Inside System Storage -- by Tony Pearson

Tony Pearson Tony Pearson is a Master Inventor and Senior IT Specialist for the IBM System Storage product line at the IBM Executive Briefing Center in Tucson Arizona, and featured contributor to IBM's developerWorks. In 2011, Tony celebrated his 25th year anniversary with IBM Storage on the same day as the IBM's Centennial. He is author of the Inside System Storage series of books. This blog is for the open exchange of ideas relating to storage and storage networking hardware, software and services. You can also follow him on Twitter @az990tony.
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Comments (5)

1 localhost commented Trackback

Do you have any response the to your fellow blogger?

2 localhost commented Trackback

Hu also fails to mention the removeability factor of tape libraries. Soon we will have 1TB+ media cartridges - and a single media cartridge consumes 0 power and gives off 0 CO2...

3 localhost commented Trackback

Tony the general notion that a VTL + Dedupe would draw less power than a traditional tape library is laughable and hence the need for a good screen protector privacy filter like those from 3M among others. However, as is often the case, say you have a tape library with 20 tape drives that are generally in use, and then compare to a small dedupe VTL with say only 12 SATA drives, sure its possible with some creative configuration to make a VTL + dedupe draw less power than a tape library however is it an apples to apples comparison, hardly not! Take a look at a given raw capacity size and make a baseline comparison for power, cooling, floor-space, environmental (PCFE) impact of VTLs, tape libraries, MAID and traditional disk storage systems that not only factor in storage (raw) capacity, also performance when it comes time to store or retrieve data and the multi-dimension picture becomes rather interesting and puts the different tiers of storage more into perspective. <div>&nbsp;</div> For example, check out the industry trends and perspectives report "Energy Savings Without Performance Compromise" at http://www.storageio.com/Reports/StorageIO_WP_Jan02_2008.pdf as an example (I need to update and expand the charts to add some additional solutions) of how effective tape libraries can be compared to even MAID and MAID 2.0 solutions with regard to addressing PCFE issues while supporting various service levels including performance, availability, capacity and energy use.<div>&nbsp;</div> Now granted, the de-dupers will cry fowl as I would expect them to in that the baseline approach does not show effective capacity improvements when the de-dupe is applied to their solutions.<div>&nbsp;</div> Ok, fair-enough, however first show the base-line without de-dupe or compression, then, show the same solutions with de-dupe and/or compression applied for an apples to apples, oranges to oranges comparison vs. the more normal mode we see which is apples to oranges in forced mis-match scenarios.<div>&nbsp;</div> CheersGreg Schulz – www.storageio.com and www.greendatastorage.com

4 localhost commented Trackback

Dave, Taylor,Thanks for the support. I agree, many people are approaching this problem of energy consumption from the wrong angle.<div>&nbsp;</div> Greg,Thanks for the 8-page whitepaper. Chart 3 looks very convincing. I did the math: a 6-drive frame on the IBM TS3500 tape library draws the same power as only 37 SATA drives, and that's if both are running continuously 24 hours a day, so you are correct that technically a small VTL could draw less electricity than a large tape library.<div>&nbsp;</div> -- Tony

5 localhost commented Trackback

Intersting question...does anyone know what the carbon footprint of an LTO tape cartridge is? What isn't plastic is melted, cast and/or milled metal. Undoubteldy less than a SATA drive, but I'm curious to know the comparison.<div>&nbsp;</div>

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