EVA Max IO Transfer Size

The HP EVA storage is optimized to perform at 128KB Max IO transfer size or less. If the host operating system uses large block size, it may reduce the storage performance. For example, ESXi use 32MB by default. To tune the value, you can go to host software advanced settings.

Reference:

http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/mostViewedDisplay/?javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken&javax.portlet.prp_efb5c0793523e51970c8fa22b053ce01=wsrp-navigationalState%3DdocId%253Dmmr_kc-0101662-8%257CdocLocale%253Dzh_HK&javax.portlet.tpst=efb5c0793523e51970c8fa22b053ce01&sp4ts.oid=436460&ac.admitted=1385425196533.876444892.199480143

http://h20566.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c02518189-4%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1003469