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

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FibreChannel-SAN SCSI-block-devices get lost

There are 3 LUNs on a FC-SAN I want to access using 2 HBAs (with two paths each. When the system is booted, everything seems fine, but after a while the sd*-devices from the second HBA disappeared ...
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12 views

vSphere cannot see HP iSCSI LUNs

When attempting to add storage under vSphere 6.0 (Add Storage > Disk/LUN), required HP volumes are not available to add. Can someone please offer some advice? The HP SAN is visible within the iSCSI ...
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2answers
58 views

Is there any way to fake SAN in VMs

I need to set up an SQL Server cluster for very low transaction volume functional testing. That requires a Windows Failover cluster and according to TechNet and Michael Otey that requires a SAN. ...
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3answers
50 views

ESXi FibreChannel Woes

I just recently got VMWare ESXi installed on one of our servers. I installed some fibre channel cards (QLogic) and for some unknown reason they show up in the storage adapters tab as an ISCSi ...
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1answer
76 views

ESXI 6.0 u2 multipathing configuration with group by prio

Is it possible to change the path grouping policy of ESXI 6.0 multipathing to group_by_priority? In essence I want to work with the grouping priorities given by a SAN storage. I didnt see any specific ...
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2answers
39 views

SAN - NFS and CIFS

I am an application developer and very new to storage and SAN technologies, So this is a very basic question. Recently I had a requirement to have common storage share mounted on both Linux and ...
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1answer
52 views

Passing SAN Storage to Virtual Machine in active/passive HA Cluster

I need to attach a fibre channel SAN disk to one virtual machine that resides on an active/passive cluster (pacemaker, corosync). As it is the backup storage, corruption has to be strongly avoided. ...
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8 views

Is it possible to get performance metrics out of hitachi san array or out of tuning manager?

Has several hitachi san arrays ( AMS, HUS ) and virtualizers ( VSP, USPV ). Hitachi Command Suite had installed. Tuning Manager quite usefull, but i want to get statistics out of it ( automatic way, ...
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1answer
65 views

Fibre channel: LTO tape overwritten on bus reset

There is a situation that we had at out customer that I'd like to understand better. Here's what happened: A library with LTO tape drives is connected to a fibre channel environment Archiving ...
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0answers
13 views

No w/s in iostat output even though wMB/s is high

I am trying to format a 2 TB SAN based block device (/dev/mapper/mpathb). Even though, mke2fs has been running since over one hour without completing, iostat -z -x -m 10 output in a separate terminal ...
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1answer
22 views

How to calculate storage working set for sizing SSD/Flash size for tiered storage?

How would you calculate the size of the working set of storage that would live in a SSD/Flash tier of a tiered/hybrid storage solution? This would be used to gauge the size of the SSD/Flash tier. By ...
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1answer
34 views

Windows Server 2012 R2 Hyper-V - High Availability (Clustering): Connect servers to storage using FC: switch or direct attach?

My scenario: I have a DS3400 DISK SYSTEM DUAL CONTROLLER FIBRE CHANNEL storage equipped with two controllers each equipped with two 4-GBPS FC ports, for a total of four FC ports. Then I have four ...
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2answers
41 views

Is it possible to have a directly attached SHARED Storage (accessed at block level) other than SAN or NAS?

We need storage specifically for HPC Lustre failover setup, where it is must that two servers should share same block level storage to have failover configuration. With very limited knowledge on ...
9
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2answers
366 views

Can you connect a SAN directly to a HBA with Fibre Channel?

I am in the process of sourcing our company's first SAN as we have the need for high availability/shared storage. I have noticed fibre channel switches are extremely expensive, and for redundancy we ...
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1answer
26 views

RAID 10 (2+2) and (4+4) - terminology or physical setup?

I understand what RAID10 (2+2) is (stripped mirror) whereby there are data are striped across 2 groups and each group have a pair of mirror devices (2 disks). This is how i have understand "2+2" For ...
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0answers
33 views

Loading initial ramdisk very slow

I have a SUSE Linux 12 system here where the boot step "Loading initial ramdisk ..." sporadically takes hours instead of seconds. This system is supposed to boot from SAN and multipath is in place. ...
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0answers
58 views

Dell Data Collector Manager not showing Storage Center

In one of our environments, Dell Enterprise Manager Data Collector doesn't seem to connect to my Storage Centre. The logs shows that "Storage Centre Controller Cannot connect to the configured ...
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0answers
28 views

Finding or estimating sequential vs random distribution of existing system (VMware / SAN)

IOMeter testing says the IOPs of the storage subsystem can range from hundreds of IOPs for 100% random loads to tens of thousands IOPs for 100% sequential loads. Is there any way I can measure or ...
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1answer
27 views

Mounting disks of remote ESXi pair as a LUN in local ESXi server

Imagine a pair of servers with fiber channel adapters. Normally each one can connect to the shared SAN storage using its HBA and fiber cords, Now, eliminating the SAN, is it possible to interconnect ...
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1answer
90 views

Trouble bringing a cloned cluster shared volume disk online

I have a Hyper-V cluster (2008 R2) with a CSV that I want to clone. The CSV is on a fibre channel SAN (HP MSA M3 P2000 G3). I cloned a volume from the SAN side of things, and have mapped it to my ...
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1answer
62 views

Mounting 40 iSCSI HP 3PAR SAN volumes in single CentOS7 server

I need to mount 40 HP 3PAR SAN volumes iSCSI LUN/target in single CentOS7 server that run nginx, each volume size is 8 TB, and that 40 mount points need to appear as single share path. Does such ...
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1answer
95 views

HP P4500 G2 system board replacement

Initially, I had such a problem: HP P4500 G2 does not turn on. So we buy new system board (spare 583736-001) and when i replace it storage start to power on, but with error code 1611 - Fan Solution ...
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1answer
11 views

create SMB share on a clustered vm or dedicated server

I have a cluster that consists of 2 IBM servers, 8Gbps Fibre channel based SAN and 1 storage server (IBM Storwize v7000), i run virtualization on that cluster (Win2012 Hyper-V) but also want to use ...
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3answers
104 views

How can I determine the performance penalty of VT-d vs. baremetal?

I am looking to configure my server in a slight odd way to create a private cloud setup. I have to take the HBA that my storage disks are tied to and pass it into a VM (probably xen) to allow the ...
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96 views

How can I distinguish between SAN zoning and LUN assignment issues on RHEL6?

From Red Hat Enterprise Linux 6 how can I tell the difference between a SAN zoning problem (e.g. cannot reach the storage at all) versus a LUN masking issue (e.g. LUNs not assigned to the right HBA ...
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1answer
56 views

Dell R730 with QLogic 2660 16Gb FC HBAs connected to a Brocade 300 8Gb FC Switch? Will it work?

We have a standard shop with 3x Hypervisors running VMware vSphere 6.0. The hypervisors are currently connected via 8Gb FC link to a Brocade 300 (8Gb FC) switch, which is then connected to our ...
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2answers
109 views

Vtrak E610F console issues and recovery

I have been assigned an E610F Vtrak Storage unit, the previous admin left and did not leave any documentation, so IP Address for Management and Credentials are unknown. I tried using accessing the ...
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0answers
23 views

New SAN space presented cause issues with Win 2008r2 cluster (wont reboot and disk manger wont load)

I have an issue where I have a 2 node Win 2008 r2 cluster with SAN attached storage. Existing storage is on an older array but we are being migrated to a newer one. When the storage team "Zones" new ...
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0answers
43 views

How do I power this SAN safely and with redundancy on the power circuits?

Location: USA We are looking at powering a new Storage Area Network (VNXe3200). There are 10 units in total, each with two power supplies for redundancy. Assuming we can do either single-phase 120V ...
0
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1answer
56 views

IOmeter: Avoid caching and Raw Devices

When testing IOmeter I know always need to be avoid hitting the cache if the logical drive with the OS is testing, some I have some question about it: Do I need to avoid the memory on the controller ...
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1answer
42 views

Exchange 2010 New database on a SAN - best practice

We currently have a single database (on it's own Netapp Volume and LUN) and a separate Volume and LUN for the transaction logs. So, to map it out as the server sees it: C:\ Server Install D:\ ...
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61 views

Unable to view LUNs exported on Linux via fibre switch brocade from IBM San Storage

I have problem mapping LUNs to my linux box from IBM San Storage Configuration: Host: Debian wheezy Host: Fibre controller QLogic 4Gb dual port DS4700 San Storage using Storage manager 10 brocade ...
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2answers
65 views

How do I connect a disk array? [closed]

I am just starting out with servers and was recently given an IBM DS3200. It is my understanding that this is a disk array, which is just storage that can be attached to a SAN. Am I correct in that ...
3
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2answers
47 views

Removed cluster disk that wouldn't come online, now it wants to be formatted. Can I recover the data?

I inherited a failover cluster hosting several VMs and some storage volumes. It uses a fibre-channel SAN for storage. I updated firmware on the SAN controllers recently and when it came back up one of ...
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2answers
87 views

Can increased disk throughput increase CPU utilization?

We recently upgraded the storage in our data center and migrated all our production systems to it. We noticed that in one machine (an HP_UX IA-64 Oracle database server for SAP), the CPU utilization ...
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1answer
137 views

Centos 6.7 Emulex LPE12002 on Dell can see any targets/LUNS on HP EVA4400 SAN

As the title indicates -- I have a new Dell R730xd running Centos 6.7 with all updates loaded, etc. I also installed the Emulex utilities, etc. The issue is that nothing I try (reboot / ...
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18 views

Correct cable positioning for HP-EVA 4400

I've bought for testing a 4400 hp eva SAN storage. I see 2 controller i/o for disk and 2 controller on hsv300 controller. I have only one disk shelf On manual i read put DP1B with I/O BP2 and BP1A ...
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57 views

SCSI queue depth / command queue settings

I two servers with about 100 LUNs presented to each from an IBM V7000 (Storwize). Each LUN has 8 paths - 2 FC ports x 2 FC switches x 2 V7000 heads - so about 800 devices. Devices/paths are managed ...
9
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1answer
163 views

Mixing HBAs in a failover cluster?

I have a two server failover cluster, and for various reasons - they're on mismatched hardware. One has Emulex HBAs installed, the other Qlogic. I'd be twitchy about using two different ...
0
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1answer
31 views

bbwc battery replacement on MSA1000?

Noob warning Would someone tell me where it's located at so I can replace it? This doc tells me it has one. http://h10032.www1.hp.com/ctg/Manual/c00147475.pdf I took the lid off of one this morning ...
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2answers
100 views

SQLServer Configuration - How to refute 1 drive on a SAN is same as multiple physical drives

I inherited a performance investigation problem where a SQLServer 2008( and also 2012 ) database has its Data, Indexes and Log files all on a single drive D: The D: drive is actually part of a SAN. I ...
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0answers
55 views

Backup strategy for LVM file sytem on NFS file server connected to SAN

I have setup a server (CentOS) on which I have connected to several LUNs from a SAN via iSCSI then multipath, resulting in multiple physical volumes I can use for LVM (dm1 ...). From the file server, ...
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0answers
37 views

IBM DS8300 harddisk replacement

Does anyone have experience with IBM DS8300 harddisk replacement? I have problem with disk failure on some DS8300 and I don't have any experience with storage system before. If there any article or ...
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0answers
145 views

Can't use hostnames to connect to SMB shares, only IP addresses

Right now I have a cluster of servers connected to a single storage server. 3 Hypervisors, 1 Storage Server The ethernet interfaces on the hypervisors are on a different subnet than the ethernet ...
3
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1answer
61 views

Best practices for migrating to new SAN

My collaborator is splitting from his institute and wants help moving his application and data off the institute's network. And of course things are moving quickly. He has 12 TB of image data on a ...
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1answer
470 views

FreeBSD VMware and CAM status: SCSI Status Error

I'm running a FreeBSD 10.1-RELEASE-p19 on a VPS (VMware). My ISP is experience a rapid data growth, and these messages spontaneous started to show up in our logs a week ago. Sep 25 09:00:50 srv03 ...
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2answers
92 views

How Data Moving in Storage Area Network

I have a question about how data moves through a SAN. For example: Within an iSCSI SAN if Server A is mounted with a SAN disk and wants to copy data to Server B which is also mounted with a SAN disk, ...
0
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2answers
168 views

SAN: How to determine amount of LUN and CSV

We have inherited Hyper-V environment (2008 R2) with SAN storage (HP4500 hardware). Two hosts and two SAN's for redundancy. Whilst I understand virtual machines well, I guess, my knowledge of storage ...
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1answer
35 views

Trying to add 2nd iSCSI VDS to XenServer, receiving error about LUN already used by other SR

I've stepped out of my comfort zone here. Some background. I just provisioned a 2nd vdisk+volume on a HP MSA2000. This SAN is has another vdisk+volume linked to Xenserver. I set the mapping to the ...
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2answers
76 views

First Exchange 2013 design for on-prem SMB. Did I miss anything? [closed]

Seeing as this is my first design, I'm hoping to make sure I haven't missed any glaring issues before deployment.