With "just say no" the dictum for storage buying, IDC has estimated that total worldwide spending on external disk storage systems slumped to $13.3bn last year, down 24% on 2001.

That marks the second year in which disk sales have fallen heavily. In 2001, IDC now estimates that they fell by 21% - up on an earlier estimate of an 18% fall that year.

According to IDC, the rule for storage administrators has become "just say no to new capacity, and be more cost conscious when investing in other solutions for boosting storage utilization." The only good news is that according to IDC this will not last forever, and that between 2002 and 2006 external storage disk spending will show a CAGR of 1.1%

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