Converting iSCSI vNICS from (4) 1Gbps Broadcom to (2) 10Gbps Intel X540 NICS
Our company has recently procured (2) Force 10 S4820T network switches with the intent of upgrading our switch fabric to 10Gbps across the board. Additionally, we have purchased (2) Intel X540 DP (Dual...
View ArticleWhat to do with ModePageCode.CONTROL_MODE_PAGE of SCSI ModeSenseStage?
Hi, I am using a iSCSI target write in Java (jscsi.org). I can connect from microsoft windows initiator and linux open-iscsi initiator. My problem is when I try to connect from vmware iSCSI initiator....
View ArticleFC Storage, AVT and some doubts
Hi there! First thank to all for this great community! I am configuring a small vSphere 5.5 cluster, and everything seems to be ok, but I have some doubts that I will want to share. The configuration...
View ArticleDataCore thin provisioning and vSphere Thin provisioning, is there an issue
Hey Everyone, Question: If Datacore is thin provisioned (storage layer), and VM's are thin provisioned (VMWare layer); is there an issue if: A VM is thick provisioned and then thin provisioned...
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...
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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...
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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 ArticleDisk device path not specified for RDM backing
Hi, I am currentlly trying to create shared storage to use on a Microsoft cluster within ESX 5.1 environment. We are using a NetApp SAN (V3160 Series) When the LUN is created and attached to...
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 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 ArticleCan I write to RDM from outside of vm and if I can should I?
Forgive this very basic question about RDM's but its an feature I haven't need of before. If I present a vm with a RDM for use e.g for FTP server storage so that whether I use the vm itself or some...
View ArticleAbout ATS Write operation
VMware VAAI ATS use CAW（Compare and Write）command,and I read the SBC specifications,but the CAW's write operation have not more details.The question is CAW's write operation is Atomic Write？Somebody...
View ArticleStorage considerations - recommendations
Hello.I am about to replace our old storage, because it is too slow. I have some doubts of the following; I have narrowed it down to the following 2 boxes, because of price and amount of features...
View Articletraditional RDMs versus NPIV RDMs
Hi folks -- I am trying to test out NPIV storage for guests versus RDMs in physical mode -- please correct my understanding and also please kindly add any additional advanatages as you see fit 1. with...
View ArticleStorage Migration - More Space Used Than Files Shown
I've been searching for a post that is similar to this and been coming up emtpy handed. If this has been covered somewhere else please feel free to point me there. Our company is running 3 Dell hosts...
View ArticleWhat Flash Drives are you using for VSAN?
I've been using Intel S3700's for VSAN with vSphere 5.5, but hearing good things about Sandisk.I noticed that the Intel 36xx series is now on the HCL for capacity tier (which is nice as they cost 1/2...
View ArticleDisk Provisioning for a Noob
Hello Everyone, I'm fairly new to the Virtual world, and my task is to change a thin provisioned disk into a thick eager zero one. The server was restored after a Windows Update problem and...
View ArticleESXi 5.1 vmdk i slarger than the maximum size
Hi everybody. I have esxi5.1 with luns formatted as vmfs5. I created VM with 2 tb hard disk, now i cannot create snapshot via veeam, it tells that file vmdk is larger than the maximum size supported by...
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