Emerson ATCA-S201 Manuel D’Utilisation

RTM-ATCA-SXXX Overview 

6806800H62B 

ATCA‐S201 Installation and Use Guide 

 

67 

6   Prepare Logical Volumes 

for iSCSI or file sharing 

RS232 

Console Setup

Ethernet 

Comm. Setup

RAID 

LUN Setup

Logical Volume 

Setup

iSCSI

Device Setup

NFS / SMB

Share Setup

 

 

This chapter explains how to prepare a device resource (example /dev/sda) for iSCSI or NAS file 
sharing.  Disks appearing in the “physical disk” menu 

must first

 be mapped to a Logical Volume 

group before it can be used for these services. Once a device is committed as a shared resource 

for iSCSI or NAS for service, it becomes un-available for new RAID or logical volume definitions 
unless it is first un-shared. 

IP network

1:1 mapping  (JBOD)

1:1 mapping  (JBOD)

Site: B1

Site: B2

Site: B3

Site: B4

 

6.1  Benefits of a logical Volume Group (/dev/vga) 

A volume group is a group of one or more physical disks.  A volume group gives the 
administrator several powerful tools to manage storage resources.  

These features include: 

  Define volume groups with multiple disks or partitions 

  Dynamically increase a volume group by adding new physical disks 

6.1.1  Benefits of a Logical device/disk (/dev/vga/lva0) 

A volume group may be divided into multiple pieces.  Each piece is known as logical 

device but may also be called a logical disk or volume.  A Logical Device offers 

powerful features that include: 

  Essentially unlimited logical devices defined on each volume group 

  Dynamically increase the size of logical device