Installing and Using the Admhost and Admsnap Utility

Using the Admhost Utility

Table 4-1 lists the admhost commands and describes their function in

SAN Copy sessions.

Table 4-1

admhost functions and descriptions

 

 

 

 

Function

Description

Syntax and Examples

 

 

 

 

 

 

admhost lun_activate

The admhost lun_activate command scans the bus for

admhost lun_activate

 

new devices and assigns a drive letter to all Symmetrix

[-llun_wwn -ddriveletter][-h]

 

and CLARiiON devices that do not already have one.

where

 

Use the -land -dswitches to scan the bus for new

 

-llun_wwn specifies the WWN of the LUN

 

devices and assign a drive letter to a device that has a

 

to which you want to assign a drive letter

 

specific world wide name (WWN). This command does

 

(requires the -dswitch).

 

not assign drive letters to any other devices.

 

-ddriveletter specifies the drive letter you

 

 

 

 

If admhost_activate is used and no new devices are

want to assign to the specified LUN

 

(requires the -lswitch).

 

found, and drive letters are already assigned to the

-hdisplays the help message

 

CLARiiON and Symmetrix logical units, admhost reports

 

an error message.

If the admhost lun_activate command

 

 

 

 

 

 

activates more than one device, the drive

 

 

 

letter is assigned to the first device in the

 

 

 

list.

 

 

 

admhost

The admhost lun_deactivate command attempts to

admhost lun_deactivate

lun_deactivate

take devices offline and make them inaccessible to the

-oobjectName [-tobject type][-h]

 

operating system. The command deletes the drive letter

where

 

and dismounts the device.

--oobjectName specifies the drive letter of

 

Use the admhost lun_activate command to bring the

 

the device you want to deactivate.

 

volume back online.

If you specify the device name, admhost

 

 

 

 

 

 

finds the device, deletes its drive letter,

 

 

 

dismounts it, and then takes the device

 

 

 

offline.

 

 

 

-tobject_type is an optional switch that

 

 

 

specifies the object type (device or

 

 

 

driveletter) of the device you want to

 

 

 

deactivate.

 

 

 

-hdisplays the help message

 

 

 

 

4-4

EMC CLARiiON Server Support Products for Windows Installation Guide

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EMC CLARiiON manual Using the Admhost Utility, Admhost lunactivate
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CLARiiON specifications

EMC CLARiiON is a storied name in the realm of data storage solutions, renowned for its reliability, scalability, and advanced features. As a part of EMC's pioneering approach to enterprise storage, CLARiiON systems are designed to meet the demands of businesses ranging from small enterprises to large data centers.

One of the standout features of EMC CLARiiON is its support for both Fibre Channel and iSCSI protocols, which allows for versatile deployment options in various network environments. This dual-protocol capability is key in enabling organizations to leverage existing network infrastructures while providing the flexibility to scale as needed.

The architecture of CLARiiON is built on a modular design, featuring a series of storage processors, also known as storage controllers. This design not only enhances performance but also allows for easy upgrades and expansions. The use of RAID (Redundant Array of Independent Disks) technology ensures data redundancy and integrity, offering a variety of RAID levels to cater to specific performance and data protection needs.

EMC CLARiiON also integrates advanced data management features such as online capacity expansion, which enables administrators to add drives without disrupting operations. This is complemented by the system's support for thin provisioning, which allows for more efficient use of storage space, presenting only the amount of storage that is actually being used.

One notable technology employed by CLARiiON is the Storage Resource Management (SRM) suite, which provides powerful tools for monitoring, reporting, and managing storage usage and performance. This suite enables IT teams to optimize their storage investments by identifying trends and potential issues before they affect service levels.

Another critical aspect is the inclusion of automatic load balancing features, which help distribute workloads evenly across available storage resources. This promotes optimal performance and reduces the risk of bottlenecks during peak usage times. Additionally, the snapshot technology embedded in CLARiiON offers users the ability to create point-in-time copies of data, facilitating rapid recovery in the event of data loss or corruption.

Lastly, EMC CLARiiON systems are designed with high availability in mind. They often feature redundant components and advanced failover capabilities to ensure seamless operations. With these characteristics, EMC CLARiiON stands as a robust solution for organizations seeking to enhance their data storage strategy, driven by cutting-edge technology and tailored to meet diverse business requirements.
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