Re: FC Storage, AVT and some doubts
I have noticed that some of the documentation for the E-series is little bit dated, make sure you are looking at the right ones. I have recently configured E-2700, iSCSI, and I didn't make any changes...
View ArticleRe: best practices for setting up a file server data HDD
Thanks for the reply a.p. and sorry for the late response, I got a bit busy. As for using a VMDK:- If I ever needed to move the file storage, how easy would it be?- How does this work if I wanted to...
View ArticleRe: FC Storage, AVT and some doubts
Well, I did some additional research before to open a case with NetApp and my problem seems to be like this: Unexplained LUN trespasses on EMC VNX explained I have disabled VAAI temporary to make a...
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[ 3536846848: 15960375296] --> [Backing device/extents are offline]
Can anybody explain what the results of vmkfstools -t 0 mean exactly ? Background: Update ESXi 4.1 to 5.5 produced corruption on a VMFS 3 datastore.ESXi 5.5 does not read some flat.vmdks at all and...
View ArticleRe: [ 3536846848: 15960375296] --> [Backing device/extents are offline]
You may already have tried this (vmkfstools -P VMFS_volume), but in case you didn't take a look at e.g. http://kb.vmware.com/kb/2019003. André
View ArticleRe: FC ALUA Storage, LUN trespass and some doubts
The official answer from NetApp is that they are aware of the problem and it will be fixed in a future firmware release.
View ArticleHelp w/ Passing SQLIO Stress Test
We currently have a virtual machine (Server 2008 R2 64bit w/ 32Gb Memory and 2 VCPU and 4 Cores per) running on our Cisco UCS (UCSB-B200-M3 ESXi 5.5.0) that we would like to have run our Blackboard...
View ArticleRe: [ 3536846848: 15960375296] --> [Backing device/extents are offline]
Oops - I was not aware of that function.I usually check wether a VMFS-volume uses extents with a hexdump command.With that hexdump command it looked like only a single extent was used. Unfortunately...
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Unmounted NFS-vVol-Datastore -> How to mount it again or get rid of it?
Hi there, I configured with vSphere 6.0 and NetApp-Sim 8.3, NetApp VSC 6.0 and NetApp VASA 6.0 a vVol environment. I created an NFS-vVol-Datastore called "vvolnfs1". Then I tried to destroy the...
View ArticleIs Heartbeat IO ATS only on VAAI enabled datastores?
Our storage vendor issued an advisory relating to Host Disconnects Using VMware vSphere 5.5.0 Update 2 and vSphere 6.0. The advisory contends that vSphere 5.5 U2 and higher has changed to using ATS...
View ArticleRe: Disk device path not specified for RDM backing
I hit this exact error presenting iscsi luns from Netapp to vmware. The LUN was type "windows" mapped in a igroup of type "vmware". Hence the Lun was being mounted as a raw device. I confirmed both...
View ArticleRe: Is Heartbeat IO ATS only on VAAI enabled datastores?
I've read about that recent issue as well:Change in VMware 5.5 U2 ATS can cause storage outages! | Virtual Me My understanding is that if VMware detects VAAI support at the creation of a datastore then...
View ArticleRe: Is Heartbeat IO ATS only on VAAI enabled datastores?
Confirmed in VMware KB: Disabling the VAAI functionality in ESXi/ESX We're not seeing any hint of issues so I suppose we will treat it as good to know for now. Thanks for replying!
View ArticleVAAI : Cloning does not get offloaded to storage array.
Hello Team, Need your help on this issue. Issue Description : When we initiate cloning of any VM on datastore which support VAAI ( hardware acceleraion ), we see, it is slow. Findings :VAAI ( XCOPY )...
View ArticleStorage Migration validation warning
Hi, When trying to migrate a vm to a newly created datastore cluster i get at compatibility the following warning: server side validation cannot be performed when datastore cluster is part of the...
View ArticleRe: Storage Migration validation warning
Hi, Are you using Storage DRS cluster, if yes, you can safely ignore this message, it is just vCenter cannot verify the destination because of storage drs cluster.
View ArticleRe: Storage Migration validation warning
Yes, we are using SDRS, but we also have some others SDRS on which it doesn't show that warning.
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Re: [ 3536846848: 15960375296] --> [Backing device/extents are offline]
Update ...Looks like the update to ESXi 5.5 failed in a very ugly way.The ESXi 4.1 was installed to a 1Tb disk - with about the first 420 Gb used.Sometime later the existing VMFS-volume in primary...
View Articlethin vs thick provisioning and performance impact
I know that eager zero disk are supposed to have the best performance, but for thin provisioned disks, after the initial write penalty, is there still a performance impact or is it the same as thick? I...
View ArticleRe: thin vs thick provisioning and performance impact
Is it http://www.yellow-bricks.com/2012/12/19/death-to-false-myths-the-type-of-virtual-disk-used-determines-your-performance/ what you read? André
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