Table of Contents
What is LUN masking and zoning?
LUN masking takes place at either the host bus adapter (HBA) or storage controller, and restricts the hosts’ ability to access specific LUNs. LUN zoning generally takes place on storage-area network (SAN) switches and compartmentalises the SAN fabric, grouping hosts and storage arrays into zones.
Why do we need LUN masking?
LUN masking is a further constraint added to LUN zoning to ensure that only devices authorized to access a specific server can access the corresponding port.
What is LUN masking in VMware?
LUN masking is a process wherein you would mask LUNs, or make those LUNs inaccessible to the VMware ESXi hosts. There are a couple of ways that you could find the number of LUNs visible to the ESXi hosts, one from the command line and other by connecting directly to the host using the vSphere Client.
What is LUN and how it works?
A LUN can reference an entire RAID set, a single drive or partition, or multiple storage drives or partitions. In any case, the logical unit is treated as if it is a single device and is identified by the logical unit number. A LUN is central to the management of a block storage array in a storage-area network (SAN).
What is storage zoning?
Zoning is a fabric-based service in a storage area network (SAN) that groups together hosts and storage nodes that require communication. The essential requirement for performing zoning is that the nodes can communicate only if they are members of the same zone.
What is a SAN zone?
SAN zoning is a fabric-based service for grouping the devices in a SAN into logical segments to control communications between those devices. The devices communicate directly with each other via high-speed storage media. By default, every server in the SAN can access every storage device in that SAN.
What is the difference between LUN masking and LUN mapping?
Masking refers to making a LUN visible to some servers and not visible to others. Mapping referes to the assignment of a number to a LUN. It can then be presented to a host.
How do I map a LUN to a host?
Mapping LUNs to a Host
- Choose Services > Block Service > Hosts.
- On the Hosts tab page, select the desired host and choose Map > Map LUN. The Map LUN page is displayed on the right.
- Select LUNs. If you select New:
- In the Host LUN ID area, select a method of setting the IDs.
- Click OK.
What is zoning in vmware?
When we want to restrict access of Host specific Storage device than we want to setup zoning. So if we want only specific host to access a storage device this zoning comes into picture and this configuration is performed on FC Switch. By using vLAN technique we can do the segmentation of iSCSI, NFS and FCoE.
Why LUN is used?
In computer storage, a logical unit number, or LUN, is a number used to identify a logical unit, which is a device addressed by the SCSI protocol or by Storage Area Network protocols that encapsulate SCSI, such as Fibre Channel or iSCSI.
How many types of LUN are there?
VDS supports five LUN types: simple, spanned, striped, mirrored, and striped with parity. Simple, spanned, and striped LUNs are non-fault tolerant; mirrored and parity LUNs are fault tolerant.
What is LUN masking and how is it implemented?
LUN Masking is implemented primarily at the HBA (Host Bus Adapater) level. LUN Masking implemented at this level is vulnerable to any attack that compromises the HBA. Some storage controllers also support LUN Masking. LUN Masking is important because Windows based servers attempt to write volume labels to all available LUN’s.
What is ldlun masking?
LUN (Logical Unit Number) Masking is an authorization process that makes a LUN available to some hosts and unavailable to other hosts.
What is loadlun masking in Linux?
LUN masking helps in making a LUN available a specific host while unavailable to others. LUN masking will be implemented at the host bus adapter (HBA) level or switch level and subdivides access to a given port.
What is accesslun masking and how does it work?
LUN masking is a further constraint added to LUN zoning to ensure that only devices authorized to access a specific server can access the corresponding port.