[CentOS] Strangely slow disk

fred smith fredex at fcshome.stoneham.ma.us
Sun Dec 4 19:08:14 UTC 2011


On Sun, Dec 04, 2011 at 10:24:00PM +0800, Ho Chaw Ming wrote:
> Check your bios, and make sure that you did not have IDE mode enabled and
> AHCI is selected .

Also, is this one of the "Green" series of WD disks? Those have 
a 4KB sector size, not the old/traditional 512B sector size. This has
performance ramifications in that you must have partitions begin on
a sector boundary or performance goes to the dogs. There are a number
of articles about it on various geek sites, sorry I can't point you
to one offhand.


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