iSCSI (ESXi) loss of storage connectivity

Similar Questions

• Need urgent help: loss of storage after rename of iSCSI target

  Hello guys,.

  I need help, I had the problem with one of my iSCSI targets with all virtual machines on it, this iSCSI target on the storage iomega NAS device, is suddenly the storage is no longer available, I tried to rename the 'VmwareStorage' to 'VmwareStorage1' iSCSI target, but his is more appropriate (his was visible on a vsphere servers) but now visible sound like a DOS partition, please help to recover to vsphere without losing any data and the virtual machines inside. Note that I use Vsphere 5.5. see attached photo:

  the selected one is 16-bit DOS > = 32 M, its must be VMFS, as all other stores, I don't want to not loose my vms, the company stops and I'm fired

  

  I fixed it... I followed this vmware kb

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalID=2046610

  Thank you vmware, linux thanks<>

  

  

• 5.0 to 5.5 with iSCSI ESXi ESXi

  I have some servers ESXi 5.0 with iSCSI configured for my storage. If I'm on 5.5 ESXi, should I reconfigure the iSCSI? If so, how differente different is the configuration? I know that we had to set up when we went from 4.x to 5.0 ESXi ESXi and the configuration options are very different. Is this the case with the new version?

  No, you stay within the same major version and it should work without any problems. ESX ESXi (i) 4-5 were important steps, they are smaller. Made this upgrade in environments of production before without any problem or reconfiguration.

• iSCSI as shared media storage?

  I was wondering if anyone had here a few thoughts about the use of iSCSI as shared media storage.

  I would use it via ethernet to my ready nas pro with two Gbit connections is associated with a single IP address.

  I know the obvious limitations in bandwidth by ethernet and the risk of data corruption when sharing, but I only use the same media on one PC at a time, so I guess that's not much more of a problem.

  Further recommendations on the idea of shared storage would be muc appreciated also.

  Thank you. :)

  Ulf

  iSCSI is ideal for this workflow. There are faster options now that are affordable compared to the Gbit and iSCSI units which have expansion slots supporting 10 Gbit Ethernet. Cards Intel 10 Gbps Ethernet are $380 for a single port cards and the Thecus 8 and the 16bay units take over some of the Intel 10 GB cards. NETGEAR has 10 Gbit Ethernet switches for $900. If this isn't an option now then 2port NAS/SAN unit will be fine. Don't expect much more then 75 to 100 Mbps even with load balancing. 10 Gbps also reduce access latency. Gbit will be a delay if try to change directly from shared storage.

  Eric

  ADK

• Windows Update 12/15/2010 causes a loss of internet connectivity

  After you perform the update 12-15 and rebooted the computer creates a loss of internet connectivity on our HP Pavilion (Windows 7). I confirmed this because I deleted updates and connectivity returns.

  While this loss of connection the network and sharing Center shows that it is connected to the network and to the internet.

  There were 10 updates total, for most updates of security, IE 8 1 update and an update of the malicious attack tool.

  I disabled updates automatic for the moment, however really puzzled by this and don't find any problems in the database about it.

  Ideas? Thank you!!

  Hi BillHarsh,

  You can manually download and install the updates one by one from the Microsoft Download Center & check if the problem persists.

  Reference: in the Windows network connection issues

  Hope the helps of information. Please post back and we do know.

  Concerning
  Joel S
  Microsoft Answers Support Engineer
  Visit our Microsoft answers feedback Forum and let us know what you think.

• Updates 2478658 KB and KB2518864 could not install and cause a loss of internet connectivity

  Hello

  Updates KB2478658 and KB2518864 cannot be installed in my SBS 2003 and caused a loss of internet connectivity.

  A while ago, I had a similar problem, i.e. do not install and loss of internet connectivity after you apply Windows Server 2003 SP2 on SBS. In this case, we have solved the problem with the support of a Customer Support person Microsoft, a service through which we paid.

  According to the suggestions that I found in the Microsoft Web sites, I managed to remove everything that was installed by the KB2478658 and KB2518864 updates and the reinstalled successfully. I did these manually because I don't have an internet connection.

  After you have reinstalled the above mentioned security updates, I repeated all the steps that led to the problem of the previous time. Among the steps taken, have been indicated in:

  Common problems of networking after you apply Windows Server 2003 SP2 on SBS

  http://blogs.technet.com/b/SBS/archive/2007/04/24/common-networking-issues-after-applying-Windows-Server-2003-SP2-on-SBS.aspx

  2. 948496 an update to turn off default SNP features is available for Windows Server 2003 and Small Business Server 2003-based computers

  http://support.Microsoft.com/default.aspx?scid=KB; EN-US; 948496

  Unfortunately, I was unable to restore connectivity to the internet this time.

  There is connection between the NETWORK card and router. I could ping the NIC IP address, but not that of the router (I get an "unreachable" message).

  I look forward to suggestions and recommendations to solve this problem. I have already paid once resolved a problem that was not directly caused by me and do not wish to do it again.

  Thanks in advance.

  JL

  Hi JL,.
   

  Your question of Windows is more complex than what is generally answered in the Microsoft Answers forums as it is related to a problem with small business server. It should be better in the Windows Server Forums of business.

  Please post your question in the Windows Small Business Server Forums.

• Loss of internet connection on windows Vista Enterprise edition

  Hello

  I have a very serious problem, started only last Monday, I was using my laptop to last more than three years and having a problem just last week about the loss of internet connection after an hour or two after restarting the laptop.

  I thought that a virus could have an effect on this, so last night I reinstalled the operating system, but it does not work too. I connect to the internet via an ethernet to a motorola modem cable, do not know how to solve this problem now.

  I searched through various sites and followed quite a few options but that did not help. Still have a problem, someone please answer as soon as POSSIBLE. I have a very important session the game and on Fri and it will be very costly if I can't then I would like to be back to normal as soon as POSSIBLE.

  Go to the website of the manufacturer of your Modem > make sure you have the latest Firmware in Vista for it.

  Go to the website of the manufacturer of your computer/notebook > drivers and downloads Section > key in your model number > look for it last network adapters Vista drivers > download/install the.

  The computer you are using now if you have an Internet connection with the other > download / save drivers > copy them into Flash Drive > transfer / install on another computer/laptop.

  http://Windows.Microsoft.com/en-us/Windows-Vista/troubleshoot-network-adapter-problems

  Troubleshoot network adapter problems to Microsoft link above.

  Try without commitment TCP/IPv6:

  If you still have internet connection probs, one thing to try is the separation of the TCP/IPv6 (which is done by going to network connection > right click > properties > it uncheck > OK.)

  http://digitalmediaphile.WordPress.com/IPv6-how-to-unbind-from-a-NIC-in-Windows-Vista/

  See you soon.

  Mick Murphy - Microsoft partner

• Windows 7. I recently had problems with loss of internet connection. When I have trouble Shooting, told me that impossible to find a driver.

  I have a desktop running Windows 7 PC.  I recently had problems with loss of internet connection.  When I have trouble Shooting, told me that impossible to find a driver.  The adapter does not appear in Device Manager.  Help!

  Hello

  Definitely looks like a problem with the network device. Check with sound
  Support, their books online, the drivers and ask in their forums (if any)
  on known problems. If there is a control of the device shipped with the system
  Manufacturer (manufacturer of motherboard for customized systems). If a device check separated
  with the support of its creator and other resources.

  You could also remove or disable the device and try a new add-on as one
  new card or device USD. None of those who are dear.

  I hope this helps.

  Rob Brown - Microsoft MVP<- profile="" -="" windows="" expert="" -="" consumer="" :="" bicycle=""><- mark="" twain="" said="" it="">

• How to display this window that lists all the devices of storage connected to my PC?

  How to display this window that lists all the devices of storage connected to my PC? It lists each device, how much space is used and how much is free? I sometimes open it by accident, but I can never find it when I'm looking for it.

  original title: storage devices

  Beginning

  Control Panel

  If you the small icons view do the following:

  Administration tools

  Computer management

  Storage

  Disk Managment

  If you have the category view do the following:

  System and security

  Administration tools

  Computer management

  Storage

  Disk management

• Anyone else experiencing the random loss of internet connection while using character animator?

  I seem to have a random loss of internet connection when performing character animator.

  Look into this further. It seems not related to the animation of character since today, it seems to happen randomly when running a simple browser. I think that maybe it's just my old router is about to die. I deleted my DNS cache and renewed my IP address and reset my router, so I hope that's all it took. Otherwise, it may be time for a new router.

• loss of recurring connection

  We see the loss of recurring connection between siebel and opa. When we launch takeover of siebel sometimes it gives FailedToLoadCaseError [cannot load the case ID:...]. When the user disconnects, and the newspaper and he is able to get to the screen of the takeover bid with no problems. This has been in the whole of the environment tests, Prod. Is there anyway we can fix this.

  From the looks of this trace big stack, it seems that there is a problem with the Siebel inbound web services. It is the web services provided by Siebel Web determinations calls to get the data and record sessions.

  You should check the URL you have provided in the siebel data file - adjust .properties to ensure he calls the expected URL. You can also consider using a tool like SOAP-ui, to manually test the inbound web services.

  Finally, its value having a look on the Siebel server logs to see if there is something out there.

• Target iscsi ESXI 5.0, active path connected, mounted, are not not in the data store data store

  HI -.

  I am looking for help to point me in the right direction.  This problem occurred after a reboot of the system.

  I'm in vmware esxi essentials 5.0.0 821926

  I use the starwind software as my iSCSI target

  I use ISCSI to connect to my server from storage to the esxi hosts.

  I have 2 warehouses of data showing inactive under clusters of data storage and the data store.  I have a third-party data store on the same server that is loading properly.

  I currently have the same behavior on three esxi hosts:

  under configuration - storage adapters is the ISCSI path is active. Data warehouses appear under devices and mounted.  In data warehouses, they are inactive. On the same storage server

  on the starwind Server - I have

  built a new target

  removed and added the databases to the new target

  Changed the IP address of the target.

  On Esxi hosts, I removed the ISCSI server, discover places BOF dynamic and static and added under the same or IPs news discovery

  I can restart esxi hosts & storage servers and get to that same point.

  Whenever I find myself in the same place - course assets, devices mounted, inactive in data warehouses

  I don't know what else to share, let me know what you need to know to help out me.

  Thank you

  Dylan

  OK, incase someone crosses my ramblings, it may help.  My original question was warehouses of data that would not rise.  They were visible as devices in the area of storage under devices and as devices in the scsi adapter.

  When I would try to force mount them, add storage, keep the signature, mount they wouldn't mount.  I did some research and my question was after a failed mount attempt strength as got data attached as snapshots warehouses.  I then mounted force them and he tells will data warehouses and I got them back.

  I followed this KB to identify and resolve the problem

  manipulation of vSphere detected as snapshot LUN LUN (1011387)

  When it was over, I tried to add vms back and found a new show.  Power of vms would expire.  the vmkernel.log showed;

  2014 05-27 T 07: 20:40.010Z [verbose 'Vmsvc' 564D7B90] Vmsvc: filtering Vms: ignored not ready to request power state vm vim. VirtualMachine:75

  AND

  (2014 05-27 T 03: 45:47.821Z cpu4:2052) NMP: nmp_PathDetermineFailure:2084: SCSI cmd RESERVE failed on the vmhba35:C0:T1:L0 path, booking on eui.cff548d1952b1e4c of device status is unknown.

  I had latency huge read write showing upwards, 3K and more

  After several searches, I had in the ESXShell and found that there is no conflict of booking.

  On a whim, I took inventory all virtual machines that are now inaccessible.  I then added a DOS virtual machine. Alto! the latency down to version 1.2 a.7 ms for all data warehouses.

  ultimately the instructions said you may need to add virtual machines in the inventory, but does not remove all virtual machines first.  I was grabbing vms that were not in stock, so I didn't remove the old virtual machines in the inventory.

  A recruit Mennonites, Yes.

• Questions of ESXi 5.1 ISCSI--&gt; cannot establish a network connection (continued)

  Hello world

  I had a problem there not too long ago (thread link below) where my ESXi hosts could not establish a connection with an IBM DS3500 on start up and "rescan", however their connectivity worked correctly without any problem after commissioning and when a "rescan" finished. We determined that the most likely cause was the unit IBM itself. However, I wasn't completely satisfied.

  In order to deepen the question and dismiss my guests being the problem, I created a unit ISCSI myself with two new hosts of ESXi 5.1 (version 1157734).

  ESXi signals that it cannot connect to the initiator ISCSI (network error) - but it can run virtual machines and browse data stores?

  The configuration is the following:

  Test environment:

  2 x ESXi 1157734 hosts

  1 x server Freenas ISCSI (ZFS R10)

  At the start of my ESXi hosts in the test environment, download the same error as our production environment. They also put on the same error message (in the event log) when I "rescan" map of the ISCSI software. However, once the scan is finished, I can't see any error message and everything continues as it should (Round robin, active active). I can get a brilliant flow also. It's as if the errors are almost... false positives?

  Example of the error message (test environment):

  Connection to the iSCSI target

  IQN.2011 - 03.org.example.istgt:iscsi on vmhba35

  @ vmk2 has failed. The iSCSI initiator couldn't

  establish a network connection to the target.

  error

  17/10/2013-08:33:35

  ESXi hosts are configured as follows:

  Test environment:

  • (ESXi hosts) Two network cards for ISCSI, one for VM traffic
    • NIC1: 10.20.20.2/24, NIC2: 10.30.30.2/24
  • (Freenas) Two network cards installed on the ISCSI device (dedicated to ISCSI traffic)
    • NIC1: 10.20.20.1/24, NIC2: 10.30.30.1/24
  • ESXi is set to round robin, which works properly (I can max on both ports at the same time)
  • Two VMKs are related to the ISCSI Software initiator and defined to dynamically discover the two ISCSI addresses
  • Unity of ISCSI and the hosts are not on the VLAN, the switch is dedicated to ISCSI traffic (However in the production, the two networks are separated by VLAN.) I removed the in the test environment to simplify everything)
  • The vSwitches (who hold a single VMK for ISCSI) are fixed:
    • "Promiscuous" mode: reject
    • Change of MAC address: accept
    • Forged passes: accept
    • The traffic shaping: disabled
    • No NIC teaming (obviously)
    • Each VMK inherits the settings of these

  Quick points:

  • My hosts use VMware approved NIC in my test environment. My production environment runs on full VMware hardware approved
  • Can I use ping of vmk join each each VMK ISCSI initiator
  • I can use the nc-z target_ip 3260 command to check connectivity to the port
  • The ISCSI test has two network adapters, each on 1 Gbps ports
    • I can get around 800mbps per port when copying lots of files (both ports are active)
    • I see no error in copying a large number of virtual machines around, or backup files
  • I only see errors on start up and "rescan".
  • I have two network adapters on each host ESXi dedicated for ISCSI. Each NETWORK card has a single VMK. A single mapped port on ISCSI, the other is mapped to port B (I used to have two VMKs by nic, but I removed that in order to simplify everything)
  • I have updated the firmware on our switch of production. No results
  • I've used 4 different switches in order to avoid a network problem. No results
  • I tested ESXi versions 5.0, 5.1 (799733 & 1157734), all have the same mistakes
  • The ISCSI ports are on different networks according to the VMware (I was told not to put on the same network VMKs)

  Any ideas? It's starting to drive me up the wall. Any help would be greatly appreciated

  I've seen several times in recent months and was beginning to think it is specific to the HP P2000 units because it's the only time wherever I saw him! I now believe that ESX/iSCSI rather than issues of driver or table.

  On my last install, I found that errors occur as soon as the table is connected, i.e. before any storage is displayed.

  Single host ESX, no guests. 2 Intel adapters to 2 HP past by dedicated HP P2000 1 GB table with all 8 wired ports.

  All roads are good, all lights are in the State expected.

  It did not affect the use of the storage in question to any site, so there has been no need / a momentum of any further investigation.

  B! 886y annoying however!

• ESXi 5 storage connectivity problems

  When I was setting up our infrastructure to vsphere 2 years ago I did everything according to the "best practices" (Netapp, VMWare and Cisco).

  I had 2 4.0 hosts and I implemented the storage network (NFS and iSCSI) as an EtherChannel on one side of the switch Cisco and active NIC and IP HASH in a side ESXi load balancing.

  Now, I just added 2 more than 5.0 hosts, reclassified vCenter to 5 and wanted to set up the new host for storage, but that is the problem.

  Somehow ESXi5 let me use exactly the same configuration, I can't have 2 active adapters on both ESX and for this reason, I can't use hash IP in this vSwitch load balancing.

  So, how am I suppose to add Stoarge to the new ESXi5?

  EtherChannel is no supported network storage more on ESXi5?

  If I have to stop using EtherChannel on the CISCO site that will break my conection of storage for the two production hosts ESXi 4.

  Any input appreciated.

  Thank you

  Add maps via the iSCSI GUI software is ports VMKernel will link individual (and usually multiple) of a single software iSCSI initiator.  "It's the GUI version of ' esxcli swiscsi nic add n d .

  To configure this for vSphere 5, VMkernel port NIC grouping settings must be configured as described in the error.

  If you choose to not explicitly link VMkernel ports the software initiator, let the empty Network Configuration tab, and the VMkernel routing table automatically chooses an appropriate VMKernel port to connect.  According to your description, this is how your environment vSphere 4 is set up.

• subnet VMkernel iSCSI for direct-attached storage

  Hello

  I have two hosts esxi 6.0 that I connect to a shared via iSCSI storage. I followed this document technical http://www.vmware.com/files/pdf/techpaper/vmware-multipathing-configuration-software-iSCSI-port-binding.pdf#sthash.7bztDoAS.dpf to configure interfaces iSCSI on the esxi with binding ports host. No problem.

  I use HP MSA 2040 with a dual controller and I'll connect two hosts directly on the shared storage. As for the hardware, according to the documents on best practices, it is recommended to follow a vertical subneting for ports of controllers. However, I have not found no requirement for iSCSI ports in vmware, all of the examples I found configure each vmkernel port in a different subnet, as I did:

  vSwitch0

  iSCSI1 - vmk2 - 192.168.1.11 (unused vmk3)

  iSCSI2 - vmk3 - 192.168.2.11 (unused vmk2)

  So, my question is vmkernel ports are in different subnets? or could they be in the same subnet with no difference performance wise?

  Any help would be appreciated.

  Thank you!

  in your case, because you are trying to achieve Multipathing to iSCSI Software initiator, the vmkernel ports should be in the same subnet.