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Are you seeing issues other than the error, I know the first error generally can be ignored unless you are seeing problems, how are the links that connect to to the iscsi looking?
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I am going to go on a assumption here that you left the datastore name the default of &quot;datastore1&quot; when the host was setup if this was the case this may be from your local storage. Are your VM's running on a SAN or local storage?<br />
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The following KB will show you how to identify disk in VMware: <a href="https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014953" rel="ugc nofollow">https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014953</a>
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See Error messages on a VoIP Host below. &nbsp;These were gotten by going into vSphere Client &gt;&nbsp; Clicking on the IP Address of the host &gt;&nbsp;Going to the Event Tab. &nbsp;<b>Question: &nbsp;How to determine if this is an issue with the chasis' internal storage or an external SAN?</b><br />
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Device naa.600605b003825740162fe7<wbr />352adc9915<wbr /> performance has deteriorated. I/O latency increased from average value of 21912 microseconds to 2150722 microseconds.<br />
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Lost access to volume 4e9d45e6-ce6d3808-cd05-001<wbr />018a3a4a2 (datastore1) due to connectivity issues. Recovery attempt is in progress and outcome will be reported shortly.<br />
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Successfully restored access to volume 4e9d45e6-ce6d3808-cd05-001<wbr />018a3a4a2 (datastore1) following connectivity issues.
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See Error messages on a VoIP Host below.  These were gotten by going into vSphere Client >  Clicking on the IP Address of the host > Going to the Event Tab.  Question:  How to determine if this is an issue with the chasis' internal storage or an external SAN?

Device naa.600605b003825740162fe7352adc9915 performance has deteriorated. I/O latency increased from average value of 21912 microseconds to 2150722 microseconds.

Lost access to volume 4e9d45e6-ce6d3808-cd05-001018a3a4a2 (datastore1) due to connectivity issues. Recovery attempt is in progress and outcome will be reported shortly.

Successfully restored access to volume 4e9d45e6-ce6d3808-cd05-001018a3a4a2 (datastore1) following connectivity issues.

VoIP Issue/Errors

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

IP Telephony

Telecommunication occurs when the exchange of information between two or more entities (communication) includes the use of technology. Communication technology uses channels to transmit information (as electrical signals), either over a physical medium (such as signal cables), or in the form of electromagnetic waves. The word is often used in its plural form, telecommunications, because it involves many different technologies.

Telecommunications

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.