NFS datastore continues to lose connectivity

Similar Questions

• NFS datastore = > no host not connected, impossible to remove

  Hello

  I have a NFS datastore (it was an ISO repository), I need to delete.   So I deleted all records from this share

  My problem is I disassembled it all hosts and the data store is still visible in my inventory and I am unable to remove it.

  When I try "Datastore Mounte to... additional host", the Wizard run in an endless loop and does not load the list of hosts.

  On my hosts, the NFS share is not visible. So nothing stuck because of a file in use.

  Have you already encountered this problem?

  Sorry found the culpit... instant on the virtual machines (with mapped CD-ROM).

• Satellite L875D - 106 internet continues to lose connection

  Hi all

  I recently got a Toshiba-brand new laptop, but I have problems with the internet. It connects fine, but he will often lose the connection, and then reconnect again. It usually falls just for a few seconds and when I'm just browsing, and if it's not really that much of an issue, but I also play on this computer, and it's a real problem for me because I keep late because of the loss of the internet and/or abandonment.

  I have a suspicion that this is due to a freezing of the computer gets sometimes, which is very noticeable while watching a movie or listening to music. It freezes for about 1 second and then continues on his business after that.

  When I'm at home I use a cable to get internet i live in a student House, so that we don't have to speak right to have wireless, but it's also goes to school where there is wireless connections. I have not had any problems with the internet connection when using my previous laptop, and my boyfriend (we share the apartment) has a fixed + laptop which work fine with the same switch for internet.

  Really hope you can help me!

  Thank you DBOBA for sharing your experience here in the community.

  You're right: change the WLan PCI power settings in Windows Advanced Power Options can help avoid these annoying wifi disconnections.

• Satellite C660 continues to lose its wireless connection

  Hello

  We bought the laptop above for our son for Christmas and he continues to lose its wireless connection, we also have a satellite L450 that works well (not to lose the internet connection), we were on our broadband provider that they told us that the wireless connection on our other laptop is fine It's something to do with the C660, one of the pilots is in need of an update, unfortunately I forgot the name of the driver, but it's something to do with the modem, our son is desperate to use his laptop.

  Can anyone help?

  Try it please update driver WLAN.
  Latest version, you can find the portal of Toshiba WLAN > http://aps2.toshiba-tro.de/wlan/

  If you n t know that you need please exact notebook model poster or the name of the template for laptop.
  This info, you will find at the bottom of the thumbnail of Toshiba.

• 6700 hp officejet premium continues to lose its wireless connection

  My 6700 hp officejet premium continues to lose its wireless connection.  I have to restart the computer to restore the connection.  What causes the lost connection & how to fix it?

  Hi radensu3,

  To what extent is the router of the printer?

  What is the operating system on your computer?

  Launch the firmware according to here

• Photosmart HP 7520: All wireless network devices will lose connectivity after printing

  Dear all, 
  
      I have a problem with my HP Photosmart 7520 printer where all wireless network devices will lose connectivity after a printer has been sent to the printer.
  
  * Summary
  Wireless network unusable after sending one print to HP printer
  No device ( computers nor smartphones ) can use the Internet nor access internal networks ( 192.168.0/24)
  
  * Details
  Turn HP printer on.  ( wireless direct is off - never turned on )
  HP printer connects to working wireless network.
  Other devices ( phone/computers ) already connected and working.
  From any device, send a document to the printer.
  Printer prints document successfully.
  Immediately after printer has printed all devices cannot access internet IP range ( including HP printer ) nor Internet nor router ( 198.168.0.1 ).
  
  * Reproducibility
  Always
  
  * Work around
  Disconnect all devices from the network.
  Power off printer.
  Reboot Internet router.
  
  * Attempted solutions
  Removed wireless configuration.
  Factory reset.
  Added wireless configuration back.
  Powered on and off printer.
  
  * Printing tested with
  Tested with Macbook10.11/Windows 8/Ubuntu 12/Android 4.4.2
  
  * Not tested
  Ethernet cable directly connected to router.
  
  * Internet Router
  Netgear CG 3700
  

  Number of brand and model of the router?

  These settings are to set up your printer wireless (or wired):

  • Stay connected to your router
  • Trouble printer status 'offline '.
  • Wake mode 'sleep'
  • All wireless devices stay better connected

  While the DHCP is convenient, devices like printers (wired and wireless) should always be assigned a (fixed) IP address manually to avoid conflicts on your wireless network and must be outside the range of the router DHCP.  After the adjustment of the static IP address the computer must be updated to show a Standard TCP/IP port with the IP address of printers under printer properties/Ports.

  1. Set a static in the printer IP address (click here) outside the range of the DHCP of the router (check your manual). It is for Linksys routers, but can be used for all routers. Check your DHCP range and change this first if necessary. More Help Wireless Printing is here and here and still more here.  Video here explains the problem and how to solve the problem. <--> So watch this!
  2. Or check in the printer "Auto Off/sleep/Energy Saving Mode" is disabled the System Mode Time Out is set to zero (0) Use the built-in webserver (EWS) by visiting the printer address IP address in the address bar of your browser, click on settings tab/Auto Off. Or use the printer, printer Home Page (EWS) Wizard. Also check your printer properties.
  3. If the printer supports and has IPv6 enabled, disable the IPv6 option in the printer.
  4. Make sure that the printer is connected directly to a socket wall and not to a UPS, power strip or a lightning arrestor. This will cause the printer to drop offline connection and disconnection (checked yes!).

  Additional measures to take if you continue to have the problem (if they are posted)...

• For NFS Datastore vSphere alarms

  So I would like to create an alarm that corresponds to a (not state) event that fires when a NFS data store is disconnected.  I found the trigger "Interruption of the connection to the NFS server", but it doesn't seem to work at all.  Also, I would only triggers the action when the host is not in Maintenance Mode, because that would be very annoying for an outgoing call because a host has restarted for patches and generated alarm type disconnected "NFS Datastore.

  use triggers esx.problem.storage.apd. *.

  When NFS disconnects you will get official messages in the file vmkernel.log on the host

• Windows do not install ISO in the NFS datastore

  Hi all

  I searched this forum for a few days and tried to suggestions from different positions without success. I recently installed ESXi 5.1 update 1. I have setup a NFS datastore on the same computer by using a USB external hard drive. I was able to install RHEL6 using an iso from the NFS data store. The problem is that I can't install Windows by using an iso of Windows 7. Whenever the virtual computer is booted, it aims to achieve crashes and boot TFTP. No iso standard is detected. I tried the following:

  1. guaranteed 'Connected' and 'Connect at Power On' options for CD/DVD are verified. However, I have noticed that when the virtual machine starts, the 'Connected' for Windows option becomes not controlled. This is not the case for the Linux VM.

  2. change the boot order in BIOS to the first boot from CD/DVD.

  3. uncontrolled ' connect at power on "for network adapters.

  Even after these changes, VM trying to do a start-up network and TFTP.

  The next thing I did:

  4 network cards removed from the BIOS (by changing configuration).

  For the moment, VM does not network boot attempt, but complains that the operating system was not detected.

  Few details on the NFS datastore:

  1. 1 TB external USB with 2 Configuration of partitions ext4 as an NFS share to the RHEL6 server on the same machine.

  2. NFS configured correctly because I can install from an iso RHEL6 very well.

  Am I missing something? Nothing wrong with iso of Windows. I used it elsewhere. Also tried a different iso Windows without success. Help, please. Thanks in advance for your time.

  Kind regards.

  As the ISO for the operating system files are big and sometimes take a considerable amount of clusters on the hard drive make a control office (or a scan of the drive) can fix corrupt ISO file. and to make sure that your ISO is not corrupted try to open it with Winrar and extract a file from it.

  Yours,
  Mar Vista

• Poor ESXi 4 NFS Datastore Performance with various NAS systems

  Hello!

  In testing, I found that I get between a half and a quarter of the e/s inside a guest performance when ESXi 4 systems connect to the using NFS data store if the clients connect to the exact same NFS share.  However, I don't see this effect if the data store using iSCSI or local storage.  This has been reproduced with different systems running ESXi 4 and NAS systems.

  My test is very simple.  I created naked CentOS 5.4 minimum installation (completely updated 07/04/2010) with VMware Tools loaded and the creation time of a file of 256 MB using jj.  I create the file on the root (a VMDK stored in different data warehouses) partition or a directory of the NAS mounted via NFS, directly in the comments

  My crucial test configuration consists of a single test PC (Intel 3.0 GHz Core 2 Duo E8400 CPU with a single Intel 82567LM-3 Gigabit NC and 4 GB RAM) running ESXi 4 connected to a printer HP Procurve 1810 - 24 G, which is connected to a VIA EPIA M700 NAS system running OpenFiler 2.3 with two 1.5 to 7200 tr / MIN SATA disks configured in front of software RAID 1 and dual Gigabit Ethernet NIC.  However, I have reproduced it with different ESXi PC and NAS systems.

  This is a release of one of the tests.  In this case, the VMDK is a store of data stored on the NAS via NFS:

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 0,524939 seconds, 511 MB/s
  Real 0m38.660s
  user 0m0.000s
  sys 0m0.566s
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,69747 seconds, 30.9 MB/s
  Real 0m9.060s
  user 0m0.001s
  sys 0m0.659s
  mnt root@iridium#.

  -

  ---

  The first dd is a VMDK stored in a connected via NFS data store.  The dd ends almost immediately, but the synchronization takes nearly 40 seconds!  It's less than 7 MB per second transfer rate: very slow.  Then I get the exact same NFS share that ESXi is used to store data directly in the comments and repeat the DD.  As you can see, the SD is longer and the synchronization takes no real time (as befits a NFS share with active sync), and the whole process takes less than 10 seconds: this is four times faster!

  I don't see these results on data warehouses mounted via NFS.  For example, here is a test on the guest even running from a mounted via iSCSI data store (using the exact same SIN):

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 1,6913 seconds, 159 MB/s
  Real 0m7.745s
  user 0m0.000s
  sys 0m1.043s

  
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,66534 seconds, 31.0 MB/s
  Real 0m9.081s
  user 0m0.001s
  sys 0m0.794s
  mnt root@iridium#.

  -

  ---

  And the same comments linking internal SATA drive of the PC ESXi:

  -

  ---

  root@iridium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 6,77451 seconds, 39.6 Mbps
  Real 0m7.631s
  user 0m0.002s
  sys 0m0.751s
  root@iridium /# mount/mnt 172.28.19.16:/mnt/InternalRAID1/shares/VirtualMachines
  root@iridium /# cd/mnt
  synchronization of the # mnt root@iridium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 8,90374 seconds, 30.1 MB/s
  Real 0m9.208s
  user 0m0.001s
  sys 0m0.329s
  mnt root@iridium#.

  -

  ---

  As you can see, the performance of NFS direct comments for each of the three are very consistent.  ISCSI and the performance of the store local data disk are both a bit better than that - as I expect.  But the mounted via NFS data store gets only a fraction of the perfomance of the any of them.  Obviously, something is wrong.

  I was able to reproduce this effect with an Iomega Ix4 - 200 d as well.  The difference is not as dramatic, butalways important and consistent.  Here is a test of a guest of CentOS using a VMDK stored in a data store provided by an Ix4 - 200 d via NFS:-.

  root@palladium /sync #; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 11,1253 seconds, 24.1 Mbps
  Real 0m18.350s
  user 0m0.006s
  sys 0m2.687s
  root@palladium /# mount/mnt 172.20.19.1:/nfs/VirtualMachines
  root@palladium /# cd/mnt
  synchronization of the # mnt root@Palladium; Sync; Sync; time {dd if = / dev/zero of = bs = 1 M count = test.txt 256 sync; sync; sync ;}}
  2560 records in
  2560 records out
  268435456 bytes (268 MB) copied, 9,91849 seconds, 27.1 MB/s
  Real 0m10.088s
  user 0m0.002s
  sys 0m2.147s root@palladium mnt-#.

  -

  ---

  Once more, the direct NFS mount gives very consistent results.  But using the diskette provided by ESXi on a mounted NFS datastore gives still worse results.  They are not as terrible as OpenFiler test results, but they are constantly between 60% and 100% longer.

  Why is this?  What I've read, NFS performace is supposed to be within a few percent of the iSCSI performance, and yet I see between 60% and 400% worse performance.  And this isn't a case of the SIN is not able to provide correct NFS performance.  When I connect to the NAS via NFS directly inside the guest, I see much better than when ESXi connects to the same NAS (the same proportion!) via NFS.

  The configuration of ESXi (network and network cards) is 100% stock.  There is no VLAN in place, etc., and ESXi system has only one

  Single Gigabit adapter.  It is certainly not optimal, but it doesn't seem to me to be able to explain why a virtualized guest is able to get a lot better performance NFS as ESXi itself to the same NAS.  After all, they both use the same exact suboptimal network configuration...

  Thank you very much for your help.  I would be grateful any idea or advice, you might be able to give me.

  Hi all

  It is very definitely a performance O_Sync problem. It is well known that NFS VMware shops still use O_Sync for writes little matter what share put for a default value. VMware uses a custom file locking system so you really can't compare it to a normal NFS share connection to a different NFS client.

  I have validated that the performance will be good if you have an SSD cache or storage target with enough reliable battery backup.

  http://blog.laspina.ca/ubiquitous/running-ZFS-over-NFS-as-a-VMware-store

  Kind regards

  Mike

  vExpert 2009

• My pro iPad connects to the WIFI, but loses connectivity to drops in use.  My other IOS devices (iPhone, macbook, etc.) do not have this problem.  Ideas to solve?

  My pro iPad connects to the WIFI, but loses connectivity to drops in use.  My other IOS devices (iPhone, macbook, etc.) do not have this problem.  Ideas to solve?

  Hello BrooklynWM!

  I definitely want my iPad to stay connected to the Wi - Fi connection while I use it.  Thanks for posting that other iOS and OS X devices have no problem with the connectivity dropping.  We can try a few things.

  Would first go through the steps listed in this article: If your iPhone, iPad or iPod touch connects to a Wi-Fi - Apple Support Network

  Then if it does not help, you can check network settings with this: recommended for the WiFi routers and access - points Apple supported

  After trying those, if you still see the drop connectivity, make sure the iPad Pro is updated with iOS 9.3.2 and check to see if the connection when you are in a certain place, time, or one event happening elsewhere in the House.

  Best regards.

• the magic mouse 2 loses connection

  My magic mouse 2 is loaded (88%) and connected via bluetooth to my macbook pro (late 2011, OS X El Capitan 10.11.4).) Sometimes it loses connection and after a short time reconnects, what should I do for him have always connected, I mean without capricious disconnections?

  Hello heide1,

  Thank you for using communities Support from Apple!

  I understand that your Magic Mouse 2 going through temporary disconnects and stops responding intermittently. We know that situations of this kind can be frustrating, but we are here to help.

  To begin troubleshooting, I suggest to read and work through the steps in the following article.

  Your mouse or your keyboard intermittently not responding

  Follow these steps if your mouse or your keyboard sometimes stops responding temporarily.

  Click or press a key

  • Click on the mouse or trackpad, or press a key on the keyboard to reconnect the device to the computer. It may take a while for the device to respond.

  Search for interference of signals

  • Wireless networks that operate on 2.4 GHz can cause interference. Move base stations of phone wireless, microwave ovens and other appliances of 2.4 GHz far your Mac if you suspect interference.
  • Keep devices wireless to 10 meters (30 feet) of your Mac.
  • Avoid putting metal objects between your wireless device and your Mac.

  If your Apple wireless mouse, keyboard or trackpad doesn't work as expected - Apple Support

  See you soon!

• WiFi loses connection intermittently and the erasure of the arp arranges

  This has been asked before many times, but none of the above worked for me so far.

  I have a MacBook Pro with El Capitan on it. From time to time, usually 5 to 10 minutes,

  my connection drops and I can browse the internet. As:

  4 bytes of 8.8.8.8: icmp_seq = 7646 ttl = 53 time = 13,091 ms

  64 bytes of 8.8.8.8: icmp_seq = 7647 ttl = 53 time = 17,035 ms

  64 bytes of 8.8.8.8: icmp_seq = 7648 ttl = 53 time = ms 13,716

  Request timeout for icmp_seq 7649

  Request timeout for icmp_seq 7650

  Request timeout for icmp_seq 7651

  Request timeout for icmp_seq 7652

  Request timeout for icmp_seq 7653

  Request timeout for icmp_seq 7654

  Shooting, then turn on the WiFi will fix the problem, but I tried to limit the problem

  and I discovered that deleting IP of the route in the arp table will also fix connectivity

  immediately:

  $ sudo arp d 192.168.0.1

  Request timeout for icmp_seq 7718

  Request timeout for icmp_seq 7719

  Request timeout for icmp_seq 7720

  64 bytes of 8.8.8.8: icmp_seq = 7721 ttl = 53 time = 10,947 ms

  64 bytes of 8.8.8.8: icmp_seq = 7722 ttl = time 53 = 11,966 ms

  64 bytes of 8.8.8.8: icmp_seq = 7723 ttl = 53 time = 12,576 ms

  64 bytes of 8.8.8.8: icmp_seq = 7724 ttl = time 53 = 11,058 ms

  64 bytes of 8.8.8.8: icmp_seq = 7725 ttl = 53 time = 15,173 ms

  Deactivation of unicast arp has NO had no effect either:

  $ sudo sysctl-w net.link.ether.inet.arp_unicast_lim = 0

  Notes:

  -J' have two MacBook Pro at home. Other works without problem.

  -My phone and other devices work also with the same router with no problems.

  -The problematic MacBook works with other WiFi networks without any problem.

  What could be the problem?

  Yes, clear arp fix it. Very familiar with it.

  I had this problem for 2 years and more than 2 or 3 MacBooks, on El Capitan, Yosemite, and Mavericks.   I Googled it every 1-2 years months.  I captured packets and tested several access points... The best fix so far... is the arp compensation, and I have the automated at the moment:

  in a terminal:

  While true; make sudo arp - da; sleep 2; fact

  When the window is open, every 2 seconds, my arp table gets undervalued... and if I lose connectivity, the maximum cut is 1 to 2 seconds.

  I noticed that in some places, I don't have the problem... its as if my laptop reacts badly to some other customers on the same WIFI network.  This question makes me crazy, and I can't imagine how was such years.  If I don't fix it manually, I find myself for 30-120 seconds every few minutes.

• Satellite M30X-129 loses connectivity with the external USB device

  I have a problem with my laptop that has regularly been do worse and I can handle is no longer!

  Whenever I work with external devices via USB ports (all kinds of devices but my external hard drive Smartdisk CrossFire and my iPod in particular), after a certain period of time (sometimes minutes, sometimes hours) the laptop loses connectivity with the device.

  If happens to be listening to the music, download photos from a camera or laptop computer for the ' net or sync of the iPod, the connection is cut off, turning off the device and I have to start all over again!

  I'm almost at the point of launch of the laptop by the window, so any help is most welcome.
  Thank you
  Abderrahman

  Hello

  This happens also with the external USB mouse?
  This occurs if the power adapter is plugged or only if the laptop running on battery?

  In-hubs properties > Device Manager USB root-> power management
  You will find the option called allow the computer to turn off this device to save power.

  I would recommend the brand and disable this option.

  Maybe it helps.

  By the way; When do you update the operating system? I think that it s there long time, perhaps some system files or registry entries are corrupted or a 3rd party application affect the USB functionality?

• OfficeJet Pro 8600 all-in-One connected as network printer loses connection

  In December 2011, I bought a HP Officejet Pro 8600 all-in-One to replace an Officejet 6500 as my network printer home. The 6500 worked very well on my cable, but his screen did not, I tried some of the features offered by the 8600 and I got a good price on a new warehouse of BJ. I have the 8600 connected via ethernet (not wireless), with a static IP address. All my computers on the network are running Windows XP Pro SP3 and are up-to-date with Microsoft updates. However, from one day to the next my 8600 will lose connectivity scan (Scan of the computer shows it as being disabled on all my computers at the same time, and I can't reconnect), and if I do not have anything he'll (as in a few hours) also lose connectivity impression. The only way to restore connectivity is to uninstall the HP Officejet Pro 8600 device software basis of all computers, and then reinstall the printer. I had a phone conversation and two debates with HP Technical Support; They suggested that the problem is in the firewall on the computers (but if that were the case I don't think that the loss of connectivity would occur on all computers at the same time), the IP address setting (doesn't make sense) and the printer driver is not not the latest version. I tried all the suggestions, and none of them have solved the problem. The last counselor "has raised the issue to the next level", which proved to be a Manager with no technical expertise and his only suggestion was that I have to return the printer to the merchant. I think the problem is the firmware in the printer (which, according to the 'update' on the printer option, is the latest version). Any other suggestions or experience?

  After a lot of research and find the settings that I did not know that Windows XP offered, I found that the following appear to have solved the problem I've known - at least the printer is now operational for more than 48 hours without losing printing or scan connection. Here are the steps I used:

  1. Start Control Panel  connections network and Internet

  2. Choose "network connections."

  3. Right click on "connect to the Local network.

  4. Choose "Properties".

  5. In the top window is the name of the Ethernet computer connection port, select "Configure" next to this window

  6. Select the tab labeled 'Power Management'

  7. Uncheck the box "allow the computer to turn off this device to save power".

  8. Select the "Advanced" tab

  9. Select the entry "power saving Mode".

  10. If this entry is set to change 'On' to 'Off '.

  11. Select 'OK', and then close the windows that were opened

• laptop continues to lose wireless networks requires restart to work again

  My latitude D630 dell with windows xp will randomly lose all wireless networks. It takes a reboot for it once again, but then only works for a little while until she randomly loses connections again. I tried to disable the firewall, but that can help didin't. Please notify

  Hello JaunitoHortoni,

  What service pack Windows XP do you currently use?
  You can check this by clicking on 'my computer' and selecting Properties. A box will appear showing your Windows Version and Service Pack (if any)
  If you are not running Windows XP Service Pack 3, then I suggest download and install it to see if it solves your problems Wireless:
  http://support.Microsoft.com/kb/322389