DVD-R - USGS: USA_NASA_PDS_DMGSC_ OCT-03 8 DVD-R - USGS: USA_NASA_PDS_DMGSC_ CT-04 9 DVD-R - USGS: USA_NASA_PDS_DMGSC_ OCT CD - SDDPT: MGN SAR-EDR (MGN_0017) 06-OCT CD - SDDPT: MGN SAR-EDR (MGN_0038) 22-OCT CD - SDDPT: VIKING LANDER (VL_1001) 03-MAY CD - SDDPT: VIKING ORBITER (VO_ JUN DVD-R - SBN: USA_NASA_PDS_NICRU1_ SEP DVD+R - USGS: LO3_HIGH_RES_V1 29-JUN DVD-R - PPI: MGN_ MAR CD - PPI: USA_NASA_PDS_VG_ JAN DVD-R - PPI: USA_NASA_PDS_DMGSM_2001 UNK (UNREADABLE) 19 DVD-R - PPI: USA_NASA_PDS_CORPWS_ APR CD - PPI: GOMA_ DEC CD - PPI: HAL_ SEP-00

8 NIST – DVD/CD Summary Received results from NIST last week Need time to digest the results, but they seem to point to degradation –Need to understand the rate PPI has offered to run its own tests. Need to compare the results.

9 NMSU Website Details of Physical Media results uploaded to NMSU MC website –PDS Physical Media Survey Summary ( ) –Physical Media Resources (by MMartin) General Reference CD and DVD Organizations High density DVD formats CD and DVD Tips Vendors and Resources Tools and Publications Media Information and Evaluations NMSU MC website: – username: pdsmc – password: council

10 Next Steps Testing –Perform PPI tests –Consider testing PDS NSSDC Develop Physical Media Decision Matrix –Integrate results from other government efforts –Provide recommendation on use of different physical media technologies Develop verification plan –Develop recommendations for supporting PDS archive integrity policy –Support data integrity development Report back to the MC