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| Storage Facts, Figures, Estimates and Rules of Thumb |
| This table is compiled from a wide variety of sources and is intended to serve as planning guidelines for storage and data management planning activities. |
| Average annual digital storage demand rate (primary occurrence of data, all platforms) | 35-40% (2006-2008) |
| Amount of magnetic disk data stored on Unix, Windows and Linux systems WW (est.) | >90% |
| Average disk allocation levels for z/OS (eSeries mainframes using DFSMS suite) | 60-80% |
| Average disk allocation levels for iSeries (AS/400 servers) | 60-80% |
| Average disk allocation levels for Unix/Linux systems | 30-45% |
| Average magnetic disk allocation levels for Windows systems | 25-40% |
| Average annual disk drive demand increase | 35-50% (downward trend expected as recording limits begin to appear) |
| Average annual disk drive performance improvement (seek, latency and data rate) | <4% (mainly with data rate, as seek time improvement is minimal) |
| Increase in disk drive capacity per actuator since the first disk drive in 1956 | 200,000x (5MB to 1000 GB) |
| Increase in native tape cartridge capacity since the first tape cartridge in 1984 | 4,000x (200MB to 800 GB) |
| Average data center power consumption | 40 watts per square foot |
| Average power used per blade server rack | 15-30 kilowatts |
| Average cost to build a Tier 3 data center | $480 per square foot |
| Average non-mainframe server busy (% processor busy) | 25-40% |
| Average tape cartridge utilization levels for integrated virtual tape systems | 60-80% |
| Typical range of disk data managed per administrator (for non-mainframe systems –Windows, Unix, Linux) | 500GB – 10TB |
| Typical amount of disk data managed per administrator (z/OS, mainframe) | >50TB |
| Estimated range of automated tape data managed per administrator (all platforms) | 40TB to >1EB (varies widely based on library size) |
| Annual growth rate of unwanted e-mail message traffic | ~350% |
| Estimated percentage of SANs that are homogeneous ( the same operating system) | 70-75% (Mainframes, Unix and Windows systems only) |
| Percent of NAS deployed databases greater than 500GB (est.) | ~10% |
| Average number of spam e-mails delivered every 30 days | >3.65 billion |
| Average size of e-mail in 2007 (est.) | 650kb |
| Number of e-mails sent daily in 2006 (est.) | >35,000,000,000 (billion) |
| Percentage of customers retaining e-mail archives over 7 years | 9% |
| The size of WW wireless calls in PB | 2,300 |
| Percentage of all e-mail traffic that is unwanted | ~90% |
| Percent of companies citing employees as the most likely source of hacking | 77% |
| Percentage of US adults with more than 200GB of storage capacity | 10% (approximately 28 million) |
| Percentage of digital data stored on removable media (primarily magnetic tape) | ~80% |
| Percentage of digital data stored on mobile (portable) technologies | 50-60% |
| Number of new (1st round) data storage companies funded in 2000 | 92 |
| Number of new (1st round) data storage companies funded in 2006 | 2 |
| Total storage companies acquired in 2006 | 100 |
| Number of new small businesses created in the US in 2005 | 550,000 |
| Average revenues of InformationWeek 500 companies in 2006 | $9.776 B (was $12.47B in 2001) |
| Average IT budget of Information Week 500 as a percentage of revenue in 2006 | 3% (was 3.88% in 2001) |
| Average percentage of IT budget in the US spent on IT salaries and benefits | 32% |
| Average percentage of IT budget in the US spent on compliance | 5% |
| Number of mid-market firms in the US in 2005 (100-999 employees) | 93,876 |
| Percentage of IT jobs in businesses with fewer than 99 employees | 72% |
| Projected size of India’s IT services industry in 2010 | $60 B |
| Projected size of China’s IT services industry in 2006 | $8.9 B (est. cagr. 18.9%) |
| Percentage of businesses who take backup tapes offsite daily, weekly, and monthly? | Daily – 56%. Weekly -32%. Monthly - 4%. |
| Data selected from a variety of industry sources. |
| Compiled by: |
| Fred Moore, President |
| Horison Information Strategies http://www.horison.com |
| June 2007 |
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