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Questions tagged [storage-area-network]

A SAN is a Storage Area Network, for providing block-level access to storage subsystems across a network.

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Fastest solution to use FTP/Aspera/MediaShuttle with SAN network

At my postpro studio we have a SAN Network (Stornext 6). There is also a MediaShuttle and FTP server in a VM on the firewall (I know, I know... Not my fault, really xD). The VM is sharing SAN over ...
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2answers
1k views

Cannot join CIFS server to a active directory domain

We have a VNX5700 in our environment , it had two datamovers(one as primary and the other secondary). Recently we added a third datamover to the array and configured it as an active DM , so we will ...
2
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3answers
55 views

Understanding Disk Array Availability

I'm new to this thus I'm trying to understand about calculating Disk Array Availability (DAA). What I have understood so far is that availability is always 1, and Failure = 1÷MTBF, and that is all I ...
3
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1answer
28 views

MPIO on Win Server 2k16 w/ EMC Unity

I have two Dell R630's running Windows Server 2016, slated to be Hyper-V hosts but not yet clustered, attached to an EMC Unity array via fibre channel through a pair of Brocade 300 SAN switches. The ...
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1answer
43 views

CEPH for video streaming? [closed]

So i have a video streaming app (HLS) and was wondering if using CEPH or GlusterFS would be a good idea vs using plain SAN storage? (from performance prospective) In general is software defined the ...
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1answer
4k views

FreeBSD VMware and CAM status: SCSI Status Error

I'm running a FreeBSD 10.1-RELEASE-p19 on a VPS (VMware). My ISP is experience a rapid data growth, and these messages spontaneous started to show up in our logs a week ago. Sep 25 09:00:50 srv03 ...
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7answers
5k views

How to tell if linux disk IO is causing excessive (> 1 second) application stalls

I have a Java application performing a large volume (hundreds of MB) of continuous output (streaming plain text) to about a dozen files a ext3 SAN filesystem. Occasionally, this application pauses for ...
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0answers
11 views

Mount the Vplex Virtual Volume ( LUN ) Xen Server

Hello ServerFault members, Please help me with this issue. I am in very strange situation with my Xenserver environment. I am trying to mount the Dell EmC ( Vplex LUN ) to the Xen server HA and when ...
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0answers
15 views

Windows Server guest changes and ramifications after being migrated to SSD?

This particular environment, it's VMWare guests that have been moved to all-flash SAN, but that shouldn't be particularly relevant. I'm quite familiar with >winsat formal from SO questions like ...
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0answers
19 views

Dell EqualLogic PS6010E Network Setup

We recently got a PS6010E and going through setup, I put in all the IP info we are planning on using, and when I get to the part where it says to go to http://[group-ip-addr], I am unable to connect. ...
8
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1answer
630 views

Using non-certified hard drives in Dell MD3220 storage array

Is it possible to use non-certified hard drives in a Dell MD3220 storage array? I ended up getting 3 new drives that were the EXACT same model number as the existing ones. Then I bought the drive ...
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0answers
12 views

3par OS location

As a complete 3par Newbie I have a simple question about the OS of the Storage-System. Is the OS on a 3par stored on it's controllers or on Disks like in some EMC-Models. When I have an empty 3par-...
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1answer
1k views

Trouble bringing a cloned cluster shared volume disk online

I have a Hyper-V cluster (2008 R2) with a CSV that I want to clone. The CSV is on a fibre channel SAN (HP MSA M3 P2000 G3). I cloned a volume from the SAN side of things, and have mapped it to my ...
2
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1answer
38 views

Figuring out how storage is configured to Hyper-V cluster

I am presented with a Windows Server 2016 Hyper-V cluster (2 nodes) and the nodes are connected to an HP MSA 2040 storage (SAN?) with direct fiber connection. I am trying to figure out how the ...
2
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2answers
1k views

Clustered file systems as XenServer storage

I want to use shared storage for a XenServer environment with 4 host servers which are running various VMs under XenServer. Planning to use 2 extra servers as storage with high availability of some ...
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5answers
71k views

SSH / SCP Server on Windows [duplicate]

Possible Duplicate: What is a good SSH server to use on Windows? Can anyone on the SF community recommend a trustworthy/easy to set up SCP server for windows. I do not want to go through the ...
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2answers
87 views

Ubuntu Linux - Shared VHDX

I have two Ubuntu web servers using a shared Hyper-v vhdx file in a Hyper-V cluster as a data drive because the Nimble SAN does not support NFS Connections. However, while both servers are able to ...
2
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1answer
31 views

What is difference between path and connection in iSCSI volume?

we have connected few Iscsi volumes. When we execute Get-IscsiConnection it shows connection between target IP address and initiator IP address. But when we execute mpclaim.exe -s -d It ...
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1answer
303 views

Lost LVM meta data, but filesystem still works

Here is setup: 70TB JBOD as part of a SAN, split into 5 LUNs (4x15TB and 1x10TB). File server running Centos 7 connects to the 5 LUNs via iSCSI, using iscsiadm, across two netowrk paths, for a total ...
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0answers
61 views

Windows Server 2016 UEFI Boot issue

I am trying to get a fresh install of Windows Server 2016 working on UCS B-Series blade with UEFI and boot from SAN and seem to be hitting a brick wall. The OS installs and I can see the Windows Boot ...
2
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2answers
1k views

XenServer, mapping SAN LUN to VDI

I have a few XenServer 6.2/6.5 hosts, and ZFS SAN datastore, providing iSCSI exports for VM storage. It's not an optimal solution to export huge 1-2 Tb LUN as XenServer LVMoiSCSI SR, because: a) no ...
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1answer
1k views

HP MSA P2000 G3 SAN Performance

I have a three server Hyper-V 2012 cluster which points at LUNs based on an HP MSA P2000 G3 SAN for the virtual hard disk storage. I am experiencing speed issues and one thing that has been ...
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1answer
49 views

How to do Iscsi deep discovery?

In our storage array we change the discovery IP. Once the discovery IP is changed, the Multipath connection has to be rebalanced (It should make connection again with new discovery ip). But it is not ...
3
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1answer
44 views

How to find which MPIO path is being used for IO?

We were experimenting MPIO with our Storage array. We saw the Get-Iscsisession and Get-Iscsiconnection cmdlet to find the paths created. But during IO ,i would like to know which path has been used. ...
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0answers
27 views

Spinning up disks in FC shelf

I own an Engenio 4600 FC shelf, which works apart from flaws regarding missing diagnostics pages quite well as a JBOD in combination with Linux and ZFS. The only problem I need to solve is if I ...
3
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1answer
93 views

How to check Unmap event in windows server 2012 R2?

We have created few volumes in storage array. Via Iscsi initiator those volume have been added into host machine which is Windows 2012 R2. For few volumes when we delete the contents ,the volume size ...
2
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3answers
108 views

Which RAID level for virtual machines in SAN

I have Dell EqualLogic PS5000E iSCSI Array. I have connected this SAN in servers directly. I used Jumbo Frames. In this case, everything is ok. My storage is ~25TB. Now, I need to choose, which RAID ...
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0answers
134 views

fsck.ext4 complaining that the device is in use. Can't find what exactly is using it

Our setup is a 3-node RHEL 7.3 bare-metal Kubernetes cluster running on Docker. We have a multipath FC SAN block device discovered on all three nodes. This device is used as a Kubernetes Persistent ...
3
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2answers
1k views

How to configure StarWind Virtual SAN Free

I tested my environment during the 30 day trial and really liked it but now I want to make it work with the free version. I started over and followed these walk-through from Starwind Creating HA ...
3
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2answers
2k views

Can Dell storage servers be upgraded to full OS installations?

I have a Dell NX3000- which is a Windows Server 2008 based unit. It has an additional cabinet full of drives attached, as well. I have spare licenses for Windows Server 2012 Standard that could be ...
1
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1answer
82 views

How to find if FC-Switch using port-zoning or not Brocade FC 300

I have to replace a HBA on RedHat5.3 due to card failure. A tech guy asked me that "Check your FC-Switch Zoning Type of Port Zoning or not? , because if host accessed by WWNN, you'll need to update ...
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1answer
85 views

Dual SAN controller failure [closed]

I am new to storage but facing a serious disaster issue of the failure of Dual SAN Controller. Don't know whether this is a right place to ask this question. Anyways the problem is, None of the ...
2
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1answer
729 views

What effect does HBA queue depth and max transfer size have on transmission overhead?

This is a pretty straightforward question. What, if any, relationship do queue depth and max transfer size a QLogic HBA have on management overhead on a transmission? What I'm hoping to learn how (if ...
3
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1answer
54 views

Does data reduction work cross datastore?

I am the proud owner of a Unity 400F all flash SAN connected through FC. I have multiple datastores setup for my vm infrastructure and I was wondering if data reduction (what EMC calls their combined ...
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1answer
31 views

steps to troubleshoot server when it fails to attach and mount LUNs

How to troubleshoot when Windows Server 2012 R2 connected to SAN via iSCSI fails to attach and mount the LUNs from the iSCSI target
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1answer
39 views

Unused switch ports in Fabric (brocade)

I am very new to storage but we are having trouble with performance on our SAN. While troubleshooting I found that one of our switches in the fabric (1 HP C7000 with 2 flexbric interfaces connected to ...
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1answer
62 views

Clean LUN on HP MSA P2000 G3

I am trying to deploy a self-host oVirt Engine on a SAN HP MSA P2000 G3 LUN. I created a Vdisk and a volume via the Storage Management Utility (SAN GUI). The volume is already containing data because ...
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0answers
119 views

Xen pool upgrade from 6.5 to 7.6

We are running a XenServer pool on an IBM BladeCenter S with 4 HS22 blades installed. 3 of the blades are in a pool and the fourth not. The blades have no internal storage and all get it from the ...
2
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1answer
385 views

low network performance between Citrix XenServer and Linux iSCSI storage

I have two SuperMicro servers directly connected (no switch) by two 10 GBit Intel X540-T2 NIC. One server runs Citrix XenServer 6.2, the other runs Debian 7. I then installed open-iscsi and ...
2
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5answers
360 views

SAN storage in Google Cloud

If I need to move a 100TB SAN (block) to GCP what are the options we have? As per my understanding it has to be a persistent disk. But current max limit per disk is 64TB. So I will need two disks. But ...
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3answers
3k views

Rancid scripts for Brocade Fiber Channel Switches?

I am looking for Rancid scripts for my Brocade 5100s. Does anyone have a secret stash they would be willing to share?
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2answers
444 views

Reclaim deleted space on SAN from thin provisioned LUN with zeros on Windows

Dear Data Storage Experts, We are using a SAN attached thin-provisioned LUN on Physical Windows machine from a storage vendor. Storage chargeback is based on high watermark (deleted space not ...
2
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0answers
10 views

moving 4g AIX server to 6520 brocade switch, i/o errors on host [closed]

Recently tried to move several HP Unix (AIX) servers from an old 5300 brocade switch fabric to new 6520 brocade fabric. The old zones were inactivated and old storage port id's were kept intact for ...
2
votes
1answer
563 views

Software to repliacte data in a Cluster Shared Volume in real time from DAS attached to Server 2k8 R2 HyperV cluster to an identical setup?

Are there any software solutions that will be able to handle replicating the data from one SAS based DAS (a Dell MD3200) attached to two R410 servers running clustered Server 2008 R2 Hyper V instances ...
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2answers
859 views

Vtrak E610F console issues and recovery

I have been assigned an E610F Vtrak Storage unit, the previous admin left and did not leave any documentation, so IP Address for Management and Credentials are unknown. I tried using accessing the ...
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1answer
213 views

Compatible hard drives for Powervault MD3000i

I recently acquired a Powervault MD3000i with several hard drives already installed, and was looking to see if it were possible to purchase additional hard drives without going directly though Dell. ...
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1answer
20 views

Setting up VM's with a SAN

I am currently in the Process of virtualizing my infrastructure setting up a SAN As well as a complete replica as a DR site. I have purchased the following Equipment (plus all other needed equipment) ...
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1answer
4k views

SAN: FC vs SAS vs iSCSI

I am currently preparing for an exam. I thought FC (Fibre Channel) was the transport protocol for SCSI and SAN. But now I read, that you have to decide if you want to use FC (SCSI), SAS or iSCSI in an ...
1
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1answer
234 views

Why multipath devnode change after reboot?

As I command multipath -ll, the output show like this. ocr3 (149455400000000000000000001000000ca0200000d000000) dm-9 IET,VIRTUAL-DISK [size=980M][features=0][hwhandler=0] \_ round-robin 0 [prio=0][...
3
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0answers
221 views

FreeNAS iSCSI use - recommended percentage?

I have set up a FreeNAS system on a Dell R310 server with 4x4TB drives on a cross-flashed H200 controller in FreeNAS' own RAID10. I want to use that storage entirely for VM containers that run on ...