SLES 9 vs SLES 11 hard drive cache read timings are diffrent

 
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Operating Systems Linux SuSE SLES 9 vs SLES 11 hard drive cache read timings are diffrent
# 1  
Old 10-27-2010
SLES 9 vs SLES 11 hard drive cache read timings are diffrent

Can anyone give me a little clue on why the hard drive cache read timings on sles 9 is better then sles 11? The same hardware was used in both test. I even deleted the ata_generic module from initrd.

The speed difference is 10MB vs 5 MB

Thanks
# 2  
Old 11-10-2010
That's a significant difference all right!

What module is it using to read the drive in either? Is there any difference in readahead settings?
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