Questions tagged [lun]
The lun tag has no usage guidance.
88
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Can two hyper-v clusters access the same Lun
Looking at setting up 2 Hyper-V cluster with 3 host server on each cluster and I was seeing how I need to carve out the LUN, which has 25 all flash disk array and 25 SAS drives in order to share this ...
0
votes
1
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23
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Remove bunch of disconnected LUNs by shell script (regex issue)
Have a problem with my script, don't want to run same procedure 200 times with changing LUN number.
Remove the multipath device from ALL paths to the LUN, run echo 1 > /sys/bus/scsi/devices/${H:B:T:...
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1
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1
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439
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Safe deleting a LUN in VMware
I have a LUN in our VMware 6.7.0 world. For a specific project we need to safe-delete (with a standard method like DoD 5220) the data on this LUN with some kind of deletion protocol.
The underlying ...
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0
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54
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Physical Volume Actual Utilization for replacement
I have a Volume Group which consist two physical volume of size 10TB each SSD & NLSAS (yes one very slow and other very fast) so total 20TB.
I created Volume backupvg with the 10TB SSD & ...
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2
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1k
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Connecting to 2 iSCSI targets on same NAS
I have a NAS device with 2 iSCSI LUNs.
These LUNs will only ever be used with one server so no switch is involved. I simply ran a Cat6 cable from a 10GbE port on the Server to a 10GbE port on the NAS....
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0
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272
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Confused about whether my iSCSI share is available/how to make it so
I am attempting to set up iSCSI with a virtual machine as the initiator and the host as the target. I was looking at these instructions, among others: https://www.tecmint.com/setup-iscsi-target-and-...
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1
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794
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Clean LUN on HP MSA P2000 G3
I am trying to deploy a self-host oVirt Engine on a SAN HP MSA P2000 G3 LUN. I created a Vdisk and a volume via the Storage Management Utility (SAN GUI). The volume is already containing data because ...
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Centos 7 server isn't able to see fiber channel LUN SCSI devices
I have a Fiber channel connected via SCSI SAN that I am not able to see. I would like to be able to access these drives as if they were mounted.
Perhaps the entire thing is I have no to little ...
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2
votes
1
answer
4k
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ISCSI target service on Centos OS 7 errors
I have problem with ISCSI Target Utils. Service started normally, but showing errors:
systemd[1]: Starting tgtd iSCSI target daemon...
tgtd[3138]: tgtd: iser_ib_init(3436) Failed to initialize RDMA; ...
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1
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227
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Why is my data not showing up on a shared vmdk on another VM?
Configuration:
Netapp (SAN) providing a 5GB FC LUN to VMware hosts (datastore).
(2) Server 2012R2 datacenter VMs configured with a 5GB shared vmdk using paravirtual SCSI controller with SCSI Bus ...
- 25
3
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1
answer
873
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Unable to mount xfs volume to replay log. Now what?
42TB LUN, formatted in XFS and shared via NFS was reported 'unavailable' by customers. In the end I was forced to restart the file server. The XFS LUN won't mount until it is repaired, and to repair ...
- 870
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1
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1k
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Deleted a Block type LUN on Synology - is this recoverable?
Following some poor doco - a block type LUN on our company Synology was accidentally deleted with some business critical data on it. This LUN wasnt replicated anywhere or backed up. Is it possible to ...
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0
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175
views
LUN doesn't mount after reboot
After changing the size of a LUN (grow) on a RHEL 6 System, the LUN/LV (which is part of a Volume Group) does not mount after a reboot anymore.
I have to execute
vgchange -a y
And after that i can ...
- 466
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1
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301
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Sharing internal storage of ESXi host via fiber channel protocol
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 ...
- 139
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1
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52
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Multipath Drive Association
So i have an issue were the drive mappings for the servers will not line up even though the configs for them match exactly.. The main problem is the path for the drives keeps switching.
foo# ...
- 11
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2
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946
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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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2
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3k
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Is it possible to dynamically resize emc lun which is using powerpath
*I have the below mount which is coming from EMC storage and uses powerpath drivers .Now Storage has resized this to 1.5 TB , is it possible to resize this in host without any downtime .
[root@...
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1
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381
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NetApp - Copy volume data to LUN on same filer
I'm trying to copy a volume /vol/Archive_chi to a LUN (LUN volume = /vol/ArchiveLUN_chi ; LUN = ArchiveLUN ; LUN PATH = /vol/ArchiveLUN_chi/ArchiveLUN).
I tried ndmpcopy /vol/Archive_chi /vol/...
- 1,152
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0
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228
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Optimum LUN size for LVM created NFS share
I have access to roughly 80 TB of capacity via a SAN, which I want to set up as as 2 NFS shares: 1 share of 70 TB and 1 share of 10 TB. The 10 TB share will have full backup to tape, whereas the 70 TB ...
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4
answers
10k
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No LUN available to extend datastore
I have a HP DL380G5 with ESXi 5.5 and x4 146GB Sata disks in a RAID5 array. I have added one more disk to the server exactly as the other ones and, using SmartStart CD I managed to add the disk to the ...
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3
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2
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1k
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Multiple iSCSI LUNs to one Server
I'm reasonably sure i'm ok to do this, but I would love some confirmation.
Simple question, can I have two LUNs from the same SAN attached to the same server?
More detail:
I have a HP MSA2000 SAN, ...
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0
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536
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Does a dead LUN path cause an increase in I/O times on the remaining LUN path(s)?
We use an EMC SAN appliance. There are 2 'paths' from the cluster to the SAN. Today we experienced that one of the LUN paths was 'dead' (as reported in the windows event logs). Presumably the ...
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1
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596
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High availability using Fibre Channel and iSCSI in vSphere
I'm having a hard time understanding shared storage for high availability in vSphere. I have the following kit:
1 x Mac mini (ESXi 5.5 - part of vSphere)
1 x White box PC (ESXi 5.5 - part of vSphere ...
user259430
2
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0
answers
473
views
NPIV Fibre Channel how to make vHBA scsi_hostX persistent after reboot and libvirt
I'm using QLogic 8GB Fibre Channel HBA which has NPIV with CentOS6.5
I created the LUN on the SAN and did the zoning for the virtual WWPN.
In CentOS I do the following to create a virtual HBA:
echo ...
- 21
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votes
1
answer
111
views
Xen cannot see all the LUNs in ISCSI HP StorageWorks MSA2312i Dual Controller Modular Smart Array
I have a HP StorageWorks MSA2312i Dual Controller Modular Smart Array
and a second enclosure.
I have four vdisks:
vd01 (RAID5) (Current Owner A)
vd02 (RAID5) (Current Owner B)
vd03 (RAID10) (...
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-2
votes
1
answer
496
views
sg_map & lsscsi showing old storage version
I am using SUN storage and recently upgraded/refreshed my ISCSI LUN storage.
We have replicated old storage to new storage and attached to our servers.
I can see at SUN storage side that storage is ...
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1
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11k
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ESXi 5 Add an existing lun to datastore without formatting
We have two hosts running VMWare ESXi 5.1.0. Both are connected to a RAID 5 array via iSCSI.
The lun is an existing lun with vm on it but it is not reconized by the hosts after the reboot.
it is ...
- 111
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3
answers
3k
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How to share a fibre channel filesystem between 2 hosts?
I have 2 hosts in isolated networks (no network access from one to another). There is a storage system accessible over fibre channel from both hosts.
Is it possible to have both hosts have a safe ...
- 276
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1
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182
views
New lun doesnt work well
Actually we have a server with Oracle Linux 5.8 in which we present clones of production LUN and then we open a clone of the database for several querys.
The problem begin when we execute this ...
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2
answers
3k
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Sharing a SAN LUN across 2 clients
I have an ISCSI SAN that we purchased to store images for our cluster (2TB of images). After reading, we probably should have gone with a NAS rather than a SAN, but back to the point.
I'm going to ...
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127
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Delete unwanted file from a LUN [closed]
I have a SAN environment with LUNs used only for saving documents (. doc, jpg, mp3, xls etc.).
I would like to know the best way to delete from these LUN to temporary file word, file thumb, ~ tmp, ...
4
votes
2
answers
7k
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iSCSI: LUNs per target?
My question relates specifically to ZFS/COMSTAR but I assume is generally applicable to any iSCSI system.
Should one prefer to create a target for every LUN that you want to expose? Or is it good ...
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1
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732
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Clariion CX300: Removing system disks from a RAID group?
I have a raid group that includes every disk my DPE2.
I want to remove the system disks (0-4) from this RAID group.
From what I read I should i put them in their own RAID group and avoid storing ...
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1
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937
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LUN storage disk in 2 servers, can't see the files
I have one LUN disk connected over FC with linux server ( with centos) and esxi server with VM in Centos. (Two machines work in different LAN's.) In both machines i see this disk. In VM i created the ...
3
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1
answer
3k
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SAN: is it better to have separate LUNs for operating system and data of virtual machines? [closed]
We have an iSCSI SAN that will be used as backing store for virtual machines. We use Xen and will directly present the LUNs as block devices of VMs (so there is no file system with files on it for ...
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0
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636
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Presented LUN displaying 3 disks after fdisk -l
All,
I appreciate in advance any useful responses to the following:
One (1) 800GB LUN from external SAN was presented to 4 RHL servers (2.6.9-78.0.8 x86_64)
Initial < fdisk -l > before reboot ...
- 11
3
votes
2
answers
5k
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How do you remove attached FC LUNS from CentOS 6?
We have a Qlogic QLE2560 HBA running on a Centos 6 server. I am needing to remove the attached LUNS remotely. I do not have any software from qlogic installed on the device. Their are 2 LUNS ...
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2
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354
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LUN device file names mixed
The following listings are from a Linux RHEL box. I'm a bit confused over the following inconsistencies.
Here we have aliases defined for each LUN in multipath bindings file:
mpath0 ...
- 113
4
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1
answer
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Considerations for spanned volumes with SAN's LUN.
I want to know, before going forward, what I can expected in lost of performance (or not) of creating Windows spanned volumes from LUN delivered by a SAN ?
I don't know which kind of SAN is (we don't ...
1
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0
answers
1k
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LUNs disappear after rebooting the ESX/ESXi host
A single LUN among from a group disappeared following the ESXI host restart. Neither the host nor the Vcenter can see it.
I have four virtual machines on the LUN hiden now showing just unknown from ...
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1
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2
answers
292
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Adding storage to ESXi host
We have two hosts running VMWare ESXi 4.1. Both are connected to a RAID 5 array via iSCSI. We added three more disks to the RAID array. Now I need to assign the new storage somehow to the ESXi hosts. ...
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3
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840
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Exchange 2010 VMDK disk design
I am deploying Exchange 2010 on a single server on my VMware/SAN. We have about 100 mailboxes. I will be using normal VMDK disks, so my question is about the disk design. Should I put everything on ...
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1
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398
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How to rebuild my NAS
Today I have a QNAP TS-859U+ with 8 X 2TB disks in it.
As it's was setup on day-1 it uses a single volume on a raid 5.
The volume has currently a mixture of:
2 shared folders
5 iScsi Targets - of ...
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2
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1
answer
4k
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Cannot extend existing data disk over 2TB on windows 2008 with dynamic and gpt part
As my D: disk is almost full (2TB) I extended the FC lun to 2.5TB.
The new 500Go are seen by windows as "Unalloacted" as expected.
I tried to extend the volume but windows says
There is not enough ...
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449
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IBM DS300 SAN, Need to expand partitions on LUN
I have a IBM DS300 SAN, and I have setup one LUN with 2.7 TB. I have this LUN setup with 2 partitions, one 130GB partition, and one 1.27TB partition. I have an additional 1.3TB free space. I would ...
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2
answers
613
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LUN and VMFS 5 sizing assistance
I am working on setting up our vSphere 5 environment. With vSphere 5 you can go > the 2TB VMFS datastore size that you were capped at with in 4.x, etc. What size datastores are people using and ...
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608
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Solaris: Clone/Recreate iSCSI target not backed by a ZFS Volume
Is it possible to re-create or clone an existing iSCSI target not backed by a ZFS volume? I ask because upon rebooting a X4500 Thumper, I was affected by this bug: http://wesunsolve.net/bugid/id/...
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1k
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Can I move a LUN from one phsical server to VM client?
I have a 500GB LUN created over our QNAP, and it's connected/binded to one server 2K3. It is identified on that server as disk E (Dynamic)
I want to remove it from Server A, and connect it to a ...
- 1,791
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1
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290
views
Can I re-assign the scsi letter for virtual floppy?
Having issues with oracle starting up in our cluster environment due to disks not lining up properly. For example, on the problematic host, I see the following.
[1:0:0:0] cd/dvd AMI Virtual ...
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3
answers
614
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Dell MD3200i config query
Just a short query: I have a Dell Md3200i setup to serve LUNs to my 2 physical hosts and I'm running vSphere/ESXi v5 with a number of VM's. Is it normal behavior for ALL VM's and LUN's to run off the ...
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