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Questions tagged [storage-area-network]

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

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LVM disk is corrupt - is any data recoverable?

Under RHEL7 we have a logical volume consisting of 27 volume groups PVs. Each of these VGsPVs was added sequentially as we ran out of space on the LV. We do not have a backup of the data. There are ...
tmark's user avatar
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IIS with alternate name in SAN Cert prompts for Credentials

I have a server (server01) running IIS with a Web certificate installed. The certificate has the following SANs - server01.companyname.com server02.companyname.com The binding on Default Web Site ...
JakeUT's user avatar
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Simplest way to tell if two logical drives on the same device?

What is the simplest way to determine whether 2 logical drives are on the same device? I have access to remote into the server, but the hosting company isn't reasonably accessible for me to ask the ...
BVernon's user avatar
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Brocade FabricOS 8.2.2d: "rbash: setcontext: command not found" through SSH

Context: I’m writing a script that monitors all SFPs on a Brocade SAN switch and needs to iterate over all FabricID contexts. When I log into a FabricOS 8.2.2d (also with 9.0.1) device through SSH ...
breversa's user avatar
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highly available storage over infiniband: what other than mdraid?

is mdadm over infiniband a bad idea? what is the real trick to get reasonable performing storage to survive a single machine failure? We have been running ceph for a few years now and its great for ...
aep's user avatar
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Cannot get over 100k iops from storage on 10g network on 4k random blocks

My setup description: storage system for vm storage: supermicro server, 1-socket Xeon E5-2620 v4, 82599ES-intel-based RA-Link 10GE network adapter, 8x pci-e 2.0, plugged in 8x pci-e 3.0 slot, debian ...
John Kraft's user avatar
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Cisco MDS zoning a physical server

I'm new to zoning using Cisco MDS (9250i) to a Cisco UCS and was shadowing one of my colleague. I noticed he used the WWPN of the Linux server output systool command. I logged in to the CIMC and ...
Silverburg's user avatar
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SAN Solution for diverse VM Servers

I recently got my fingers into Server Administration. I am currently the only person administering an air gapped network with 8 sites. Most things are dated and old but I get the money to renew things....
Auberginer's user avatar
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Is quorum disk required for standalone installations?

A provider is setting up a single bare-metal Oracle server for us, which will not be part of any grid or cluster. It has over 20 disks connected via fiber to a SAN, each 1TB. OVM is installed on a ...
miturbe's user avatar
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How to plan SAN Storage?

I'm pretty new to the whole SAN thing and am trying to wrap my head around some fundamentals. We are trying to build up a Hyper-V Cluster with two Servers and some external storage media like an HPE ...
P.Dossis's user avatar
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Same commands with different effects if you run it on a network path storage

There is a thing that I don't understand: if I run this command on a network path z="/cygdrive/Z/ANIME E CARTONI/# DA SISTEMARE ED ESTRARRE _ DVD/# 22" mkdir -p "$z/over40gb" || ...
Jack Rock's user avatar
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What is a Suitable Distributed/Cluster/Shared Filesystem for Extremely Fast Access to Volatile Storage?

I'm looking for some sort of distributed/shared filesystem that can be accessed simultaneously by a small number of compute nodes in very close proximity. Given that different shared FSs have quite ...
stellarpower's user avatar
1 vote
1 answer
778 views

Poor Cluster Shared Volume performance when node is not CSV owner

We have a 5 node Windows Server 2016 Failover Cluster setup using an HPE Nimble as shared storage. We're using the cluster for Hyper-V. All virtual machine VHDXs are stored on the cluster shared ...
siu07's user avatar
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ZFS and SAN: issue with data scrubbing

Working as scientists in a corporate environment, we are provided with storage resources from a SAN within an Ubuntu 20.04 virtual machine (Proxmox). The SAN controller is passed directly to the VM (...
Benoit's user avatar
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Dell Equallogic PS 6210 is not Booting up After Power Outage

Our EqualLogic PS 6210 is not booting up properly after the power outage, unfortunately it is not under warranty We can power it on, the disks are blinking and both controller is powered on (but ...
Jabi's user avatar
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High Load Average in Solaris Operating System - Due to high read I/O

In Linux OS, the load average is dependent on multiple factors like CPU utilization, number of uninterruptible sleep processes, and others. On the other hand, Solaris OS load average is dependent on ...
cybermizz's user avatar
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Factually Btrfs is it suitable for block storage usage?

It exists various storage device, file, block and object based. Some filesystem are dedicated to a kind of device. what about Btrfs ? Here I would like to get some technical facts about Btrfs over a ...
bioinfornatics's user avatar
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Single SAN with ocfs2 and gfs2

I have a single SAN with two virtual drives. (i.e., they are separate mounts, but they are mapped to the same IP address) For example, if I do ls /dev/disk/by-path/, I see this: ip-172.16.100.5:3260-...
Ray's user avatar
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iSCSI separation from Ethernet via VLAN

I've set up a small cluster of a few servers along with a SAN. The servers are running Ubuntu 20.04 LTS. Using instructions provided by the vendor (I can't find where I read it before), they ...
Ray's user avatar
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JBOD hard drives report incorrect size

I am trying to setup a netapp ds14 to use with 6 and 8tb SATA drives I got FC to SATA interposer boards and now all the drives are correctly identified and visible, however the capacity that I see is ...
Anton Banchev's user avatar
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How to make Linux discover new LUNs from Pure Storage FlashArray//X70 R3?

When a new LUNs are presented to Fibre Channel SAN from a Pure Storage FlashArray//X70 R3, Linux (SLES) does not find those (as opposed to other FC storage systems like the HP EVA or 3PAR StorServ). ...
U. Windl's user avatar
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3 votes
2 answers
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Query about Thin Provisioning and Thick Provisioning

If i have storage LUN created as thin provisioned and mapped it to VMware Datastore. From that Datastore thick eager VMDK allocated to VM. Does this action reserve VMDK capacity on Backend Storage and ...
Ankit's user avatar
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What kind of operating system SAN device can have?

Ciao, I don't understand does SAN device have an operating system? I know it is connected to servers in data center by san switch and it provides data drives to the servers but how the server ...
Bro Pana's user avatar
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RAID 0 for Development

Hello fellow administrators, I am seeking high level guidance on the following situation: First the context of the environment: internal, all virtual (vmware), development use only, performance ...
birchmeier's user avatar
3 votes
2 answers
281 views

How does SAN provides block access to data?

I was reading about file storage and that lead me to SAN. I read about SAN and that it provides block access to data. I was looking for these concepts in some video, where the guy creates a VM on some ...
rahul sharma's user avatar
1 vote
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Best Practice: Ansys FEA Output Data Storage

I'm trying to make this as least subjective as possible by providing finite inputs and parameters. I truly want to know what is the most resource affective, given the constraints. Given my available ...
illestGnome's user avatar
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1 answer
477 views

DS3400 - no access - only ping via management ethernet port

This is my first post, so sorry if I `ll miss something My task is to collect data from few years old DS3400+EXP3000 ( it was disconnected from power last 2 years). After starting it on front panels ...
Bartek's user avatar
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529 views

Can we mount single SAN block level storage are on two separate VMs having different OSs

We have one VM having HP-UX, on which a storage area is already mounted from SAN as block level vxfs. We need to share the same storage area on another VM in real-time read-only mode but we can only ...
6nagi9's user avatar
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Best free software solution for homemade iSCSI SAN [closed]

I currently have a NAS running ZFS on Ubuntu but have recently changed my main windows software to pool local drives using Stablebit DrivePool. I cannot include networked drives in DrivePool unless ...
AnimeAi's user avatar
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NFS: Single filesystem mount versus multiple mounts of sub directories

We have a file server (fsrv1) that has a 3 mounted XFS filesystems /srv/xfs{1,2,3} each with 3 top-level directories: /home, /scratch and /project. What is the preferred approach to mounting this on a ...
Vince's user avatar
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1 answer
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SAN Connectivity Extension from one Building to Other with 350 Meters distance Recommendations

We have two Data centers, DataCenter-A has all the Backup storage, Datacenter-b has critical servers, We need to backup Datacenter-b Servers via FiberNetwork. We have Brocade 300 Switches on DC-a &...
jas's user avatar
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5 votes
3 answers
573 views

"Bad message" with a new SAN using multipath and iSCSI

I'm configuring a new SAN for a set of Ubuntu 18.04-based servers. Each of nodes can mount the ext4 formatted partition fine. Being new to both multipath and iSCSI, I'm not sure if what I'm seeing is ...
Ray's user avatar
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1 answer
67 views

Multi domain SSL shows all the domains publicly

We have generated Multi-domain SSL for my clients but when visiting any client site If we click on the lock icon and navigate to certificate details can see other client domain names in the subject ...
Ramjith Ap's user avatar
6 votes
1 answer
3k views

can I share the same datastore between different VMware 6.5 clusters?

Is it possible to share the same datastore between multiple VMware clusters of the same version (both 6.5 or both 6.7)? It is the norm to share the datastore between multiple hosts in the same ...
Luke404's user avatar
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Should i partion 100% of my san's HDD's or leave some unused?

I am new to posting here but have been reading and utilizing your extreme brains over the years so Thank you all for being so generous!! I just bought a new Synology NAS for my domain and i am ...
Steven Cole's user avatar
3 votes
2 answers
230 views

Kubernetes cluster shared storage and backup solutions

Which shared storage solutions are common for Kubernetes cluster to implement shared storage persistence for containers? NFS on NAS / iSCSI somehow? How do you backup the data on a Kubernetes with ...
jwalker's user avatar
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8 votes
1 answer
422 views

Can I dynamically expose an entire SCSI host over Fibre Channel, preferably in Linux

Is it possible to expose an entire SCSI host dynamically (an LSI HBA or RAID card) over Fibre Channel, if so how? Preferably on Linux (perhaps targetcli) and with disk hotplugging support. (i.e. ...
Charlie Camilleri's user avatar
5 votes
3 answers
4k views

What differences are between a NAS, a shared disk file system on a SAN, and a distributed filesystem?

https://en.wikipedia.org/wiki/Clustered_file_system#Network-attached_storage says Network-attached storage (NAS) provides both storage and a file system, like a shared disk file system on top of a ...
Tim's user avatar
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14 votes
1 answer
5k views

Linux goes to swap while plenty of RAM installed

I have a linux box that is used as SAN storage. It is equipped with 14 SATA HDDs and the only software it run is iscsi target and zabbix agent. This is physical box, not VM. The RAM size installed is ...
Kevin M's user avatar
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0 votes
1 answer
365 views

SAN volumes not showing in new cluster

Some background.... We have Two hyper-v hosts running server 2012r2 with a number of guests. Msa1040 SAN with two disk pools The hosts are a two server cluster The two hosts connect to the san via ...
Pete Matthews's user avatar
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1 answer
120 views

3PAR 7400 cli setup

Unfortunatelly we don't have a GUI so we use cli. How to allocate physical disk space to free space? I tried servicemag, admithw,admitpd cmd but freespace (showspace) is equal 0 3PAR01 cli% showsys ...
Dmitry's user avatar
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0 votes
1 answer
442 views

Configuring MPIO on Windows to remove duplicate disks

We have shared some storage from a EMC Unity SAN to Windows Server 2012 R2 to use with Veeam. In Disk Management, there are multiple disks listed with the same size. From previous systems, this is ...
neildeadman's user avatar
1 vote
2 answers
494 views

Securely delete individual files from virtual drive on SAN

We have a Windows Server guest OS running on vSphere which has logical drives that ultimately reside on a 3PAR SAN. An auditor has suggested that after deleting sensitive files on the VM, we should ...
Robb Smith's user avatar
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1 answer
107 views

How to Expand Server Storage to Dell PowerEdge With a SAN?

I have recently bought Dell Poweredge T410 server with a Perc 6/I RAID controller to get some hands on experience  with server hardware and play around with Windows Server OSs. I've been looking at ...
willowen100's user avatar
3 votes
0 answers
1k views

The driver detected a controller error on \Device\Harddisk0\DR0 on a virtual machine

The event in question is generated by a virtual machine. The disk 0 is a scsi connected drive to the virtual machine. The vhdx file is in the hyper-v cluster which has the storage from SAN cluster. ...
Alwin's user avatar
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3 votes
2 answers
166 views

Mount NTFS Partition on two Servers - Just one will have RW access

I want to configure my san to present a disk to two windows servers, i would present it one time as RO and to the other Server as RW Will the windows servers have a problem with this setup?
user542769's user avatar
1 vote
0 answers
458 views

IBM 2005-16B switch console cable

I have an IBM 2005-16B switch, and it has a male serial connector on it, and I want to use that to configure the device. I also have a usb to male serial cable, and I have recently created a null-...
Mrwut's user avatar
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0 votes
2 answers
305 views

Two Windows servers in SAN

I have two Windows 2016 servers with QLogic HBA. Servers connect to a Brocade SAN switch. Servers can ping fabric via QLogic FC ping utility. But one server don't see the other. In "Target list" in "...
Anton S's user avatar
5 votes
3 answers
2k views

Boot Windows from SAN

Am not so familiar with Storage. I have some questions around running Physical and Virtual Machines with SAN for Storage. Is it possible to boot OS from a SAN Storage attached to a Physical Server? ...
dunantsm's user avatar
0 votes
1 answer
663 views

Can a HP P2000 G3 SAN with SAS controller direct connect to a Dell PowerEdge Server with a Dell brand HBA [closed]

I am building a home rig and have recently acquired an HP P2000 G3 SAN with SAS controllers. I appreciate these are supposed to connect into a DL380 G7 or G8 with the HP branded SAS interface card (...
Steve Gould's user avatar

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