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• Expanding iSCSI LUNs (NTFS)

  - by Fatih

  I have a 4TB iSCSI LUN that formated as NTFS in Windows 2008. I've shared this formated volume as a folder over SMB. When the capacity of this volume is not enough, I have to add more iSCSI LUNs, but the end-users must see only the folder that I've shared before. So, when I expand the NTFS volume that is currently 4TB, with more iSCSI LUNS(for example 2 more 4TB LUN), if one of the luns is failed, or missing, will all of my data in the folder be lost? I imagine that the expanding ntfs volume is like RAID 0(striped). if it is like RAID 0, then all my data will be lost when one of the luns is failed, or missing. In brief, there are two questions in here: 1- What will be happened, if one of the luns is missing in an expanded ntfs volume? 2- Is there another way to merge all of iscsi luns as only a folder, in that way the users don't see any extra folder even if I add extra iscsi luns to the file server.(I don't mention about DFS) Regards.

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• Connecting to iSCSI Target

  - by Joost Verdaasdonk

  I've installed Microsoft iSCSI Software Target 3.3 on a server 2008 R2 machine and created a new iSCSI Target. In the target I created a new Virtual Disk. From another server I started iSCSI Initiator and in Targets | Target I typed the IP of the Target. (Also tried DNS name.) But when I click Refresh I never see the target. Through googling I found this Youtube tut from a French guy doing pretty much what I did (only difference is I'm in a domain). I first though that maybe Port 3260 was closed but its not I can telnet to it. Also disabled all firewalls to see if that was blocking anything... No luck so far. Does anybody know of possible reasons why I can't connect to the iSCSI Target? If I can provide more info please let me know what's needed? Extra info: I've used this tut to set things up.

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• I need advice about iscsi + zfs(or ntfs) + windows 2008 clustering

  - by Fatih

  I want to setup a storage farm with iSCSI. I have 2 cluster node machine, 1 iscsi target machine that has 8TB installed as RAID 10. The capacity is now 8TB, but I'll upgrade the capacity in future. Let's say, I installed clusters as file server, and I connected these servers to iscsi target, then I shared 8TB capacity as an only folder to the windows users. Users now see only a folder whose capacity is 8TB. But if I want to add another 8TB to expand the main capacity, the users must not see the second folder for this new 8 TB. The users must see only a folder as before, but this time this folder's capacity expanded to 16TB. And so on, if I add another 8TB, the users must deal with only a folder. For this purpose, I've learnt that ZFS can expand its size without a problem. So if I use ZFS as a file system on iSCSI luns, how can the cluster machines see the ZFS. Because the cluster machines have windows 2008. Is there another way to expand the size of shared folder without a problem? Does ntfs support it?

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• Recover NTFS data from a ZFS pool that was exposed as an iSCSI target

  - by David

  This was me being stupid and the data is by no means critical and is now a learning experience first, time saver second. I set up a 100GB iSCSI target via the bare bone instructions in napp-it. It's a volume LU. I then had my Windows 7 machine connect to the iSCSI target, formatted it to NTFS, and tested the performance of it with some large iso file transfers. I then unmapped the drive, reconnected to the target, and was forced to format to NTFS again. It was then I realized the files I had transferred only existed on the iSCSI target. I threw a little fit and then went about my business. When I was cleaning up my experiment I noticed in this screen: http://imgur.com/1xlcu.jpg That is my experimental target tank/iSCSI and it still has a lot of data in it. Assuming my isos are still in this pool how would I go about recovering them? While writing this I used GetDataBackup for NTFS from www.runtime.org. And while it found two previous NTFS partitions there was no data.

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• Citrix XenServer iSCSI shared disk?

  - by chsguy

  I am running Citrix XenServer Essentials 5.5, with VMs stored on an EqualLogic iSCSI shelf, using XenServer's StorageLink. I would like to create a "virtual disk" that can be attached to multiple VMs. This would be used for a cluster file system like OCFS2 or GFS. This doesn't seem possible using the XenCenter GUI and I can't find anything online about how to do it. I realize I could simply expose the iSCSI network to the VM and have the VM initiate its own iSCSI, but that creates a lot of security challenges. This was pretty easy to do on Oracle VM Server, which is Xen based, so I know it's not a limitation of Xen itself. Maybe there is an "xe-" command for this? Thanks for any suggestions you can provide.

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• Back up Windows 2008 SBS to iSCSI disk

  - by Farseeker

  I've almost no experience with SBS 2008, so please excuse my noob question! SBS 2008 only has the most basic backup utility built in as far as I can tell (similar to Vista), and it will only back up to physical volumes. I've read that you can set up a batch task to backup to a network volume, but right now I just need to get something deployed ASAP. We have an iSCSI target with plenty of free space. Is it worth backing up to an iSCSI target? Or am I wasting my time? If I need to do a recovery from the iSCSI disk, how would I go about it?

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• Create a share on iscsi drive in Windows Server 2012

  - by Crash893

  I am brand new to server administration but I don't belive im trying to do anything to exotic I have a windows server 2012 (standard) and a drobo 800i My goal is to setup company shares on the iscsi target I have setup on the drobo So far I have: initialized the iscsi and connected made the iscsi disk read/write(it default started as read only) formatted and mounted it (as drive E:) from the server local desktop I can see and write files to the E:\ drive in shares wizard I do not see it as a volume option when I view the volumes window I see (e: drobo Fixed 16tb 16tb) I'm new to everything but I would think since its a mounted drive I should be able to share a folder on it but it appears its not that straight forward suggestions?

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• iSCSI drives suddenly inaccessible or corrupted

  - by Hammer1

  I have two NAS (Seagate Black Armors) connected to our network through iSCSI to a Dell Optiplex 760 running 32-bit Windows 7 and Windows iSCSI Initiator. For some unknown reason within the last week both are reportedly inaccessible and/or corrupt (that is the error message generated when I attempt to open the on the iSCSI computer). However, connecting to either of them via direct IP goes off without a hitch. I've tried Error checking but received "The disk check could not be performed because Windows could not access the disk." I've tried System Recover to a date almost two weeks back thinking Windows update may have caused the issue but there is no change. Anyone have an explanation and/or a solution to get them reconnected? Thanks.

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• ESXi with software iSCSI

  - by jharley

  Has anyone had any luck using the swiSCSI driver on ESXi? Following the instructions from VMWare.com I get to the point where I have the iSCSI HBA showing up but no LUNs/targets are showing up. The iSCSI target is running on Solaris 10 update 5 and works with other initiators fine. The ESXi initiator (from the logs) sees the targets but just logs in and out of them every 2 - 5 seconds. We're using unauthenticated discovery, and over and over in /var/log/messages I see: iSCSI: bus 0 target 0 trying to establish session 0xb203f90 to portal 0, address 10.1.100.9 port 3260 group 1 iSCSI: bus 0 target 0 establish session 0xb203f90 #4848 to port 0, address 10.1.100.9 port 3260 group 1, alias data/ESXi iSCSI: session 0xb203f90 dropping after receiving unexpected opcode 0x60 iSCSI: session 0xb203f90 to data/ESXi dropped iSCSI: session 0xb203f90 to data/ESXi waiting 2 seconds before next login attempt The only other thing that seems out of wack is that my 'Recent Tasks' pane keeps filling with 'Browse Diagnostic Manager' events and /var/log/vmware/hostd.log is filled with messages like this up to two times per second: [2008-09-19 16:05:57.901 'TaskManager' 196621 info] Task Created: haTask-ha-host-vim.DiagnosticManager.browser-776 [2008-09-19 16:05:57.094 'TaskManager' 196621 info] Task Completed: haTask-ha-host-vim.DiagnosticManager.browser-766 Any help would be appreciated.

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• Can iSCSI be used with Windows Home Server?

  - by Parvenu74

  I am looking to use a combination of iSCSI (Drobo 8-drive device) and Windows Home Server (either an HP appliance or building one from an older machine). Will WHS + iSCSI work? If so will it work with an HP MediaSmart appliance or do I need to build a server for this particular task?

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• Can iSCSI be used with Windows Home Server?

  - by Parvenu74

  I am looking to use a combination of iSCSI (Drobo 8-drive device) and Windows Home Server (either an HP appliance or building one from an older machine). Will WHS + iSCSI work? If so will it work with an HP MediaSmart appliance or do I need to build a server for this particular task?

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• iSCSI Disconnects every 30 minutes

  - by Steve Evans

  Every 30 minutes, almost by clockwork, a get the following error on my Windows 2008 R2 servers: Log Name: System Source: MSiSCSI Event ID: 113 Level: Warning Description: iSCSI discovery via SendTargets failed with error code 0xefff0003 to target portal *10.2.62.3 0003260 B06BDRV\L4SC&PCI_163A14E4&SUBSYS_045F1028&REV_20\5&cabe3b7&0&30050200_0 I have 12 identically built servers connected to this iSCSI network and they are all seeing this issue. I've updated drivers and firmware levels without any change. Any other obvious things I should try before engaging my network team and the vendors.

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• Install xenserver on iscsi target

  - by Ghassen Telmoudi

  Is is know that Xen Server is based on CentOS, and it is fact that CentOS can be installed on an ISCSI target flawlessly, but I wanted to install Xen server on an ISCSI target I couldn't find a way. I already tried the latest version of xen server 6.2, and there is no obvious way who to do the installation without a local disk. Does anybody have an idea about the subject, or did someone know how to do it? Please share your experience about this subject.

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• What OpenSource iSCSI appliances/apps support windows clusters?

  - by Jimsmithkka

  I have been wanting to experiment with Windows clustering systems in my spare time, so I need a free, preferably open source, iSCSI Target that can support 2k3 and 2k8 fail-over and possibly High availability clustering. I have tried the ubuntu iscsi target package in a vmware environment, but it fails at the 2k8 tests. In simple terms I want to build a "Poor man's San" for windows and have it be able to do more than just be drives.

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• Windows Server 2003 forgets folder shares from ISCSI-Volume after restart

  - by cyntaxx

  Hi, I have running a Server 2003 with the Microsoft ISCSI Initiator. I mapped an ISCSI-Volume and after the restart of the server, the the folders aren't shared anymore. The NTFS-rights are still rigth and the drive letter does not change. Any idea? Thanks, cyntaxx

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• EMC VNX iSCSI setup - unsure about SP/port assignment

  - by pauska

  We have a new VNX5300 waiting to get configured, and I need to plan out the network infrastructure before the EMC tech arrives. It has 4x1gbit iSCSI per SP (8 ports in total), and I'd like to get the most out of the performance until we jump over to 10gig iSCSI. From what I can read from the docs - the recommendation is to use only two ports per SP, with 1 active and 1 passive. Why is this? It seems kind of pointless to have quad-port i/o-modules and then recommend to not use more than two of them? Also - I'm a bit unsure about the zoning. The best practices guide state that you should separate each port on each SP from each other on different logical networks. Does this mean that I have to create 4 logical networks to be able to use all 8 ports? It also gives the following example: Does this mean that A0 and B0 should sit on the same physical switch aswell? Won't this make all traffic go on one switch (if both A1 and B1 are passive)? Edit: Another brainpuzzle I don't get it - each host (as in server) should not have more iSCSI bandwidth available than the storage processor. What on earth does this matter? If serverA have 1gbit and serverB have 100mbit, then the resulting bandwith between them is 100mbit. How can this result in some kind of oversubscription? Edit4: Wait, what. Active and passive ports? The VNX runs in a ALUA configuration with asymmetrical active/active.. there shouldn't be any passive ports, only preferred ones..

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• VMware NAS/iSCSI recommendations - smallish organization

  - by Bubnoff

  I have two VMware servers - ESX + ESXi. Two backup NAS boxes. The current NAS boxes are low-cost and unsuitable for running VMs from. Support NFS only. Slow. My plan is to have a dedicated iSCSI/NAS for storing and running VMs. Two additional low-cost boxes for backup. I'm looking for advice regarding 2 things really: Recommendations as far as VMware architecture/design for a smaller organization. Less than 20 Virtual Machines. 2 servers + 2 x 1.5 terabyte backup NAS boxes. A good NAS/iSCSI box with your recommendation on RAID config ...I would go with 6 or better. I'm trying to design an installation that is both fast and reliable/redundant. If you have any experiences to share or your current configuration including network design ( switches, fiber ...etc ), I will be enormously thankful. I'm not married to this idea, so if you have a design not using iSCSI NAS boxes ...let er rip. Cost? Can we stay around $5,000 ( on top of already stated components )? Links to info are welcome also. Thanks for reading! Bubnoff

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• Creating Emulated iSCSI Target in a Lab/Testing Environment using Windows Server 2008 R2

  - by Brian McCleary

  We have a single server running Windows Server 2008 with Hyper-V installed running 5 virtual machines. I have purchased a second DELL R805 Server so that we can create a fail-over cluster to our current R805 that is currently in production. Right now, our R805 connects via iSCSI to a MD3000i iSCSI SAN. Before we try to roll out the second server and clustering to our production environment, I want to be able to test and "play with" the clustering features in our lab before rolling it out. The problem is that I don't want to spend a couple thousand dollars on another iSCSI SAN server just for testing. I already have two servers in my lab that are installed with Windows Server 2008 R2 64bit (one is the R805 and another spare desktop that was laying around) and with the Hyper-V roll enabled that should be ready to test with, but I don't have an iSCSI target to use as the Cluster Shared Volume. Is there anyway to install, either on a Hyper-V image or on a external spare computer that we have some sort of emulated iSCSI target? In our lab, we obviously don't need a real SAN, just something that we can test out how to setup the clustering properly outside of our production environment. Any advise is appreciated. FYI - I have read Jose Barret's blog on WUDSS at http://blogs.technet.com/josebda/archive/2008/01/07/installing-the-evaluation-version-of-wudss-2003-refresh-and-the-microsoft-iscsi-software-target-version-3-1-on-a-vm.aspx, but it seems awfully complex. I'm hoping for an easier solution.

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• Problems with 2 ISCSI connections esxi 3.5

  - by rphilli5

  I am running a dell poweredge 1950 with 4 nic cards. 1 is bonded to SAN #1 on 192.168.90.xx. The second SAN is on a separate network - 192.168.7.xx The network adapter can view the ip range of the san and the NIC can be pinged from 192.168.7.xx range. vswitch1 and vswitch2 are configured identically except for the ip address. The second SAN has been added to the iscsi software adapter but the SAN is never recognized. I can connect to the SAN from other machines on the local network. Is there something else that needs to be configured for the iscsi software adapter to know which vswitch to use?

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• Dedicated NIC or dedicated port for iSCSI?

  - by Newt

  When spec'ing and configuring a machine that will utilise shared iSCSI storage, I've read a lot of documentation which suggests a dedicated network adapter should be used for iSCSI communication. That makes a lot of sense and I have no problem with it. The question I do have, is this - should that suggestion be taken to mean that a separate physical NIC should be used, or will a dedicated port/ports on a dual/quad port NIC be just as good? My suspicion is that simply using dedicated port(s) on a shared NIC would be just as good. Any input greatly appreciated.

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• iSCSI RAID1 on two servers, fail scenario

  - by Franz Kafka

  Hallo, a simple question: Image I have two servers, each server has two disks in RAID1. Now I merge the two arrays with iSCSI to one RAID1 disk. Two questions: Can I do the merging of the 4 disks in one go? I can't image how. First I will have to install the os, and then the raid controller is already set up to RAID1. If a whole server fails the other server would continue working without any problems? Does iSCSI notice that the other server is missing and treet this as if the two disks were broken? When the server comes back online the data is resynced, as if I installed new disks into a array? Can I image that this way? Thanks alot.

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• Help with proposed iSCSI SAN VMware implementation.

  - by obsidian

  We have four (with plans to grow to four more) Dell servers with 6 NICs. They are running VMware ESXi 4.1. We would like to connect all of them to an Openfiler iSCSI SAN via HP ProCurve 1810G switches. Based on the design below, is there anything I should be concerned about or anything unusual that I should look out for when making the iSCSI network configurations on the servers, switches and OpenFiler? Should I bond the connections on the servers or simply setup them up for failover? The primary goal is to maximize IOPS. Thanks in advance.

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• What is the advantage of iSCSI over SMB?

  - by sofakng

  At my house I'm running a Hyper-V server with a Windows Server 2008 R2 VM acting as a file server. Files are shared across my network using SMB. (Also, the machine is using a PERC 6/i RAID card but I don't think that's important) I'm thinking about setting up a dedicated SAN (iSCSI) machine and then switching my Hyper-V server to ESXi. What are the advantages of using iSCSI versus SMB? I think I would still need a file server OS (eg. Win 2k8) sharing files via SMB so I'm not sure the end result would be any different than my current setup...

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• Jumbo Frames, ISCSI and ESXi

  - by vlannoob

  I have enabled Jumbo Frames (9000) in ESXi for all my vmNICs, vmKernels, vSwitches, iSCSI Bindings etc - basically anywhere in ESXi where it has an MTU settings I have put 9000 in it. The ports on the switches (Dell PowerConnects) are all set for Jumbo Frames. I have a Dell MD3200i with 2 controllers, each with 4 ports for iSCSI. Each of these ports is set to Jumbo Frames (9000) as well. So now the questions: Do I need to log into each Windows Server VM I am running and delve into the NIC properties and manually set it to Jumbo Frames in the NIC properties in the device Manager as well? Whats the best way of testing that Jumbo Frames are indeed working as intended?

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• Esxi with iSCSI SAN slows down with many multiple VMs running

  - by varesa

  I have a server with ESXi 5 and iSCSI attached network storage(4x1Tb Raid-Z on freenas). Those two machines are connected to each other with Gigabit ethernet, and a procurve switch in between. After a while, if I have many(4-5 or more) vms running, they start to get un-responsive (long delays before anything happens). We are trying to find the reason behind this. Today we looked at esxtop, and found that DAVG of that iSCSI LUN stays at 70-80. I read that +30 is critical! What could be causing those high response-times?

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