Linked by theosib on Sun 14th Feb 2010 10:45 UTC
Linux

Recently, I bought a pair of those new Western Digital Caviar Green drives. These new drives represent a transitional point from 512-byte sectors to 4096-byte sectors. A number of articles have been published recently about this, explaining the benefits and some of the challenges that we'll be facing during this transition. Reportedly, Linux should unaffected by some of the pitfalls of this transition, but my own experimentation has shown that Linux is just as vulnerable to the potential performance impact as Windows XP. Despite this issue being known about for a long time, basic Linux tools for partitioning and formatting drives have not caught up.

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RE: Alter your output buffer size
by smashIt on Sun 14th Feb 2010 15:22 UTC in reply to "Alter your output buffer size"
smashIt
Member since:
2005-07-06

So using cp is about as braindead as rm -rf /* for testing disk io. Its all about the block size that's read/written which in the case of cp is 1 character at a time.


it's the duty of the blockdevice-driver and/or the filesystem to collect several such manipulations before writing them to the disk

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