Do disk based VTLs draw less power than tape?
The tape is dead debates rage on as they have for a decades which make for good press and discussion or debate during slow times, similar to coverage of what Britney Spears or Paris Hilton are or are not wearing.
In the on-going debates and Greenwashing of what technology or vendor is greener to prevent global warming, some recent tape is dead flare-ups have occurred including one hinting that tape libraries can draw more power than a disk based VTL with de-dupe are discussed over on Tony Pearson of IBM fame blog site as well as Beth Pariseau of TechTarget StorageSoup site. I posted some comments on those sites along along with a link to a StorageIO Industry Trends and Perspective report titled "Energy Savings without Performance Compromise" as an example (look for an updated version of the comparison charts in the report in the not so distant future). The report looks at how different storage tiers including on-line disk, MAID, MAID 2.0 and tape libraries vary to address different PCFE (power, cooling, floor-space, environment) issues while supporting various service levels including performance, availability, capacity and energy use.
Additional related material can be found at storageio dot com including the Industry Trends and Perspective Report Business "Benefits of Data Footprint Reduction� in general covering archiving, compression (on-line and off-line) along with de-duplication