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Questions tagged [lun]

87 questions
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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 the same single VMDK? Should I make two, one for OS…
Jeff
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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 space available on the disk(s) to complete this…
DJYod
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Drobo Thin Provisioning: What happens when you run out of space?

I'm thinking about getting a Drobo S to add some storage on a Windows Server 2008 R2 box. The Drobo offers thin provisioning. While I will only have 4.5TB of space initially, I'd like to use thin provisioning to create a 16TB LUN. If the OS sees…
Brad
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What is the difference between LUN and array ? Arent they same?

Please clarify what do we mean by LUN and Array ? and if they are similar in meaning?. The confusion is because both are presented to specific servers by the combination of different Hard disks or individual Hard disk ( correct me if am worng )
Guruprasad
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ESXi 4.1: how to make use of an iSCSI LUN bigger than 2 TB?

I have a ESXi servers (4.1 U1) connected to an iSCSI NAS, where 4 LUNS have been defined and presented to this host; all the LUNs are 3 TB in size. ESXi correctly sees the LUNs and acknowledges their 3 TB size. I know the maximum size for a VMFS…
Massimo
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Is it possible to query the LUN ID of a list of windows server?

I'm trying a combination of FCINFO and PSEXEC to get the LUN ID (LUN NUMBER) used by servers, but i cant get this information directly from fcinfo. I've also try using WMI until i learned that i should know the wmi namespace of the lun controller…
Matias
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The Linux SCSI layer does not automatically remap LUN assignments

I've got some iSCSI/FC storage, currently using only iSCSI. I have in general no problems with mounting LUNs - under Linux and under Windows. Unfortunately - when I add LUN for my Linux iSCSI initiator - I receive info in messages: Warning!…
Arek B.
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What is better to have more LUNs or more Storages

what is better to have - more LUNs or more Storages. Actually i have 1 storage ESXi per 1 LUN so there are about 15 LUNs and 15 storages. Now there is a kind of problem because the LUNs have different space allocated so if i remove 2 LUNs f.e. 1 2 3…
kamoks
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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-initiator-on-debian-9/ and…
Stonecraft
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Share SCSI DAS enclosure (vtrak m210p) between multiple servers?

I've got a Promise vTrak m210p subsystem. It supports LUN mapping & masking, and has two SCSI channels (2 VHDCI ins & 2 outs on rear of device). I believe this question will probably apply to many devices of this type. According to the literature:…
Boden
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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 mount the LUN normally. Is that normal? Do i need…
embedded
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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# multipath -l mpatha (3600507680190014da0000000000002eb)…
user316926
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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 is very weak. I am trying to understand how our…
Clear Sky
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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@xxxxxxx emcpowera]# powermt display…
reli
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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/ArchiveLUN_chi and ndmpcopy /vol/Archive_chi…
TryTryAgain
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