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iSCSI Configuration for Linux and UNIX

UPC - 753253015740

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Configuring iSCSI Initiators iSCSI Configuration for Linux and UNIX Before implementing iSCSI on Linux or UNIX systems, consider the following: • The QLogic QLA4010/4050/4052c hardware initiator supports Red Hat Enterprise Linux 3, QU5; Red Hat Enterprise Linux 4, QU1; and SuSE Linux Enterprise Server 9, SP3. This initiator provides CHAP authentication and can connect to multiple targets simultaneously. The SANSurfer utility is included with the HBA to initiate, monitor, and change iSCSI targets using its text-based user interface. • The Cisco-based in-box iSCSI software initiators for Linux support Red Hat Enterprise Linux 3, QU6, Red Hat Enterprise Linux 4, QU2, and SuSE Linux Enterprise Server 9, SP3. • The Open iSCSI-based in-box iSCSI software initiators for Linux support RedHat Linux 5 QU1 and higher, SuSE Linux Enterprise Server 10, SP1 and higher and CentOS 5.0 and higher. • The Open iSCSI-based in-box iSCSI software initiator for UNIX supports Solaris 10 U4. Installation and configuration information for the QLogic QLA4010/4050/4052c HBA is included with the adapter and is also available for download from the QLogic website. Information about the in-box iSCSI intitiators is available from the RedHat, Novell (SuSE Linux), and Sun Microsystems web sites. Using CHAP Authentication to Enable Multiple Linux Systems to Share iSCSI Disks Securely on a SnapServer You can use CHAP authetication to enable multiple Linux systems with in-box initiators to share different iSCSI disks on a SnapServer or SnapServers. To do this, you would set up different Usernames and Passwords for a DiscoveryAddress. For example, on a SnapServer (IP address:192.3.2.193), iSCSI disks can be configured for System A and System B. With CHAP enabled, set the System A Username to a, and set the Password to PasswordForA. Then, for system B, set the Username b, and set the Password to PasswordForB. The configuration will look like the following: In System A's /etc/iscsi.conf, enter the following: DiscoveryAddress=192.3.2.193 Username=a Password=PasswordForA 85

Section	Page
Title Page	1
Contents	7
Preface	13
1 - Administrative Overview	17
GuardianOS Specifications	18
What’s New in GuardianOS	22
SnapServer Manager	28
Connecting to the Server for the First Time	30
Using the Initial Setup Wizard	32
Determining Capacity	33
Scheduling Data Protection Tasks	34
Migrating Data from Legacy Servers to the SnapServer	35
Configuring the SnapServer as a Print Server	35
Configuring the SnapServer as a Simple Web Server	35
Configuring an APC-Brand UPS	35
SnapExtensions	36
Wake-on-LAN Support	36
2 - Network Access to the Server	37
Viewing Current Network Settings	38
TCP/IP Options	39
Configuring TCP/IP Settings	41
Default Network Protocol Settings	44
Windows Networking Configuration	45
Support for Windows Networking (SMB)	45
Support for Windows Network Authentication	46
NFS Access	49
Apple Networking Configuration	50
FTP/FTPS Access	52
HTTP/HTTPS Access	53
Web View	54
DHCP Server	55
Print Server	55
3 - User & Group Management	59
Default User and Group Settings	60
UID and GID Assignments	60
Local Users and Groups	61
NIS Domain	63
4 - Storage Configuration and Expansion	65
Default Storage Configuration	66
Changing the Default Storage Configuration	67
RAIDs	67
RAID Groups	70
Volumes	72
Quotas	76
Setting User Quotas	76
Data Migration	77
Preserving Permissions	77
Expansion Arrays	79
SnapServer EXP E2000	79
Snap Expansion S50	80
Managing Expansion Array Storage	81
Integrating Orphan Expansion Units	82
Disks and Units	83
Replacing Disk Drives on a RAID	83
Adding Disk Drives to a RAID	84
Adding New Disk Drives to Increase Capacity	84
Hot Swapping Disk Drives	86
5 - iSCSI Disks	93
Configuring iSCSI Initiators	94
iSCSI Configuration for Microsoft Windows using MS Initiator	95
Configuring the QLogic QLA4010 and QLA4050/52c iSCSI Initiators for Microsoft Windows	100
iSCSI Configuration for Linux and UNIX	101
iSCSI Configuration for Novell NetWare	102
iSCSI Configuration for VMware	102
iSCSI Configuration for Mac	103
iSCSI Configuration on the SnapServer	104
Creating iSCSI Disks	107
Configuring VSS/VDS for iSCSI Disks	109
6 - Share and File Access	111
Configuring Share and Folder Security Overview	112
Components and Options	115
SnapTrees and Security Models	116
ID Mapping	118
Shares	119
Configuring Share Access	121
Share Access Behaviors	121
Setting User-based Share Access Permissions	122
Creating Home Directories	122
Windows ACLs	123
Setting File and Directory Access Permissions and Inheritance (Windows)	124
Security Guides	125
7 - Snapshots	127
Snapshot Management and Usage	128
Estimating Snapshot Pool Requirements	129
Adjusting Snapshot Pool Size	130
Accessing Snapshots	130
Coordinating Snapshot and Backup Operations	131
8 - Disaster Recovery	133
Backing Up Server and Volume Settings	133
Backing Up the NetVault Database Directory	136
Recovering the NetVault Database	137
Disaster Recovery Procedural Overview	139
Cloning a Server	140
9 - CA eTrust Antivirus Software	141
Antivirus Dependencies	142
Launching the CA eTrust Antivirus GUI	143
The Local Scanner View	143
Scan Job Configuration and Scheduling	144
Defining Scan Jobs	144
Running a Manual Scan Job	146
Scheduling a Scan Job	146
Signature Updates	147
Updating SnapServers that have Internet Access	148
Updating a SnapServer that does not have Internet Access	148
Distributing Updates from One Server to Another	149
Verifying Download Events	151
Alert Options	151
The Move Directory	152
Log View	153
10 - Unicode	155
What is Unicode?	155
Converting to Unicode	155
Unicode and Protocol Interaction	157
How Snapshots Interact with Unicode	159
Backing Up Unicode Servers	159
Unicode and Expansion Arrays	161
A - Backup and Replication Solutions	163
Integrated Backup Solutions for the SnapServer	164
BakBone Netvault	164
Snap Enterprise Data Replicator (Snap EDR)	165
Off-the-Shelf Backup Solutions for the SnapServer	167
Preparing to Install a Backup Solution	167
Preinstallation Tasks	168
Installing the CA BrightStor ARCserve Agent	169
Installing the Symantec Backup Exec RALUS Agent	172
Installing the Symantec NetBackup v6.5 Client	175
Installing the EMC Legato NetWorker Client	177
Backup of iSCSI Disks	182
B - Command Line Interface	183
SnapCLI Syntax	183
SnapCLI Commands	186
Scripts in SnapCLI	193
C - Troubleshooting SnapServers	197
The Meaning of LED Indicators	198
SnapServer NAS N2000 and EXP E2000 Status and Drive Light Behavior	198
SnapServer 110/210 Status and Drive Light Behavior	201
SnapServer 410 Status and Drive Light Behavior	202
SnapServer 500/600 Series Status and Drive Light Behavior	204
SnapServer 4200/4500 Status and Drive Light Behavior	207
SnapServer 18000 Status and Drive Light Behavior	209
Snap Expansion S50 Enclosure, Disk Drive, APC Module, and Controller Behavior	212
Snap Disk 10 Disk Drive and Power Supply Module LEDs	214
Snap Disk 30SA Disk Drive and Power/Fan Module Behavior	216
System Reset Options	219
Resetting the SnapServer to Factory Defaults	219
Performing System Resets Without Network Access	220
Networking Issues	221
Miscellaneous Issues	224
Phone Home Support	226
D - GuardianOS Ports	229
Glossary	233

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Configuring iSCSI Initiators

iSCSI Configuration for Linux and UNIX

Before implementing iSCSI on Linux or UNIX systems, consider the following:

•

The QLogic QLA4010/4050/4052c hardware initiator supports Red Hat

Enterprise Linux 3, QU5; Red Hat Enterprise Linux 4, QU1; and SuSE Linux

Enterprise Server 9, SP3. This initiator provides CHAP authentication and can

connect to multiple targets simultaneously. The SANSurfer utility is included

with the HBA to initiate, monitor, and change iSCSI targets using its text-based

user interface.

•

The Cisco-based in-box iSCSI software initiators for Linux support Red Hat

Enterprise Linux 3, QU6, Red Hat Enterprise Linux 4, QU2, and SuSE Linux

Enterprise Server 9, SP3.

•

The Open iSCSI-based in-box iSCSI software initiators for Linux support RedHat

Linux 5 QU1 and higher, SuSE Linux Enterprise Server 10, SP1 and higher and

CentOS 5.0 and higher.

•

The Open iSCSI-based in-box iSCSI software initiator for UNIX supports

Solaris 10 U4.

Installation and configuration information for the QLogic QLA4010/4050/4052c

HBA is included with the adapter and is also available for download from the

QLogic website. Information about the in-box iSCSI intitiators is available from the

RedHat, Novell (SuSE Linux), and Sun Microsystems web sites.

Using CHAP Authentication to Enable Multiple Linux Systems to Share iSCSI

Disks Securely on a SnapServer

You can use CHAP authetication to enable multiple Linux systems with in-box

initiators to share different iSCSI disks on a SnapServer or SnapServers. To do this,

you would set up different Usernames and Passwords for a DiscoveryAddress.

For example, on a SnapServer (IP address:192.3.2.193), iSCSI disks can be

configured for System A and System B. With CHAP enabled, set the System A

Username to

, and set the Password

PasswordForA

. Then, for system B,

set the

Username

, and set the Password to

PasswordForB

. The configuration will look like

the following:

In System A's

/etc/iscsi.conf

, enter the following:

DiscoveryAddress=192.3.2.193

Username=a

Password=PasswordForA