Hello All Who can explain the difference between FMD and SAS handling sequential I/O? thanks. <a data-tag-text="FlashStorage" data-sign="#" class="user-content-hashtag" href="https://hitachi.connectedcommunity.org/search?s=tags%3A%22Flash Storage%22&executesearch=true" data-tag-key="b863eb19-9c98-4ba4-97b2-dbda220bcb84">#FlashStorage</a> <a data-tag-text="HitachiDataDirectorHDD" data-sign="#" class="user-content-hashtag" href="https://hitachi.connectedcommunity.org/search?s=tags%3A%22Hitachi Data Director HDD%22&executesearch=true" data-tag-key="cd5016bb-ad8b-44c0-836c-ecce46e23ee4">#HitachiDataDirectorHDD</a>

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Sequential I/O in FMD and SAS HDD

wanjong Kim posted 05-23-2019 05:08

Hello All

Who can explain the difference between FMD and SAS handling sequential I/O?

thanks.

#FlashStorage
#HitachiDataDirectorHDD

Libo Jiang posted 05-23-2019 14:29

Hi Wanjong,

This could be low cache hit issue. Please check "Cache Hit(%)" on the LUNs you are testing. For example, from Storage Navigator, you can monitor "Cache Hit(%)" during the tests.

cache_hit_graph

Hope this helps.

Libo

Flash Storage​

Sequential I/O in FMD and SAS HDD

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