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: Comment by Kroc
by aaronb on Sun 14th Feb 2010 12:16 UTC in reply to "Comment by Kroc"
aaronb
Member since:
2005-07-06

Indeed an excellent article!

I think it would happen in all 4K sector drives regardless of size. If you started at LBA 63, the drive would be forced to update 2 4K sectors because the virtual sectors would lay across 2 physical sectors.

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Edited 2010-02-14 12:20 UTC

Reply Parent Score: 2

RE[2]: Comment by Kroc
by Kroc on Sun 14th Feb 2010 12:27 in reply to "RE: Comment by Kroc"
Kroc Member since:
2005-11-10

Reading the Aandtech article, it appears intended for 1TB+ drives, but as you say, it could apply to drives of any size if WD decided to adopt it across the board.

Reply Parent Score: 1

RE[2]: Comment by Kroc
by f0dder on Sun 14th Feb 2010 14:09 in reply to "RE: Comment by Kroc"
f0dder Member since:
2009-08-05

Hm, how is LBA addresses specified exactly?

I thought it was specified as multiples of drive sector size, in which case addressing via LBA should always be aligned - but is it in reality always a multiple of 512?

Is there a difference between how LBAs in the MBR are interpreted, and how ATAPI interprets LBAs?

Reply Parent Score: 1

RE[3]: Comment by Kroc
by f0dder on Sun 14th Feb 2010 14:21 in reply to "RE[2]: Comment by Kroc"
f0dder Member since:
2009-08-05

...but perhapse the 4k-sector WD drives are currently running in 512b-sector emulation mode? That would at least explain the "LBA weirdness" ;)

Reply Parent Score: 1