UEK I/O Transfer Size Issue With Multipathing

(Doc ID 1634290.1)

Last updated on MARCH 14, 2014

Applies to:

Linux OS - Version Oracle Linux 6.1 with Unbreakable Enterprise Kernel [2.6.39] and later


 The value held in max_sectors_kb corresponds to the IO transfer size for each sd* disk in Linux.  This value usually defaults to 512, but can be changed up to the maximum value held in max_hw_sectors_kb.  Unfortunately, in multipath code will not expand above 512, as per below:



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