Questions tagged [storage-area-network]
A SAN is a Storage Area Network, for providing block-level access to storage subsystems across a network.
919
questions
0
votes
1
answer
38
views
Moving Windows file server contents from one iSCSI LUN to another
Good day,
I have a fileserver role on a Win2016 Failover Cluster backed by an NTFS volume on an iSCSI LUN.
I need to move its contents to another iSCSI LUN, on another block storage system.
The ...
0
votes
1
answer
84
views
SAN VLAN configuration
I'm repurposing an old SAN device for some additional non-critical storage on a VM on a 3-host S2D cluster. I can't dedicate the switches at the moment like what seems to be recommended so I need some ...
0
votes
2
answers
587
views
Server's Disk Queue Length is high, but Disk Bytes/sec is lower than it's capable of
I have an environment running SQL Server on a Windows VMWare platform using a SAN with SSDs set up in RAID 6, and using Veeam for server backups and LiteSpeed for SQL Server backups.
I've had a ...
1
vote
1
answer
146
views
How a failover in Active/Passive SAN multipath should be properly handled on Linux multipath system?
I try to create a multipath configuration with SAN HPE EVA 6350 (2xHSV340 controllers with iSCSI mezzanines and FC/iSCSI multiplexers) and Linux debian 12 systems over iSCSI.
Vdisks created on EVA ...
5
votes
2
answers
263
views
Am I doing this wrong? Networking - High Availability: SAN, MSFT Failover Cluster, NIC Teaming
I have been working in a lab environment to figure out how to design a SAN with a Microsoft failover cluster using multiple NICs, MPIO and iSCSI. I'll try to add as much useful information as I can, ...
3
votes
1
answer
198
views
Howto: Block or File replication across 3+ nodes without a SAN
The setup
I admin the backend for a website that currently exists on a single node using Nginx (webserver), Neo4J (database) and Wildfly (app server). The website is getting enough traffic that we ...
0
votes
1
answer
488
views
Non-valid paths in "multipath -ll" output
I see paths that are no longer valid along with valid ones. How do I prevent them showing up in the output. I expect four valid paths.
The volume was earlier exported with LUN 13 and later 14 which ...
0
votes
0
answers
290
views
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 ...
0
votes
0
answers
47
views
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 ...
0
votes
1
answer
52
views
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 ...
0
votes
1
answer
354
views
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 ...
3
votes
1
answer
304
views
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 ...
2
votes
1
answer
458
views
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 ...
0
votes
0
answers
92
views
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 ...
3
votes
2
answers
98
views
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....
1
vote
1
answer
74
views
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 ...
5
votes
4
answers
641
views
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 ...
3
votes
2
answers
1k
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 ...
3
votes
3
answers
406
views
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 (...
0
votes
2
answers
639
views
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 ...
1
vote
0
answers
600
views
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 ...
1
vote
1
answer
190
views
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 ...
0
votes
1
answer
392
views
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-...
0
votes
1
answer
745
views
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 ...
0
votes
1
answer
193
views
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 ...
1
vote
1
answer
690
views
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).
...
3
votes
2
answers
127
views
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 ...
0
votes
1
answer
965
views
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 ...
0
votes
1
answer
189
views
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 ...
4
votes
2
answers
302
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 ...
1
vote
0
answers
63
views
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 ...
0
votes
1
answer
702
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 ...
0
votes
1
answer
790
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 ...
0
votes
2
answers
3k
views
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 ...
2
votes
1
answer
1k
views
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 ...
2
votes
1
answer
83
views
Multipath in linux for 2 HPE 3PAR replicated storage devices
We are trying to have an HA multipath where from 1 Server (Linux Fedora OS), we connect to 2 different storage devices (HPE 3Par Storage) that are synchronously replicated. Our idea is that in case ...
0
votes
1
answer
18
views
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 &...
5
votes
3
answers
599
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 ...
0
votes
1
answer
101
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 ...
6
votes
1
answer
4k
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 ...
0
votes
1
answer
46
views
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 ...
3
votes
2
answers
242
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 ...
8
votes
1
answer
573
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. ...
5
votes
3
answers
5k
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 ...
14
votes
1
answer
6k
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 ...
0
votes
1
answer
603
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 ...
0
votes
1
answer
161
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
...
0
votes
1
answer
608
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 ...
1
vote
2
answers
657
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 ...
0
votes
1
answer
147
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 ...