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

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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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0answers
4 views

Setting up a highly available Mail service with Postfix and ISCSI [migrated]

in an academic project these days we've got to set up a highly available Mail service with ISCSI and Postfix... For now i have a highly available ISCSI SAN and also a highly available Postfix server, ...
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33 views

infiniband SAN storage for DELL m1000e [duplicate]

im building a 3D render farm over Dell m1000e blade system, i found good one with infiniband switches and mezzanine cards installed, i know that the infiniband is very fast in sever interconnect. my ...
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4answers
131 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
26 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
31 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
76 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
20 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
103 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 ...
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1answer
56 views

What type of cable/connectivity to use between EMC VNX 5200 and Server directly - without going through a SAN switch?

It would be much appreciated if anyone would share insights regarding the below issue: What type of cable/connectivity to use between EMC VNX 5200 and Server directly - without going through a SAN ...
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0answers
102 views

VMware ESXi extremely slow Virtual disk performance compared to RDM

I have a ESXi 5.5 server running with a FC SAN. The FC san is created using an openfiler OS with software RAID and exported with the qlatgt driver. Direct writes to this SAN when no VMFS is used work ...
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1answer
81 views

Can't Repair SR in XenCenter

I've added in a 4th host to my Xen 6.2 cluster and I'm unable to get it to successfully attach to my existing storage repositories. I'm using 3 older IBM hosts and the 4th new one which is CPU masked ...
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1answer
37 views

Possible to cascade HP StorageWorks P4300 G2?

From my understanding HP StorageWorks P4300 G2 is intended to be multiplexed over 1Gb ethernet when used as a SAN, where half of them should be in a remote location. If all 4 are next to each other, ...
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1answer
21 views

Can I recover a corrupt MFT on windows 2003 server if I'm still able to access files through a network share

I have a 2TB SAN formatted with NTFS which was accidentally connected on two hosts simultaneously, and when I browse files from both nodes, I see some test data that I created when I originally setup ...
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0answers
35 views

NFS Datastore Disconnects When sVmotion Migration is Attempted

I have a EMC VNXe 3100 and I had tested both iSCSI and NFS connections from it to my hosts, with NFS appearing to be the better of the two. So I set it up and in my testing with 1 VM everything ...
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1answer
91 views

Software for a DIY fibre channel SAN? [closed]

I am trying to create a SAN on a budget. This will be used with a VMware ESX 4.1 cluster for our developers to use as a sandbox/test environment. Since this is not a production environment we do not ...
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1answer
14 views

Connection to MGMNT iterface on Cisco DSC 9124-K9 lost

From some reasons i've lost connection to mgmnt interface in DSC9124-K9 - I cannot ping, cannot see MAC in arp. Fabric interfaces are working well, without problems so I do not want to reset whole ...
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0answers
162 views

Virtualization-(Cluster) with KVM/libvirt on top of a FC SAN

I'd like to set up a 2-node HA-Cluster based on Ubuntu and KVM running about 30 VM's. Both nodes are connected to a HP MSA(5TB) via Fibre Channel. Multipathing's already working and the nodes are able ...
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3answers
70 views

ESX SAN overbooked, what happens if storage limit reached?

In ESX you can easily overbook the available storage with the Virtual Guests. What happens if a overbooked SAN reaches its capacity limit? Its not an actual problem i'm faced with, we just had the ...
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2answers
50 views

Windows 2008 R2 Boot-from-SAN Migration Methods?

We are running Windows Server 2008 R2 Enterprise on a Cisco UCS B200 M3 blade server that is diskless. Currently, we are going through a EMC SAN lifecycle/upgrade. I need to perform this migration ...
2
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1answer
121 views

Operational State Down on QLogic Switch

I have a QLogic SANbox 5800 Fibre Channel Switch with 20 SFP ports. Out of these 20, I can use only 16. The last 4 ports are showing Operational State Down. SANbox (admin) #> show port ...
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3answers
101 views

Shared Disk in modern data center (SAN, virtualization, etc)

I'm a developer...treading here on foreign terrain. Please pardon any naivete. I work on an application that stores data both in a database and the filesystem. Context: Clustering and Network ...
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3answers
904 views

Why should iscsi traffic be isolated?

Why should iscsi SAN traffic be isolated? I'm trying to explain to my network guy why we should isolate the traffic.
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2answers
48 views

parallel filesystem without SAN infrastructure

Is there any parallel filesystem that doesn't need SAN infrastructure ? What I want to do is to create a logical volume and attach it with multiple VMs that will use the disk concurrently.I don't want ...
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53 views

IBM DS 5300 password recovery

There is a IBM DS 5300 storage in our data center. Unfortunately I have forgot the password and I want to recover/reset it. I did a little search and found that I can connect a physical Console to ...
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1answer
354 views

No LUNs visible on ESXi 5.5 using Brocade 825 connected to EMC VNX 5300

We've just bought a new Dell PowerEdge R620 to replace the oldest of our 3 hosts in our vSphere cluster. The existing hosts are connected to our EMC VNX 5300 SAN using gigabit ethernet which is a ...
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1answer
23 views

Do browsers re-use ssl connections for different domain, but same ip:port and same SAN certificate?

I wonder if browsers can and do re-use the same connection when both domain names resolve to the same IP and both are covered by a single certificate (SAN) when used together on one web site. ...
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3answers
325 views

With 200TB of needed storage, is a SAN a good idea?

My employer has, what I consider to be, a lot of data. We currently have about 10TB of data on our NAS, which is about its capacity, and we would have more data on it if we didn't constantly move ...
2
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1answer
68 views

P4500 Lefthand SAN report degraded on one node when all disks are health “NORMAL”

I am experiencing a strange condition with our HP G1 lefthand SAN cluster. The cluster consists of 4 nodes across two sites, two nodes ( node 1 & 2 )in each site are RAID5 across the pair, and ...
0
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2answers
210 views

iSCSI SAN RAID 10 Performance — Poor Read, Good Write

I have a EqualLogic PS4000 SAN unit with the latest firmware, setup in RAID 10. I have 3 2TB Volumes on the SAN shared out via iSCSI on 2 eth ports on two different subnets. I have moved a test server ...
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1answer
54 views

HP arrray - XP and EVA - performance monitoring

I have some HP arrays I'd like to monitor for performance. I'm making a reasonable amount of progress with my 3PARs, in using ssh connectivity and show... commands to gather performance information ...
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32 views

SSL cert issued to and SAN attribute

I have added a cert to my application cacerts file. The new cert is issued to one DNS(abc.com) and they have added few other DNS(XYZ.com, TEST.com) to the SAN attribute while creating. I tried ...
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2answers
95 views

Dirty Cache Dell Equallogic Storage Array

has anyone ever run into a dirty cache issue with a Equallogic SAN. Even after replacement of the controller cards in the Equallogic Storage Array fails offline with a dirty cache. I have listed ...
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1answer
147 views

Limiting - IOPS in VMware causing servers to run VERY slow

I have servers running a few different iSCSI SAN units. I was trying to balance IO requests to the datastores, so I started changing the "Limit - IOPS" on my servers from unlimited to 100-400 ...
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2answers
63 views

Setting up a multi-host SAN

I'm looking for some advice on setting-up multi-host I/O access on our SAN: I have a blade enclosure (PowerEdge1000e) containing an Equallogic PS-M4110 storage blade with a single RAID6 volume ...
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1answer
82 views

Netapp raid scrubbing on a V-Series

My V-Series NAS is running ontap 7.3, and gets all its disk from a SAN. LUNs are provisioned to the Netapp, which puts them into a raid-0. The SAN itself, of course, uses RAID with scrubbing and ...
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1answer
103 views

RAID 10 Cluster Size for SQL Dynamics AX Database

Many article read and many websites visited yet still no closer to a firm or concrete answer. We have created all our Arrays for our SQL 2012 installation with the appropriate LUN's and understand ...
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47 views

xen 6.2: is there a maximum shared storage size?

Am attempting to grow the volume size on shared storage from 2Tb to 3Tb. Have resized the volume but am not seeing any change when I ssh to the pool master and attempt to detect the change(s). Am ...
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16 views

Xen: resizing underlying iSCSI SAN volume

I have a SAN volume that provides the storage for 3 machines running Xen 6.2. The volume is down to about 10% free but there is more available unallocated. The SAN (Equallogic) supports volume ...
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1answer
160 views

SAN Synchronous Replication and SQL Server - Is RPO of 0 possible?

I am working on a solution that is using SQL Server 2012 SP2, but without the use of AlwaysOn availability groups. This is due to cross-database transactions, that does not work for this scenario. ...
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1answer
970 views

How to give computer account access to EMC VNX CIFS share?

I have a web application that runs using the NETWORK SERVICE account and which has a Virtual Directory to a shared folder (containing images) on an EMC VNX NAS/SAN Unified Storage file server. I ...
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2answers
143 views

Array free space requirement

The general rule of thumb is don't use more than 80-85% of your capacity, otherwise performance degrades sharply, and other bad stuff may happen. On a 8TB array, this comes out to around 1.6TB of ...
2
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1answer
271 views

HP P2000 MSA G3 SAN-SNMP Trap Setup

I'm trying to setup an SNMP trap for an HP P2000 G3 MSA SAN to report on the overall disk performance parameters (mostly I/O rates). We have a server monitor suite running which can use SNMP traps to ...
0
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1answer
40 views

Why can't I use Services or alike as my subdomain name with SSL?

We have purchased 2 SSL UCC certificates from GoDaddy a few months ago for something like myandy.com and myandy.com.au, and I had defined the following Subject Alternative Names: gateway services ...
2
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1answer
177 views

How to Resolve Hyper-V Disk Location to Drive Letter

When viewing cluster disk properties in Failover Manager or the physical path to VHD's in the settings of a VM in Hyper-V Manager the location is displayed by GUID. Is there a quick way find out ...
5
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1answer
227 views

Send interactive zoning commands to Brocade switch

I have a Brocade FC switch that I'd like to do some zoning on. I have a build file with too many lines to copy-paste into a normal interactive session, and I have ssh set up with pre-shared keys ...
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1answer
177 views

IBM V7000 firmware upgrade effect on mounted LUN

We've IBM storwize V7000 Storage where the firmware is going to be upgraded to latest version.. This will require a reboot to the storage. I've got arround 10 LUN's (almost 10TB) coming from this ...
0
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1answer
409 views

Dell PowerEdge R710 direct-attached to HP MSA 2040 SAN [closed]

I have no idea about Direct attached storage; I do not know that it is possible to do. I plan to use HP MSA 2040 storage to direct attached with my dell Power Edge R710 via Fiber Channel. What do i ...
2
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0answers
79 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 ...
3
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2answers
951 views

ESXi boot time with 9 iSCSI targets

Our ESXi hosts have always been slow booting when it came to iscsi_vmk loaded successfully - sitting here for almost 5 minutes. In all a full server reboot takes almost 12 minutes. We have 9 iSCSI ...