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

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2
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2answers
546 views

Multiple iSCSI Targets or 1 that's shared?

On my network I have several types of files I want to save on a SAN like: SQL db's and logs Exchange data Random files Now I'm wondering if I should create one iSCSI Target with a large volume and ...
0
votes
2answers
287 views

How to block some disks from probes on Linux boot?

My linux host connected to SAN with FC interface. It connect with one path, and see some luns, that can't access, because they need anohter path, not available to host. On boot linux probe all lun ...
1
vote
1answer
240 views

Dell Equallogic PS6100x network configuration

So we just picked up a new PS6100x and I'm wondering if I need to setup the ethernet channels myself or is it automatic? It's configured in an HA setup; dual controllers connected to redundant cisco ...
4
votes
2answers
2k views

Can I run iostat on a Synology?

I have a Synology RS812RP+ which I'm using for a little bit of departmental testing. I've stuffed a bunch of SSD disks in it, and I'm curious about monitoring the disk IO. iostat doesn't come ...
1
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4answers
1k views

iSCSI MPIO load balancing with HP P2000 SAN

My setup: A hyper-v cluster with 2 nodes (AMD 24 cores, 64gb ram) connect via 2 procurve 25-10g to a p2000g3 SAN (12x300 GB enterprise SAS 10k 2.5"). Each node is an iSCSI initiator. Problem: When ...
1
vote
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. ...
2
votes
1answer
3k views

What's the difference between a LUN and a Volume?

I don't understand the difference. Is C: or D: a volume and LUN a target like "disk 1" when I go to the disk manager? Except, that 'disk 1" is really an iSCSI target on a SAN?
1
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1answer
2k views

What is the max supported number of SATA devices (using cable adapters) on a Dell SAS 6/iR adapter?

I've got a Dell SAS 6/iR PCI-E adapter. I don't have a multiplier backplane. I'm planning on connecting SATA (non SAS) drives. If I buy cable adapters only (ones that split a SAS connector on the card ...
3
votes
1answer
155 views

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 ...
5
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2answers
2k views

Does adding more drives to a RAID 10 Array increase performance?

I'd like to know if I were to add additional drives to an existing Raid 10 if this would increase the speed of the entire array?
0
votes
1answer
198 views

IBM DS300 SAN, Need to expand partitions on LUN

I have a IBM DS300 SAN, and I have setup one LUN with 2.7 TB. I have this LUN setup with 2 partitions, one 130GB partition, and one 1.27TB partition. I have an additional 1.3TB free space. I would ...
0
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0answers
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) ...
24
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1answer
3k views

How should I set up my Fibre Channel (FC) network?

How do FC switches work, and how should I configure mine?
0
votes
2answers
227 views

wall command + broadcast message not appears on second cluster machine

I have two cluster solaris machine ( machine1 , machine2 ) I have connection between two machines ping and ssh work fine ( cluster is fine ) more /var/tmp/mesg TEST I execute the following ...
5
votes
1answer
2k views

Configuring HP “Multifunction” NIC for iSCSI SAN

I am about to implement a SAN here using a HP P2000; the SAN itself is on-order (ETA a couple of weeks) so in the meantime I'm getting the rest of the equipment up and running. The SAN has ...
29
votes
3answers
4k views

Tuning iSCSI storage

This is a Canonical Question about iSCSI we can use as a reference. iSCSI is a protocol that puts SCSI commands as payload into TCP network packets. As such, it is subject to a different set of ...
1
vote
1answer
1k views

vSphere 5/Dell MD3000i multipathing configuration clarification

Revisiting an older vSphere setup with two Dell 1950s, 4 NICs per host: esxi1 and esxi2 for simplicity sake. SAN is a Dell MD3000i, two controllers, two NICs per controller: rc00 and rc01; rc10 ...
6
votes
1answer
1k views

Which events specifically cause Windows 2008 to mark a SAN volume offline?

I am searching for specific criteria/events that will cause Windows 2008 to mark a SAN volume as offline in disk management, even though it is connected to that SAN volume via FC or iSCSI. Microsoft ...
2
votes
2answers
312 views

Windows 2008: re-use of deleted blocks on virtual “thin” disks

We use a StarWind SAN which has the concept of thin-provisioned disks that grow as needed. You can allocate a 4TB drive but it starts off tiny and grows as blocks are written to the virtual disk (via ...
1
vote
1answer
305 views

virtual san appliance in esxi? why?

I am looking at different SAN solutions (Starwind, Lefthand, OpenFiler, OpenSolaris, etc.) for my small office and I understand that there are many virtual SAN appliance (VSA) solutions which can be ...
0
votes
0answers
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 ...
0
votes
2answers
56 views

Linking sub-domains to specific SANs

To most server managers, this may seem a very simple, and very stupid question! I'm not a server expert, but have been asked the question - not knowing the answer, I thought I'd improve my own ...
2
votes
0answers
796 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 ...
3
votes
1answer
118 views

Is distributed storage on an internal network possible?

I've been thinking about all the workstations I have on my shop floor (about 50) and the wasted drive space each of them has. For instance, my machines only use about 30G to 40G of local storage, yet ...
6
votes
1answer
618 views

SAN booting Oracle VM from a UCS blade

We have an Oracle VM Cluster that we are provisioning on a Cisco UCS B series blade chassis. It has 2 fabric interconnects (FC0 and FC1) provisioned to the (3) Oracle VM service profiles and it is set ...
-2
votes
1answer
89 views

backing up vmware [closed]

I am not understanding the backing up of vm's to the cloud with out backing up the data there also, these vendors are proposing vmware in the cloud on the fly, does that make sense without the san ...
0
votes
1answer
67 views

webserver cluster serving web content using a SAN still results in a single point of failure

I'm looking for a better way of doing things than using a SAN lun mounted to multiple webservers as a way of keeping data in sync. The applications require instantaneous or near instantaneous ...
3
votes
2answers
482 views

RHEL iSCSI on FreeNAS

I am able to mount a iSCSI SAN drive onto multiple RHEL Servers, but when I make changes to the files on SAN, they are not evident on the other servers sharing the same drive. Am I missing something? ...
2
votes
1answer
120 views

Server 2008R2 cluster for hyper-v - start with a single server?

I'm planning a Hyper-V virtualization system what will include: 2 very nice dual 16 core servers Dell MD3600f fibre channel SAN It will be running about 10 virtual machines. The plan is to setup ...
3
votes
1answer
144 views

vSphere 5 and Powerpath/VE?

I am in the process of setting up our vSphere 5 environment. With previous version of vSphere I have used the native pathing with VMware but I now want to investigate Powerpath/VE since it now works ...
5
votes
6answers
730 views

SAN alternative for VMWare

Has anyone utilized something aside from a SAN to run their VMWare images off? We are looking to drop in two HP Servers and VMWare on them and run them off a SAN. Due to the cost of SAN though our CFO ...
5
votes
1answer
1k views

Esxi with iSCSI SAN slows down with many multiple VMs running

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 ...
13
votes
3answers
2k views

150 TB and growing, but how to grow?

My group currently has two largish storage servers, both NAS running debian linux. The first is an all-in-one 24-disk (SATA) server that is several years old. We have two hardware RAIDS set up on it ...
2
votes
2answers
2k views

HP StorageWorks P4500 G2 Manager Management

According to the documentation, a management group should have an odd number of managers greater than 1. I have a four node SAN consisting of P4500 G2s. I plan on having two clusters with two nodes ...
-1
votes
1answer
133 views

Replicate / SYNC / Copy thousands of files

Windows 32BIT Box (Server OS) 4GB RAM a 800GB LUN Mapped to the above box as a local drive Around 700GB of text files (Yes text files and a few thousand word documents) nested in thousands of ...
8
votes
2answers
242 views

Can i pause VM's while power-cycling iscsi storage array

Unfortunately I may have to power-cycle my storage array. In the context of using KVM with libvirt managing the Virtual Machines where i need to power-cycle the storage array, is it possible or even ...
0
votes
1answer
130 views

Is DELL R510 a right setup for a backup server [closed]

I am a programmer and doesn't have a knowledge on SAN. My boss asked me to get a quotation of SAN from a vendor. The vendor suggest the following setup for our SAN: File Server:DELL ...
0
votes
1answer
652 views

Exchange 2010 SP1 and RDG (Remote Desktop Gateway role) and VPN (Remote Access Server role) all on one box, in DMZ?

We're finding that RDG (Remote Desktop Gateway role) and VPN (Remote Access Server role) and Exchange roles do not want to play nice on one Server 2008 R2 machine. For this reason we've moved to ...
3
votes
2answers
4k views

Hard and soft zoning vs. port and WWN zoning

I've been working with the storage guy in our business and I'm trying to get up to speed on zoning, but I'm finding conflicting information. I'm confused about the relationship between hard and soft ...
3
votes
2answers
368 views

LUN and VMFS 5 sizing assistance

I am working on setting up our vSphere 5 environment. With vSphere 5 you can go > the 2TB VMFS datastore size that you were capped at with in 4.x, etc. What size datastores are people using and ...
0
votes
1answer
498 views

Linux Multipath - Can a Host connect to two different SANs?

I may need to power-cycle a SAN and i'm looking to avoid downtime. I have some options to essentially copy live LUNs from one SAN to another. Currently i have a single iSCSI SAN and i connect to it ...
2
votes
1answer
325 views

LVM directly on whole SAN volume vs. LVM on single, whole SAN volume spanning partition

I am wondering what the advantages and disadvantages of the following two scenarios are. LVM physical volume directly on SAN volume pvcreate /dev/sda LVM physical volume on a single partition, which ...
0
votes
3answers
799 views

P4300 G2 SAN FAN Header Connections

I've recently had to replace the System Board on my P4300 G2 SAN due to a failure to find a boot drive. Unfortunately after replacing this it won't boot past the POST screen, it identifies that there ...
14
votes
5answers
950 views

Choosing a SAN technology for 100s of VM Web Servers

The Problem We have an issue with performance on an existing platform, so I'm turning to the hive mind for a second opinion on this. The performance issue so far relates to IOPS rather than ...
3
votes
5answers
2k views

Would using SAS disks instead of SATA disks make sense over NFS for a VMWare datastore?

We are deciding whether to use SATA or SAS aggregates on our Filer for our VMWare datastore. We will be using NFS to connect the VMWare hosts to storage. Doesn't seem to make sense to use SAS disks ...
2
votes
2answers
641 views

Can you detect partition misalignment from a VM?

First of all the back story - All of a sudden (literally overnight) an instance starts throwing CPU utilization alerts. This is a rather lowly VM (1 vCPU, 2GB RAM) but all it does is very low NFS ...
4
votes
3answers
2k views

Should the SAN (Dell MD3200) management port be on the same subnet/VLAN as the failover cluster private subnet/VLAN?

So, I'm getting a bit confused here. I have a Dell MD3200 SAN with dual controllers. Each controller has an Ethernet management port that connects to a switch. Together the two controllers connect to ...
3
votes
2answers
698 views

linux multipath - change device alias safely

I'm running RHEL 5.2 connected to a NetApp over FC. The server is running a database on mpathNN devices that can not be stopped. I need to add a new LUN and give it a specific alias (rather than ...
0
votes
2answers
465 views

SQLIO and SAN performance problems

I've had a feeling our SAN is performing badly, so I ran SQLIO with the help from Mr Ozar's blog post. My first problem is that I couldn't create a 20GB test file. This is the result using 64KB ...
5
votes
4answers
3k views

SAN or NAS 100-200TB - where to start looking? [closed]

I'm starting a project to consolidate a bunch of data and make it available on our LAN. I'm thinking that we may have a need for anywhere from 100-200TB at any one time. What factors should I be ...