RTM-ATCA-SXXX Overview

6Prepare Logical Volumes for iSCSI or file sharing

Configuration Step:

1

2

3

4

5

6

RS232

Ethernet

RAID

Logical Volume

iSCSI

NFS / SMB

Console Setup

Comm. Setup

LUN Setup

Setup

Device Setup

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.

4

AMC disk

 

Physical

Logical

iSCSI & NAS

 

 

modules

 

disks

groups

 

 

 

 

 

 

 

&

 

 

 

Site: B1

 

 

 

volumes

iSCSI

 

 

 

 

 

 

 

 

 

 

 

HW RAID

sda

vga

LUNs

 

 

Site: B2

 

 

Zone-2 Fabric

 

 

 

 

IP network

 

 

 

 

 

 

 

 

 

 

 

 

 

Site: B3

 

1:1 mapping (JBOD)

sdb

 

NFS

Zone-2 Base

IP host

 

 

 

 

share points

Zone-3 RTM

 

Site: B4

 

1:1 mapping (JBOD)

 

vgz

 

 

 

sdc

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CIFS

 

 

 

 

 

 

 

share points

 

 

6.1Benefits 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

6.1.1Benefits 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

6806800H62B ATCA‐S201 Installation and Use Guide

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Emerson ATCA-S201 manual Benefits of a logical Volume Group /dev/vga, Benefits of a Logical device/disk /dev/vga/lva0