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

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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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3answers
274 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 ...
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55 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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2answers
88 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 ...
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3answers
289 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". ...
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31 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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1answer
108 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 ...
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1answer
68 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 ...
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128 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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2answers
2k 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 ...
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498 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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1answer
46 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 ...
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1answer
207 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 ...
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2answers
101 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 ...
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1answer
61 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 ...
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1answer
161 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 ...
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1answer
112 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?
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1answer
219 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 ...
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2answers
205 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 ...
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0answers
80 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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1answer
273 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 ...
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4answers
971 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 ...
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142 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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2answers
162 views

Mount NTFS volume on two different servers

We mounted an NTFS volume on two Windows 2008R2 servers. This volume is on a MD Dell storage array, connected to servers with Fiber Chanel. It worked a while, but now we get some errors like ...
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1answer
460 views

Is it possible to measure HBA throughput using Perfmon on Windows Server 2008 R2?

I have a server with two round-robin 4GB HBAs to a fiber switch and was wondering if I can measure activity/throughput on these HBAs using Perfmon? If so, which counters would I use? I initially ...
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61 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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1answer
1k views

XenServer 6.1 Reports Wrong Storage Amount in XenCenter

We're using XenServer 6.1 Advanced on three blades in a pool. I'm in the process of moving storage from an old SAN to a new SAN using Storage XenMotion. So far, so good! I discovered though, on a LUN ...
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82 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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321 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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1answer
275 views

replacing failed hard disk in raid 1 on dell emc cx300 [closed]

how can I replace failed disk in slot 12 in raid 1 on san dell emc cx300 I HAD Configured the san with hot spare hard disk in slot 13. Is it enough to remove it from it's slot an put instead of it ...
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4answers
347 views

10GbE with FCoE with SAN and LAN traffic is a good solution?

I'm building a small datacenter from the ground, and I'm considering 10GbE. I'm looking for some advices about this decision. I've compared Infiniband, FC, 10GbE and LACP with GigE, and in the end ...
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1answer
35 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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34 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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1answer
282 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
219 views

Clariion CX300: Removing system disks from a RAID group?

I have a raid group that includes every disk my DPE2. I want to remove the system disks (0-4) from this RAID group. From what I read I should i put them in their own RAID group and avoid storing ...
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1answer
51 views

Can't view properties of an hba in vSphere 5.5

Why can't I view the properites of this HBA in vSphere?
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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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2answers
287 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 ...
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2answers
264 views

SAN newbie: What kind of fiber cables do I need to connect to the front end ports on my EMC CX300

I have an old CX300 I'm messing with and I cant determine what kind of HBA\fiber cables I need to connect a server to the front end ports on the DPE2. The hardware reference doesn't give me any ...
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4answers
105 views

SAN newbie: Using a server like an ISCSI gateway for a purely FC SAN device

I am very new to SANs and have inherited an old EMC CX300 to play with. The CX300 is purely FC, but I'd like to experiment with ISCSI as well without having to purchase an expensive ISCSI gateway ...
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1answer
147 views

How to make clustered storage available from SAN to Hyper-V for two node cluster

I want to make a 2 node SQL Server 2012 cluster. Both nodes are virtual machines running Windows Server 2012 on Hyper-V. I have a physical SAN available which I can use for clustered storage so I was ...
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2answers
1k views

XenServer Shared Local Stage

I am new user of XenServer 6.2. I have multiple servers connected to Pool/Cluster. Each server has 4 HDD with sw raid10. I would like to make local storage shared because of need quick migration. ...
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1answer
339 views

PS6000 showing packet errors but no errors appear on the switch

We have a loaned PS6000E SAN that we are using to relocate our iSCSI LUNs off our current PS4000E SAN to upgrade it from Seagate Moose drives under a proactive replacement plan by Dell. We've ...
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1answer
53 views

What tool/application (free or not) should I use to generate and write lots (TBs) of data, fast [closed]

I am testing a storage appliance and need to write TeraBytes of data to it. Using fio or dd takes days to write that much amount of data. Are there any (free or not-free) tools/applications, that I ...
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2answers
1k views

HP MSA2000, how detect faulty disks?

I have an HP MSA2012fc, it happened a few times that my large vdisk (6x 1TB raid 5) get offline, seems some disks are faulty, the event log only shows 2 of the drives had "bad blocks" and some disk ...
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0answers
459 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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23 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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2answers
186 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 ...
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51 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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1answer
159 views

Expand PV on FC SAN - Linux doesn't see new size without reboot

Got Infortrend SAN attached through fiber channel to Ubuntu 10.04 Server. The HBA is Qlogic QLE2562. After expanding the LUN on the SAN, the server still shows the old size. If I reboot the server, ...