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

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create SMB share on a clustered vm or dedicated server

I have a cluster that consists of 2 IBM servers, 8Gbps Fibre channel based SAN and 1 storage server (IBM Storwize v7000), i run virtualization on that cluster (Win2012 Hyper-V) but also want to use ...
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47 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
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47 views

How can I distinguish between SAN zoning and LUN assignment issues on RHEL6?

From Red Hat Enterprise Linux 6 how can I tell the difference between a SAN zoning problem (e.g. cannot reach the storage at all) versus a LUN masking issue (e.g. LUNs not assigned to the right HBA ...
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23 views

Dell R730 with QLogic 2660 16Gb FC HBAs connected to a Brocade 300 8Gb FC Switch? Will it work?

We have a standard shop with 3x Hypervisors running VMware vSphere 6.0. The hypervisors are currently connected via 8Gb FC link to a Brocade 300 (8Gb FC) switch, which is then connected to our ...
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4 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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18 views

New SAN space presented cause issues with Win 2008r2 cluster (wont reboot and disk manger wont load)

I have an issue where I have a 2 node Win 2008 r2 cluster with SAN attached storage. Existing storage is on an older array but we are being migrated to a newer one. When the storage team "Zones" new ...
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36 views

How do I power this SAN safely and with redundancy on the power circuits?

Location: USA We are looking at powering a new Storage Area Network (VNXe3200). There are 10 units in total, each with two power supplies for redundancy. Assuming we can do either single-phase 120V ...
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20 views

IOmeter: Avoid caching and Raw Devices

When testing IOmeter I know always need to be avoid hitting the cache if the logical drive with the OS is testing, some I have some question about it: Do I need to avoid the memory on the controller ...
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27 views

Exchange 2010 New database on a SAN - best practice

We currently have a single database (on it's own Netapp Volume and LUN) and a separate Volume and LUN for the transaction logs. So, to map it out as the server sees it: C:\ Server Install D:\ ...
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27 views

Unable to view LUNs exported on Linux via fibre switch brocade from IBM San Storage

I have problem mapping LUNs to my linux box from IBM San Storage Configuration: Host: Debian wheezy Host: Fibre controller QLogic 4Gb dual port DS4700 San Storage using Storage manager 10 brocade ...
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39 views

How do I connect a disk array? [closed]

I am just starting out with servers and was recently given an IBM DS3200. It is my understanding that this is a disk array, which is just storage that can be attached to a SAN. Am I correct in that ...
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41 views

Removed cluster disk that wouldn't come online, now it wants to be formatted. Can I recover the data?

I inherited a failover cluster hosting several VMs and some storage volumes. It uses a fibre-channel SAN for storage. I updated firmware on the SAN controllers recently and when it came back up one of ...
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76 views

Can increased disk throughput increase CPU utilization?

We recently upgraded the storage in our data center and migrated all our production systems to it. We noticed that in one machine (an HP_UX IA-64 Oracle database server for SAP), the CPU utilization ...
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1answer
72 views

Centos 6.7 Emulex LPE12002 on Dell can see any targets/LUNS on HP EVA4400 SAN

As the title indicates -- I have a new Dell R730xd running Centos 6.7 with all updates loaded, etc. I also installed the Emulex utilities, etc. The issue is that nothing I try (reboot / ...
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13 views

Correct cable positioning for HP-EVA 4400

I've bought for testing a 4400 hp eva SAN storage. I see 2 controller i/o for disk and 2 controller on hsv300 controller. I have only one disk shelf On manual i read put DP1B with I/O BP2 and BP1A ...
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47 views

SCSI queue depth / command queue settings

I two servers with about 100 LUNs presented to each from an IBM V7000 (Storwize). Each LUN has 8 paths - 2 FC ports x 2 FC switches x 2 V7000 heads - so about 800 devices. Devices/paths are managed ...
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157 views

Mixing HBAs in a failover cluster?

I have a two server failover cluster, and for various reasons - they're on mismatched hardware. One has Emulex HBAs installed, the other Qlogic. I'd be twitchy about using two different ...
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24 views

bbwc battery replacement on MSA1000?

Noob warning Would someone tell me where it's located at so I can replace it? This doc tells me it has one. http://h10032.www1.hp.com/ctg/Manual/c00147475.pdf I took the lid off of one this morning ...
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97 views

SQLServer Configuration - How to refute 1 drive on a SAN is same as multiple physical drives

I inherited a performance investigation problem where a SQLServer 2008( and also 2012 ) database has its Data, Indexes and Log files all on a single drive D: The D: drive is actually part of a SAN. I ...
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50 views

Backup strategy for LVM file sytem on NFS file server connected to SAN

I have setup a server (CentOS) on which I have connected to several LUNs from a SAN via iSCSI then multipath, resulting in multiple physical volumes I can use for LVM (dm1 ...). From the file server, ...
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29 views

IBM DS8300 harddisk replacement

Does anyone have experience with IBM DS8300 harddisk replacement? I have problem with disk failure on some DS8300 and I don't have any experience with storage system before. If there any article or ...
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102 views

Can't use hostnames to connect to SMB shares, only IP addresses

Right now I have a cluster of servers connected to a single storage server. 3 Hypervisors, 1 Storage Server The ethernet interfaces on the hypervisors are on a different subnet than the ethernet ...
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1answer
56 views

Best practices for migrating to new SAN

My collaborator is splitting from his institute and wants help moving his application and data off the institute's network. And of course things are moving quickly. He has 12 TB of image data on a ...
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1answer
295 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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75 views

How Data Moving in Storage Area Network

I have a question about how data moves through a SAN. For example: Within an iSCSI SAN if Server A is mounted with a SAN disk and wants to copy data to Server B which is also mounted with a SAN disk, ...
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84 views

SAN: How to determine amount of LUN and CSV

We have inherited Hyper-V environment (2008 R2) with SAN storage (HP4500 hardware). Two hosts and two SAN's for redundancy. Whilst I understand virtual machines well, I guess, my knowledge of storage ...
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22 views

Trying to add 2nd iSCSI VDS to XenServer, receiving error about LUN already used by other SR

I've stepped out of my comfort zone here. Some background. I just provisioned a 2nd vdisk+volume on a HP MSA2000. This SAN is has another vdisk+volume linked to Xenserver. I set the mapping to the ...
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59 views

First Exchange 2013 design for on-prem SMB. Did I miss anything? [closed]

Seeing as this is my first design, I'm hoping to make sure I haven't missed any glaring issues before deployment.
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21 views

SAN, BROCADE and WINDOWS SERVER, filesystem trouble

I'm building a DR infrastructure using 4 Servers, 2 Eternus Fujitsu and Brocade 300 Switches. All configurations are done: zoning, paths, LUNs and so on. I have a situation: When I create a file ...
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217 views

NAUbackup - Xenserver 6.5 Backup Solutions

Has anybody every successfully used NAUBackups for xenserver 6.5 and had their backups go to a SAN storage repository? I see the default script backs up to an NFS share but I am trying to avoid NFS ...
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Is it possible for a UNC path to a SAN be disconnected through overwhelming I/O?

I'm just wondering whether it's possible for a UNC path to a SAN be disconnected through overwhelming I/O? If this is possible, how would one recover from it? This would be a Windows server ...
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55 views

Correctly mounting SAN volumes at boot time

I have a system running Debian Wheezy (7.8) that connects to a storage volume exported via iSCSI using the open-iscsi (version 2.0) software initiator. The iSCSI initiator correctly reconnects the ...
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119 views

Are Dell PowerVault MD3200 EMMs compatible with the MD1200 chassis/midplane?

I have a Dell MD1200 chassis with PSUs, and I have yet to buy the EMM units. I was wondering if I could buy the MD3200 EMMs and have it function as an MD3200 or if I have to buy the MD1200 EMMs. I ...
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82 views

How do I expand a PowerVault MD3000i virtual disk?

I have a PowerVault MD3000i connected to a PowerEdge 1950 via iSCSI. The MD3000i has ~7TB of space. We want to use pretty much all of this space as one large file server configured with RAID 5. We ...
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98 views

3PAR high service time overnight

I've a recently upgraded 3PAR array ( 3.2.1 MU1) , which overnight is getting some high iowaits - to the point where some paths to drop and servers to crash (particularly noticeable with e.g. Oracle). ...
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49 views

Dual HBA's link status and WWN's

I try to configure a brand new SAN configuration with RHEL 6.6. SAN team requested host wwn's for zoning, which I believe are individual hba's wwn's. Anyhow here is my scenario: My hba's are dual ...
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56 views

Simultaneous server crash in fail over cluster

I have 2 servers in a failover cluster. The cluster defines a shared 'ClusterStorage' drive. The drive maps to a SAN device through iScsi. Recently, the 2 servers rebooted on their own at the same ...
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68 views

Transfering Hyper-V VM os to boot Server directly from SAN through iSCSI

I have Hyper-V VMs (main application server 2008 R2 on IBM and MSSQL on DELL), both virtualized in Hyper-V 2012. I have discovered some performance offset when using virtualized OS (Terminal server) ...
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88 views

SAN storage I/O issues [closed]

I have a relatively busy application running on a dedicated server. The spec is 8-core Xeon(R) CPU E3-1240 v3 @ 3.40Ghz 16GB RAM 8TB RAID 10 80GB SSD for MySQL I use Wowza Streaming Server to ...
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1answer
278 views

Configure HP BL460c Gen9 with external iSCSI SAN

Hi I am very new to servers. I have a HP BL460c Gen9 server with 650 FLB controller in Legacy mode. I need to connect this to a external SAN through iSCSI. I am not able to go to the NIC BIOS by ...
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432 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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75 views

What is the best way to connect SAN to OpenStack servers?

There is a OpenStack setup with controller, network and two computing nodes (it will be expanded in future). We plan to deploy Ubuntu on all servers. Also we need a storage subsystem for archiving ...
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74 views

QLE2462 adapter slow transfer rates

Last week, I bought two QLogic Fibre Channel adapters QLE2462 to start learning about Storage Area Network. I put it to two Dell PowerEdge T110 Servers and connected them using two LC-LC duplex ...
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90 views

Providing shared file level storage from a SAN

I'd like to get some advice on a system I'm setting up. I'm not quite sure which way to proceed. The goal is just some basic user storage space (Clients are Linux, Windows, and mac) that is baked by ...
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111 views

How to install Debian wheezy on a multipathed Device

I wanted to know how to install the Debian on Multipathed Luns since i did not found any complete Instructions I like to share my way to do it. Press TAB to enter additional settings. Type at the ...
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1answer
185 views

NetApp - Snapshot Full

I am seeing a bunch of Snapshot Full warning events being generated recently from various volumes on our filers: A Warning event at 22 Jun 10:03 Alaskan Daylight Time on Snapshot ...
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1answer
35 views

NetApp cluster fail to start

I have a big problem with my FAS2020 (configured as iScsi storage for 2 esxi 4 server). I couldn't ping the 2 ip address of the FAS so I connect by the serial port with putty for monitoring the boot ...
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1answer
108 views

Apache Spark infrastructure - combining compute and storage nodes

I have an infrastructure question around Apache Spark, which I'm looking at rolling out in a greenfield project with (at most) approximately 4 TB of data used for modelling at any given time. ...
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128 views

Excel File is not being locked by a certain user

I have a file on a network storage. That file gets locked when its in use by somebody else, except by one person. I had about 5 people test it, and only one user does not get the File is locked, ...
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391 views

Mounting Single San Drive on Multiple Hosts

I'm not sure exactly how to ask this, but here goes. We have a san. Within the san, we have the ability to connect a single volume to multiple systems as a raw disk. The Servers themselves would see ...