UEK I/O Transfer Size Issue With Multipathing
(Doc ID 1634290.1)
Last updated on FEBRUARY 11, 2019
Applies to:Linux OS - Version Oracle Linux 6.1 with Unbreakable Enterprise Kernel [2.6.39] and later
Oracle Cloud Infrastructure - Version N/A 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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