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

learn more… | top users | synonyms (1)

2
votes
1answer
30 views

Beowulf cluster storage setup [on hold]

I'm a Computer Engineering student working on a project with a Verari blade cluster, a bit outdated for today standards. I had acquired some Unix experience but I'm not an expert at all. This Verari ...
5
votes
9answers
4k views

Tools for Troubleshooting SAN Performance Bottlenecks

What are the best tools for troubleshooting SAN performance bottlenecks?
3
votes
2answers
3k 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 ...
2
votes
3answers
465 views

SAN policies: general rules of thumb?

I'm being tasked with defining SAN policies for an external organization. I'm not a sysadmin, these aren't systems we have any authority over. I'm also no SAN expert. Whoever said work had to make ...
5
votes
3answers
178 views

Brocade mirror ports

I'm getting a bunch of brand new condor 3 based switches and these things have a feature I'd like to use called port mirroring. Essentially, a mirror port can be configured to show all traffic being ...
2
votes
6answers
171 views

SAN zoning advantages and disadvantages

We just got a SAN, and I will be assisting in installing it and configuring it, I asked someone to explain to me what we will gain using SAN zoning, but he was unable to answer my question, could some ...
0
votes
2answers
186 views

SAN to server mapping

we use netapp san for most of out storage. There are some host out there who use local disk as well.What is most efficient way to find out which server is using SAN. Does SAN management tool offer any ...
2
votes
4answers
347 views

On Server Disk Storage VS SAN Storage

I am looking at buying three servers, and trying to figure out which storage solution makes the most sense in terms of performance and cost. Total budget is around: $10,000. OPTION 1: Dell servers ...
1
vote
2answers
177 views

Hardware to link server to SAN

This is a real beginners question, but what physical hardware do you need to link a server to a SAN? An expansion card? Just a network port? Thanks
7
votes
7answers
997 views

What is a storage area network (SAN)? and What are some of the ways that it can be used? [on hold]

I need some good examples and links to companies that you are already using for buying SAN hardware, SAN data centers, etc.,
2
votes
1answer
649 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. ...
4
votes
1answer
72 views

Can someone explain the important differences between fabric, point to point, and loop on a fibre san?

I have a fully redundant HP 8/20q FC SAN that has been working well, but as I dig deeper into things looking for more performance, I'm quickly at the end of my knowledge when it comes to FC ...
0
votes
3answers
55 views

Linux: Get information/stats about storage network

I want to know as much info as possible about the SAN a linux server is connected to. What commands will give me the most comprehensive view? Simply knowing the WWN of LUNS doesn't do much for me. ...
2
votes
0answers
38 views

How is that possible that file was changed without date modification? [closed]

I'm using Blade Server with CentOS 6.5 (ext4) installed, disks combined in raid6, connected in a storage area network. Somehow some of my files become corrupted from time to time without updating the ...
5
votes
6answers
2k views

Offsite backup of Terabytes of data

I'm looking for a way to create an offsite backup of around 8TB of data. I've currently broken the data down into 2-4TB file systems and I'm using ShadowProtect to backup the data from an SBS 2003 ...
3
votes
0answers
27 views

Linux to linux USB storage? [migrated]

I was going to put together a small AoE setup for a small cluster, however 10Gb NICs are still rather expensive. Using superfast USB seems to provide the bandwidth I'm looking for at a much lower ...
0
votes
1answer
23 views

Re-purpose DD660 (DataDomain) for VM Storage

We have an un-used DD660 (DataDomain) and an un-used x3650 M2 that we are wanting to use as a test bed for playing with Hyper-V as we look into it vs. VMware. Has anyone used a DD660 is simply ...
0
votes
2answers
54 views

associating HP MSA2000 G3 to a virtual machine on windows server 2012 DC

Basically i wanted to have a Debian Squeeze associated to the SAN HP MSA200 G3 but due to lack of support i have now planned to deploy Windows Server 2012 Data-center on 2xHP Proliant DL380p G7 ...
2
votes
4answers
69 views

Is there a way to read SMART attributes for drives in a SAN?

We are running an SSD array in a SAN, and the performance is great. But we need to monitor the write endurance SMART attributes so that we can determine when the drives are close to wearing out. We ...
0
votes
2answers
1k views

What does this mean: “SATP VMW_SATP_LOCAL does not support device configuration”?

Can anyone tell me what this means in ESXi 5.1?: SATP VMW_SATP_LOCAL does not support device configuration I've googled it and I get a lot of results, but as yet all the pages that contain the ...
1
vote
0answers
26 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 ...
0
votes
1answer
23 views

Add node to HP StoreVirtual Management Group

I believe that what I am trying to do is simple: How to add a node to an HP StoreVirtual Management group (and cluster)? Basically we got newer VM hosts, and we want to move the nodes to those ...
1
vote
1answer
45 views

how to determine the iscsi target's naa in linux

I understand that iSCSI uses iqn / eui to identify target LUN. Once I have discovered the iSCSI target and logged in is there a way to determine the LUN's NAA id for the remote target from a linux ...
0
votes
0answers
19 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 ...
2
votes
2answers
100 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 ...
8
votes
3answers
6k views

Setup of HP ProCurve 2810-24G for iSCSI?

I have a pair of ProCurve 2810-24G that I will use with a Dell Equallogic SAN and Vmware ESXi. Since ESXi does MPIO, I am a little uncertain on the configuration for links between the switches. Is a ...
1
vote
0answers
31 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 ...
0
votes
1answer
754 views

Howo to get Multipath IO with Dell MD3600i into active/active setup?

I'm desperately trying to improve performance of my SAN connection. Here's what i have: [root@xnode1 dell]# multipath -ll mpath1 (36d4ae520009bd7cc0000030e4fe8230b) dm-2 DELL,MD36xxi ...
4
votes
3answers
122 views

Should I worry about Split I/O in a SAN?

We have a NetApp Storage system presenting LUNs to a few Hyper-V clusters. When running a system performance trace (in perfmon) on a 2008 R2 there's a warning about a "high level of Split I/O". ...
0
votes
0answers
10 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 ...
4
votes
3answers
3k views

When using thin-provisioning with ZFS, how do you make sure you don't run out of physical disk space?

Forgive me if this seems like a fundamental question, but I couldn't really find anything concrete on Google, and I'm not a system administrator by trade. We are setting up a SAN at our office using ...
2
votes
1answer
53 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 ...
2
votes
1answer
32 views

Windows 2012 BCD process to boot from replicated LUN for Boot from SAN

For our infrastructure we have a production site and a disaster site with SAN-based replication for the LUNs on the Windows servers. So for our proof of concept we have one server on the production ...
6
votes
1answer
69 views

IQN Naming convention

I've seen a lot of information about how IQN's should be formatted, but there's not a lot of information on how to build them. I'm kind of a newb when it comes to iSCSI, and i have it working, but I'm ...
0
votes
0answers
82 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 ...
2
votes
2answers
127 views

How to check the current queue depth value?

I have an OEL server connected via fibre to a NetApp SAN. How can I view the queue depth as the OS sees it? Output from lspci: 05:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel ...
3
votes
1answer
2k views

How Do I Create Multiple Physical Partitions/Volumes in openfiler on a Single HDD

I'm attempting to build my first iSCSI storage area network, using openfiler version 2.99 as an iSCSI target. I want to present storage to both vSphere 5 and Windows Server 2008R2 Hyper-V as ...
0
votes
0answers
59 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. ...
2
votes
1answer
26 views

Scalability in a High Availability Environment - SQL Failover Cluster 2012

I have created an environment where 1 SAN is connected with 2 Nodes (part of SQL Server 2012 Failover Cluster) of SQL Server. Windows Server 2008 R2 is used, and single DB is stored in SAN. We have ...
0
votes
2answers
76 views

qle2462 target mode on redhat 6

i have a solaris server with 40tb of data on it that i need to get moved to another linux server. i bought 2 qlogic fiber cards both are qle2462 and put one in the solaris box and the other in the ...
0
votes
2answers
57 views

Sharing a SAN LUN across 2 clients

I have an ISCSI SAN that we purchased to store images for our cluster (2TB of images). After reading, we probably should have gone with a NAS rather than a SAN, but back to the point. I'm going to ...
1
vote
1answer
61 views

Best method to share ISCSI lun across cluster of app servers

I'm in the process of migrating our cluster to new hardware. We use bare metal servers, no virtualization. Currently, we have around 30 "application" servers. When we make an update, we push the ...
1
vote
1answer
25 views

Veritas and VNX LUN Expansion

I have an EMC VNX Storage array and a front end Linux server running Veritas. A 4TB lun has been assigned from a diskpool on the VNX and presented to the server where Veritas has split it out into ...
1
vote
2answers
3k views

How to check fiber connectivity in ESXi 5.0?

On a VMware ESXi 5.0 host, how can I check if fiber storage adapters are properly connected to the fiber switch/SAN, i.e. if the fiber link is up?
1
vote
1answer
77 views

Building a SAN on 2012R2 “Storage Spaces” - More Cores, or Faster Single Thread?

I am considering building a SAN unit on Server 2012R2 using Storage Space. In that situation is it more helpful to have more CPU cores, or less faster cores?
2
votes
1answer
100 views

XenServer Linux guest booting off iSCSI SAN (ZFS storage): Will a non-checksumming guest file system still be at risk?

We are storing files on FreeNAS 9.2 using ZFS. I love the data integrity claims made by ZFS, having randomly lost data in the past on servers using ext3, XFS, and ReiserFS that were not mistreated ...
0
votes
0answers
37 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 ...
4
votes
1answer
104 views

ESXi 5x: Changing number of IOPS per path sees dramatic improvements

I'm a bit embarrassed that I've never seen or used the -iops parameter as part of the esxcli deviceconfig options. I stumbled upon an article and proceeded to benchmark before and after using various ...
11
votes
4answers
511 views

Disk Speed Performance in a SAN

We are currently looking into buying a SAN, and have some concerns over the speed of disks we are going to put into the array. We would normally have gone for 15k disks over 10k every time, but one of ...
3
votes
2answers
4k views

How does a SAN architecture work and more importantly scale?

I'm trying to understand some SAN infrastructure and I was hoping some of you with more experience than me could help me understand scaling with a SAN. Imagine that you have some computer servers ...