 A shift in how data is logically arranged on hard drives will go into effect next year, boosting Windows 7 performance, but hurting Windows XP.
Windows 7, Vista users will be fine, but by 2011 XP users will take a performance hit on new drives
Last
month 65.5 percent of computers worldwide used Windows XP,
approximately 16.5 percent used Windows Vista, and 9
percent used Windows 7. Looking ahead to 2011, Windows XP
is likely to give up some market share, especially with a number of
corporate networks upgrading
to Windows 7. Still, Windows XP is likely to defy logic and
cling to substantial marketshare next year.
And that brings
about a thorny
and underpublicized problem. Windows Vista, Windows 7,
along with OS X Tiger, Leopard, Snow Leopard and versions of the
Linux kernel all support hard drives with a 4KB sectors.
Windows XP does not.
In 2011 all hard
drive makers have agreed to abide by an agreement ironed out by the
International Disk Drive Equipment
and Materials Association (Idema), which will dispose of the
older 512 byte block format and switch all drives to 4KB
blocks.
Does that mean the end of hard drives for
Windows XP, currently the world's top operating system? Not
quite. The Idema plan is gracious enough to call for the 4 KB
(4096 byte segment) to be aligned with the past 512 byte segment.
So Windows XP users can still buy new drives and use them.
That
said, there's a major catch performance-wise. In some cases
what took a single operation on older drives will take two operations
due to an emulation layer needed to allow Windows XP to treat the new
drive format like the old one. Overall, experts estimate users
will take a 10 percent performance hit.
Windows XP is
typically lauded
for its performance and certainly was a marvel of operating
system design by the time it hit SP3. However, the hard drive
switch should shift the performance balance in Windows 7's favor.
Using the larger block size, Windows 7 will feature eight times less
wasted space and twice as many bits-per-block devoted to error
correction. Overall this shift will improve the speed and
reliability of Windows 7, while reducing its power footprint.
Meanwhile Windows XP will hold steady in reliability, but will
perform worse both in speed and power consumption.
"Google fired a shot heard 'round the world, and now a second American company has answered the call to defend the rights of the Chinese people." -- Rep. Christopher H. Smith (R-N.J.)
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