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

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Is WinSAT reliable to test the speed of my iSCSI, Fibre SAN, under bare metal or Virtualized?

I discovered the following command in this whitepaper: WinSat disk -read -ran -ransize 4096 -drive c Is it reliable to use against a SAN, or iSCSI drive? I would like to compare the output of ...
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199 views

How to configure multipath using Intel X520-SR2 10GB on Oracle Linux 6.2?

I've installed the Intel x520-sr2 Ethernet/Fibre card into a server that has Oracle Linux 6.2 Installed on it. When I boot the server I can go into a QLogic menu (screen has something for Intel on ...
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1answer
724 views

cPanel web servers mounting home partition to a NAS or SAN

I currently have 2 cPanel web servers that are little 1RU dual cpu quad core xeons. They have a lot of resources for processing and handling web requests, and never exceed more than 10% cpu usage. ...
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33 views

Backup slowness after changing the SAN switch

We have a netbackup environment Recently we changed the connectivity of two of our sql servers(cluster servers) from one SAN switch(MDS 9509) to another (MDS 9513) followed by which we are ...
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1answer
165 views

EMC ESRS stops working when it is VMotioned

EMC is on site and told me: The ESRS SAN monitoring solution will cease to function if that host is VMotioned In case anyone doesn't know, the ESRS is a dial home solution that works over IP. ...
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1answer
86 views

Network issues regarding p4300 SAN - cannot manage p4300 through CMC

I am having an issue with my p4300 LeftHand SAN. It is a 2 node iSCSI system. Each one has 2 nics which are teamed into a cisco switch. The VMware cluster is connected into this switch as well with ...
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1answer
106 views

fdisk -l only displays boot partition

I have a SAN, and it's able to read and write to the 50TB RAID just fine, but when I run fdisk -l it only lists the boot partition of the SAN server, and doesn't display anything about the other ...
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1answer
279 views

SBD killing both cluster nodes when there are even small SAN network problems

I am having problems with stonith SBD in a openais-based cluster. Some background: The active/passive cluster has two nodes, node1 and node2. They are configured to provide an NFS service to users. ...
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260 views

SAN failover with Solaris 11 express

Is there a good solution to provide failover between two identical servers based on Solaris 11 Express? We replicate data between the two SANs now, but want to setup a failover solution. I have ...
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428 views

Shared storage for VMs without dedicated storage server

On a legacy project I've got 4 physical machines (servers, PM's) where each server has access to the SAN and fixed-space by it's own two devices (via device-mapper multipath). The local disks of the ...
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42 views

NetApp filer uses more amps when one power supply is turned off

We have two old NetApp FAS3050 filers at our colo. We also have an upcoming maintenance window that will take our circuits offline for an extended period of time. Our circuits are pretty much maxed ...
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2k views

iSCSI issue; “the media is write protected”

i've got some serious issues with w2k8 r2 standard and iSCSI controller. i'm running dell server, connected via ethernet to synergy NAS, which is handling LUN via iSCSI. i'm using ms iSCSI initiator ...
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794 views

Volume manager of Windows Server 2008 R2 does not show all iSCSI volumes

we set up a backup server (Win2k8 r2) for our VMware infrastructure which uses an iSCSI SAN for storage. The backup server has to be connected to the SAN for Veeam to be able to backup virtual ...
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58 views

HP LeftHand StoreVirtual VSA host affinity

I am testing the HP LeftHand StoreVirtual VSA for ESXi 5.x (a 3 nodes setup, hosting the VMs in the same hosts that have the VSA appliances). Is there a way to define some sort of 'ESXi host to VSA ...
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43 views

Mapping LUNs to drive slots on a MSA2312i?

I'm working with an older MSA2312i. I really need map the current LUN configuration to associated slots via the SSH so I can make it scriptable. Is there a ready way to do so? I would have thought a ...
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48 views

What technical issues should I be aware of when re-mapping a LUN from one host to another?

I inherited an IBM System Storage DS4000 SAN with an AIX environment running Oracle RAC (3 nodes). One of the nodes crashed, so I got the system up and running with 2 nodes; however, the node that ...
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154 views

What would cause RMAN backups over NFS to kill SAN performance?

I've been trying to figure out this problem for several weeks now, we are using an Exadata that runs nightly RMAN jobs to backup the database to a NFS mount. When these jobs occur, the average latency ...
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22 views

WS2003 network drive gets deactivated after restart

windows server 2003 OS runs sql backups regularly and periodically i have to restart once in a while. when the restart takes place the network drive(H) becomes deactivated which i do not understand ...
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83 views

Running SpinRite on SAN attached LUN with NTFS corruption

Got a customer that has an issue with NTFS corruption that is popping up on SAN attached storage. The LUN is RAID-10 (4:1 spindle ratio). The machines are Windows Server 2003 (64-bit), and they are ...
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47 views

multipath -l vs -ll

What system information is multipath -ll reading that multipath -l does not? From the RHEL DM Multipath Guide -l Display the current multipath configuration gathered from sysfs and the device ...
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295 views

How to install Ubuntu Server on SAN Storage with Multipath?

I have HP ProLiant BL35p blades and I want to install Ubuntu Server 12.x on them in order to do virtualization with OpenStack. The storage is made of HP StorageWorks SAN, which is connected to the ...
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178 views

Virtual fiber channel HBA in Solaris

We are trying to set up some virtual Fibre Channel HBA's in Solaris. This seems to be possible with NPIV. Creating NPIV's in a Solaris global zone works fine, but passing that NPIV to a zone didn't ...
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178 views

Dell Equallogic SAN - 4000 series to 6000 series connectivity issues

I have a 4000 series in production with two physical NICs and a group IP. I have a 6000 series in a DR site with four physical NICs and a group IP. 4000 series NIC1: 10.0.12.2 4000 series NIC2: ...
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314 views

XenServer Offsite Replication

I am trying to find the best way to migrate my VHD's to my DataCenter offsite for DR purposes. Currently I have a number of Xen Stacks setup as the following: Dual RAID ISCSI SAN multipathed to at ...
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487 views

Replacing LeftHand SAN Hard Disk Outside of Warranty / Service Contract

I am working with 3 clusters of LefHand SAN iSCSI storage arrays. The modules are all older NSM 150s and NSM 160s (super micro server hardware, sata disks). The workload is low priority and all ...
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198 views

Rebuilding a SAN

Okay, because of a mistake in adding disks earlier, I am going to rebuild my SAN. It is an HP MSA2000, and I am using 2 Windows Server 2008 servers in a cluster. Please review my plan and let me ...
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411 views

Celerra: zoning done to data mover

I have a small confusion-while zoning to data mover, wwn zoning in preferred. Which should be Node 50060160c1e10d7d -please correct me if I am wrong. Because in my environment I see it is zoned to SP ...
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35 views

How much throughput increase to expect from link aggregation (LACP/802.3ad)?

I identified that data transfer within my cluster will be bottlenecked by the network interconnect (I'm saturating the dual SAS connection to my storage with sequential workloads), and I'm undecided ...
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17 views

How to configure HP MSA20000 G3 on a HP Proliant DL380p G7 Server on debian squeeze

I have configured a HP MSA2000 G3 attached over fiber channel to HP DL380 G7 servers and have configured it initially over Microsoft Server 2012 Standard edition and have set the identifiers and ...
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103 views

zfs recovery after hardware failure

My ZFS storage hardware failed including the rpool disks. I installed a new server and tried to import use zfs import -f poolname. I am able to see the pool and the disk utilized. But I am not able to ...
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211 views

Detect Fibre Attached Tape Drive in Red Hat Linux

I am running Red Hat Linux 6.4 and I have one Fibre Attached Tape Drive which is not visible to the OS. I also have the WWPN of the tape drive. The server has two Qlogic HBA Card with two port each. ...
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59 views

Intransa Server Failure/Software

Our agency has an IntransaBrand VideoAppliance storage server. It is currently running a Windows Vista client on server equipment and has 2 RAID arrays. One is a RAID 5 (4 x 2TB Western Digital ...
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104 views

Destination Folder Access Denied error when accessing SAN share (EMC Celerra File Server)

There is a shared folder hosted on an EMC SAN to which Everyone has Full Control to the share's root. The SAN's Administrators group is set as the shared folder's owner. Beneath the root are a number ...
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46 views

How to manual config hot spare coverage for diskarray IBM DS and Dell MD series?

I have disk array with many expansion enclosure with mixed disk type (SAS 7.2k and SAS 15k for example). I want to have one hot spare per one enclosure. -Enclosure 0 with SAS 15k will have one ...
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28 views

HP X1600 G2: Convert a Shared folder to a VHD?

I have an HP x1600 G2 and I seem to have made a mistake. I partitioned more than half the space available as a Shared Folder. I have now mostly filled that volume with data, approximately 2TB. I need ...
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38 views

Splitting Multiple Files in Windows

We have a 21TB LUN full of images that are approx 600K in size in multiple sub folders on the disk. We are trying to split the 21TB LUN into 8 smaller LUNs that are about 2.6TB a piece in order to ...
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93 views

EMC CX3-10c Fault Condition won;t clear

We have an old CX3-10c from Dell that had both Standby Power Supplies (SPS) fail. This obviously caused a fault on the system and disabled the cache. We have replaced the SPS's and they test fine as ...
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308 views

No disks were found on which to perform cluster validation tests

I am trying to make a cluster of two Hyper-V machines running Windows Server 2012. There is a SAN available in which I have created several partitions to use such as J drive, K drive L drive etc. ...
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44 views

Unable to login into CISCO SAN switch management IP

when i try logging into the switch through device manager it throws the below error: "busy network,no rout,snmpd unresponsive" The physical connections between the san switch and the network switch ...
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122 views

ccs_tool addnode and addfence error invalid option — 'C'

I'm installing GFS2 on centos 6 with SAN and fiber channel. I followed this link: ...
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40 views

SANHQ iSCSI network access

Trying to setup and configure SANHQ on a virtual server. Network I have patched 1 vmnic from each ESXi host into the iSCSI switch and configured the switch ports to access the same vlan as the san. ...
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236 views

Server 2012 cluster - SAN volume - failover not working

The following configuration is available: - 3 HP SAN disk Enclusores / 2 SAN controller; HSV200 (FC) - 2 HP Brocade SAN switches - 2 HP blade servers, each with a QLogic FC HBA QMH2462 - SAN volume is ...
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54 views

How could I share data from a SAN?

I am considering deploying a SAN but I have found contradictory information. The thing is that I would like my cluster nodes to be able to read the same data from a unique source (I have a ...
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54 views

Cannot login to ISCSI Target - hangs after sending login details

I have an ISCSI target volume, to which i am trying to connect using CentOS Linux server. Everything works fine, but cannot its stuck at login. Here are the steps i am performing: [root@neon ~]# ...
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122 views

Virtual vs. Physical server reading from UNC path error

Setup: We have an environment that is heavily IO bound (we are reading hundreds of images on a web page and hundreds of connections at peak times). Our environment consists of 4 physical servers and 4 ...
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315 views

Setting Up Apache on HyperV

We recently had a disastrous transition from a single server (Win2008 server, 4 dual core 2.8GHz processors, 24G RAM) to a much larger, faster Hyper-V server. We run Apache 2 and PHP 5 (both 32-bit) ...
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242 views

install network drivers on a diskless windows 2008 R2

I have a dell r715 with a Broadcom NetXtreme II 1 Gigabit Server. I am booting my Windows Server 2008 R2 through iSCSI from a SAN. I want to install my network drivers. When I try to install my ...
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226 views

Best way to architect and attach 5TB of storage using a VM and a SAN?

I've been cautioned not to create huge LUNs on a SAN (ours is effectively 19TB) but I admit I'm not very knowledgeable about storage issues. As far as application requirements, I need a 5 TB mount ...
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148 views

vSphere - datastore falling off a host

Recently we have been running the vCheck powershell script daily in order to help in monitoring our vSphere ESX 4.0 environment. One of the oddities that we have been seeing is that some of the ...
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122 views

ESX host to SAN migration issues

This is an odd issue I've had with a network I formerly admined. We found a workaround, but the core issue remains unknown to me. Situation is a pair of ESX hosts in a cluster. Each had their VMs ...