Questions tagged [storage-area-network]
A SAN is a Storage Area Network, for providing block-level access to storage subsystems across a network.
913
questions
0
votes
0
answers
51
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 ...
- 141
0
votes
0
answers
19
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 ...
- 101
0
votes
1
answer
22
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 ...
- 403
0
votes
1
answer
72
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 ...
- 101
2
votes
0
answers
51
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 ...
- 177
1
vote
0
answers
180
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 ...
- 11
0
votes
0
answers
61
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
88
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....
- 31
1
vote
1
answer
35
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 ...
- 151
4
votes
4
answers
247
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 ...
- 41
0
votes
0
answers
17
views
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" || ...
0
votes
0
answers
66
views
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 ...
- 101
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 ...
- 11
3
votes
3
answers
343
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 (...
- 111
0
votes
2
answers
342
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
1
vote
0
answers
402
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 ...
- 11
1
vote
1
answer
128
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 ...
- 166
0
votes
1
answer
262
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-...
- 167
0
votes
1
answer
423
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 ...
- 167
0
votes
1
answer
153
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
401
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).
...
- 366
3
votes
2
answers
96
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 ...
- 31
0
votes
1
answer
573
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 ...
- 13
0
votes
1
answer
151
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 ...
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 ...
- 135
1
vote
0
answers
51
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 ...
- 11
0
votes
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 ...
- 1
0
votes
1
answer
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 ...
- 119
0
votes
2
answers
2k
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 ...
- 27
2
votes
1
answer
923
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 ...
- 371
0
votes
1
answer
15
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 &...
- 1
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 ...
- 167
0
votes
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 ...
- 111
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 ...
- 5,818
0
votes
1
answer
43
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
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 ...
- 98
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. ...
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 ...
- 1,477
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 ...
- 299
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 ...
0
votes
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
...
- 1
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 ...
- 674
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 ...
- 11
0
votes
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 ...
- 21
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. ...
- 31
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?
- 31
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-...
- 56
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 "...
- 9
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? ...
- 51
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 (...
- 49