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

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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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28 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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19 views

What is the best way to setup our storage architecture? Need help thinking it [duplicate]

We are an innovation company that is looking to create a fast, simple, and easy to use network. We are not IT people, and we don’t want to be. That’s why is so important to us that our network can be ...
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9 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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1answer
54 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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24 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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2answers
70 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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27 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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29 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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2answers
40 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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18 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
23 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
32 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
26 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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40 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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1answer
32 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 ...
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49 views

Optimum LUN size for LVM created NFS share

I have access to roughly 80 TB of capacity via a SAN, which I want to set up as as 2 NFS shares: 1 share of 70 TB and 1 share of 10 TB. The 10 TB share will have full backup to tape, whereas the 70 TB ...
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1answer
55 views

SAN performance too low?

I've noticed my new EMC VNX5200 SAN tends to perform better after "burning in" a partition. By this I mean filling the partition with different junk data and deleting everything a few times. Asked my ...
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1answer
61 views

Email storage server - NAS or SAN? [closed]

I'm looking for storage server that could store ~34TB (34 SSD disks of 1TB) of emails. I'm thinking about two NAS QNAP storage servers, but I'm not sure if it's OK to use NAS instead of SAN. Any help? ...
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3answers
112 views

Need the “msacli.exe” file for monitoring P2000 SAN. IOPS values needed

Hi i need some performance stats from our MSA p2000 SAN. The Problem is that i want to have the values i get when i connect via SSH and use the command "show vdisk-statistics". This command shows me ...
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32 views

Proper Partition Alignment

I'm trying to follow the advice from this TechNet article about partition alignment. Our San is an EMC, the disks are in a 4 disk raid 10. This services an I/O intensive application, 60:40 write:read. ...
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1answer
28 views

Storage volume is not avaliable from second node AIX 6.1 OS

My environment comprised AIX 6.1 OS installed over six physical servers and connected via brocade switch to DS8000 SAN storage. I am aiming to build HACMP cluster on two physical machines in a way ...
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1answer
46 views

Which VLAN should a secondary server NIC go on?

We have just upgraded our SAN backend with 10 Gbps connectivity and we have a few Windows servers that currently use a 1 Gbps connection, which we would like to upgrade by adding 10 Gbps NICs to. Part ...
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90 views

Windows Server 2012R2 Backup

We have deployed Windows Server 2012R2, which by using the Windows Server Backup was backup on the drives connected from SAN. SAN disks connected through multiple paths using Windows Multipath-IO. ...
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2answers
144 views

Quick format of LUN in Server 2012(R2) hosted on a Thin provisioned SAN vol takes ages

I've now experienced this issue with 3 different storage vendors, using 3 different CNA adapters (all FCoE though), so I'm fairly sure this issue is not isolated to a specific storage vendor (seen on ...
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19 views

brocade 6520 san switch is not supporting in hp storage essential

I was trying "discover" Brocade 6520 SAN SWITCH in HP Storage essential, is not supported but the same configuration same speed switch "brocade 6510" is able to discover. how to make brocade 6520 ...
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1answer
47 views

Why shared-disk architecture is beneficial for Oracle RAC? [closed]

Oracle RAC is using shared-disk architecture. I cant see why this can make the whole product highly scalable or available ? the shared storage can itself turn into a single point of failure. and if we ...
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1answer
151 views

Merge Live VMware hosts into existing vcenter

We currently have 3 VMware hosts, all running ESXi 4.1. They are all HP DL380 G7's, two of them having dual Xeon E5620 cpus with 96GB RAM, and the third having dual Xeon E5645 cpus and 64GB RAN. The ...
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2answers
104 views

Multiple iSCSI LUNs to one Server

I'm reasonably sure i'm ok to do this, but I would love some confirmation. Simple question, can I have two LUNs from the same SAN attached to the same server? More detail: I have a HP MSA2000 SAN, ...
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42 views

VDI LUN and RAID Group design optimization

I have a shared storage SAN for our VDI environment that was configured in a specific way by a third party and I was wondering what (if any) was the benefit of the design. The SAN is divided into ...
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1answer
69 views

Moving large size directory using rsync

I plan to move from linux o/s a directory which is mounted on SAN(offboard) to external storage for backup. The dir size is 14TB. I do have experience moving files in/out using rsync but never done ...
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1answer
73 views

6 GB/s SAS RAID 10 (6 Drive) vs. 3 GB/s SAS RAID 10 (14 Drive)

I am running MS SQL 2014 Standard and have a Dell MD 3000i iSCSI SAN. Rough specs: Dell R610 With PERC H700 controlling 6 x 2.5" 15K SAS drives (6 GB/s) Dell MD3000i with 14 x 3.5" 15K SAS drives ...
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1answer
424 views

“Mandatory” free space on a SAN?

I'm not an expert of SANs, I'm writing here to get some clues on continuous and exasperating problems we're having which our supplier seems not to be able to solve. we own an ENHANCE ES3160P4 SAN ...
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1answer
52 views

One SAN connecting to Hyper-V and VMware [closed]

my customer currently has two hypervisor types in place - using VMware for Linux systems and Hyper-V for Windows. They currently have different storage infra for each of these platforms which cost ...
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2answers
411 views

IBM DS3400 - how replace a good disk

I've to replace all my disks with other bigger ones. I read in the manual: Never hot-swap a drive when its associated green activity LED is flashing. Hot-swap a drive only when its associated amber ...
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1answer
40 views

Undo adding disks to a RAID-Z Configuration

I've started running out of space on one of my data pool and decided to expand it by adding some extra disks. Below is what it looked like before extending: NAME STATE ...
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1answer
455 views

iSCSI enterprise target and client both on debian give invalid iniatorname error

I have two Debian Wheezy machines and am trying to set up storage for one of them on the other's disk using iSCSI (they do not have synchronized users, so NFS won't work for this application). I have ...
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1answer
170 views

Un-cluster storage added to Windows Failover Cluster Manager

Forgive me if I'm mixing up terminology, I'm a DBA and trying to see if I can un-do my error here. Background: I was adding a 3rd DR site node to a Windows Server Failover Cluster to utilize AlwaysOn ...
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91 views

Warning and alarm flags on brocade SAN switches — sfpshow

Can anyone explain what the error codes mean on sfpshow command output please. I didn't find any documentation on those. We have ports with these outputs: Alarm flags[0,1] = 0x5, 0x40 Warn ...
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2answers
185 views

Differences between HP and EMC SAN

I've managed Dell's EMC and Equallogic SANs in the past. I was recently put in charge of a Hewlett-Packard P2000 SAN. HP and EMC use slightly different terminology. I'd like to confirm I understand ...
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4answers
154 views

What trouble will I have when running a SAN past its support lifetime?

We are replacing a Clariion CX320 SAN because it is old (7.5 years). It has been otherwise very reliable. Yes, we have replaced a lot of disks, battery modules, and maybe even one of the ...
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65 views

Does a dead LUN path cause an increase in I/O times on the remaining LUN path(s)?

We use an EMC SAN appliance. There are 2 'paths' from the cluster to the SAN. Today we experienced that one of the LUN paths was 'dead' (as reported in the windows event logs). Presumably the ...
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2answers
497 views

How are Dell Equallogic Snapshots different from a Clone as it relates to disk space consumption?

I have a volume that is 125GB in space. Each snapshot I have is 125GB, exactly. I thought snapshots only grabbed data that changed, using its pointers. If not what the difference between a snapshot ...
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4answers
913 views

SAN with a few SSD drives, or lots of old fashioned HDDs?

My company is trying to figure out what type of SAN to purchase. This is specifically for database servers that are becoming IO constrained (storage is DAS right now, but we're hitting the limit of a ...
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1answer
40 views

MySQL - data inside vm on shared storage? [closed]

I'm planning on moving all my VMs to shared storage, and I have a question about how to deal with a MySQL VM: Currently the size of the VM image is 100GB, where most of the space is taken up by the ...
3
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1answer
654 views

VSphere web-client shows incorrect datastore capacity

On the vsphere web client I have a strange problem with one of my datastores as it's displayed capacity is incorrect. Originaly it had 1TB of disk space. After I increased it's capacity on 1.4TB the ...
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2answers
119 views

FC-Multipath: Which path_selector performs best?

So I learned that since Red Hat 6 it is possible to choose between 3 algorithms for loadbalancing between different paths to my FC-SAN, the default dumb round-robin - and new - queue-length and ...
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2answers
875 views

Adding additional disks to HP P2000 SAS Storage

We have a 12 bay HP P2000 SAS Enclosure with 6 drives on RAID 5 installed. The drives are configured as 2 separate DataStores for a VMWare vSphere ESXi setup. Now we want to add: 6 additional ...
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1answer
56 views

Easy way to share a drive with password protected directories?

We have 50 computers that students share. Is there an easy way to have student folders on a single drive on the network where each student has a password? Students need to be able to go to any ...
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4answers
205 views

SSD as cheap alternative to SAN storage? [closed]

We are a $3B company with a team of 6 infrastructure experts. I am a DBA, not part of infra team. Our setup is all VMware ESX 5.1, EMC SAN for storage and ExaGrid for backups. Prod and non-prod ...