On Mon, 14 May 2007 13:35:24 -0500, Mark Zelden wrote: >An interesting article on this subject: > >Tape and Disk Costs - What It really Costs to Power the Equipment >http://www.clipper.com/research/TCG2007014.pdf > >From the article: > >Key Findings >1. SATA disk system has nearly 26 times higher energy costs than tape system. >2. SATA disk system acquisition costs about 6.5 times the cost of automated >tape system. >3. Assuming electrical rates remain same, the cost to acquire, power and >cool disk systems for five years is almost 8 times the cost to acquire, >power, and cool automated tape systems. >4. The cost to power and cool equipment must be part of the TCO. >
I listened to a webcast from Clipper talking about this same subject. It looks like an audio presentation of this same paper. The power costs for the disk array in the paper are in line with what the webcast stated. I'm having a hard time finding a way to prove a $110K annual power bill. What I'm finding in my research is the cost to power a 3584 autmoated tape library is about 25% of what it takes to power a 17TB disk array. But what they said in the webcast is the tape library had annual power costs around $5K with the disk array at $110K. With 95% less power consumption relating to a $100K/year savings, I thought I was going to be buying an automated tape library. Reality is a lot different. Approximately 1.5KW for a 3584 vs approximately 5KW for a DS8100. Not that this isn't important, but the savings aren't as appealing as first presented. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
