iSCSi establishment always dropped, why?

This is using MS Windows 2008 r2 server. The iSCSI Initiator has been configured to map to a iSCSI target from Synology NAS. There are altogether 3 iSCSI targets available from the NAS, and each of these target connected to one server. For example, serverA connect to iSCSI A, and so on. However, the rest of the 2 servers do not have any iSCSI dropping issue, but this server. The situation is, this iSCSI establishment always found "missing" once per week. But, after manually configured with CHAP secret, the iSCSI will connect in no time, why?

I am thinking to create a daily routine job to disconnect and re-connect this iSCSC target, will it be a good idea?

Thanks in advance.
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MichaelBalackAsked:
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Ganesh Kumar ASr Infrastructure SpecialistCommented:
Here is the article to configure iscsi verify if all the steps are covered : http://www.experts-exchange.com/articles/11404/HOWTO-iSCSI-with-Multi-Path-in-a-Windows-Server-Environment.html
MichaelBalackAuthor Commented:
Hi Ginesh,

Give me something to go through...
Ganesh Kumar ASr Infrastructure SpecialistCommented:

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MichaelBalackAuthor Commented:
Thanks expert - Ganesh on providing article on how the iSCSI work in depth. I really appreciated and the iSCSI establishment always broke issue eventually solved.
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Windows Server 2008

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