QNAP Systems Ts 253 User Guide

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and the initiator. The target authenticates the initiator using the first set of username and 
password. The initiator authenticates the target using the Mutual CHAP settings.  
6. Click Next.        
7. Click Finish.        
8. A new target will be created.    
 
Creating iSCSI LUNs 
Follow the steps below to create a LUN for an iSCSI target: 
1. Click Create.        
2. Select iSCSI LUN only and click Next.          
3. Configure the following settings: 
LUN type 
LUN allocation method...

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visible to authenticated initiators. 
Disabled The LUN is inactive and is invisible to the 
initiators. 
  
Refer to the table below for actions (the Action button) available to manage iSCSI targets and 
LUNs: 
Action Description 
Deactivate  Deactivate a ready or connected target. Note that the connection from the 
initiators will be removed. 
Activate Activate an offline target. 
Modify Modify the target settings: target alias, CHAP information, and checksum 
settings. 
Modify the LUN settings:...

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7. Select the target to map the LUN and click Apply.          
8. The LUN will be mapped to the target.  
 
After creating the iSCSI targets and LUN on the NAS, the iSCSI initiator installed on the computer 
(Windows PC, Mac, or Linux) can be used to connect to the iSCSI target and LUN and the disk 
volumes can be used as the virtual drives on the computer. 
  
Expanding iSCSI LUN capacity  
The NAS supports capacity expansion for iSCSI LUNs. To do so, follow the steps below:    
1. Locate an...

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applicable models, please refer to the   product comparison table on the QNAP website. 
 
To use this feature, click Add a Policy. Enter the policy name and the initiator IQN, assign the 
access right for each LUN created on the NAS and click Apply. 
 
For descriptions on each field, refer to the table below:  
Field Description 
Read-only The connected initiator can only read the data from the LUN. 
Read/Write The connected initiator has read and write access rights to the LUN. 
Deny Access The...

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Snapshot Replica (or volumes/LUNs replication between remote servers) is covered in 
Backup Station. For details, please refer to the Snapshot Replica chapter in Backup 
Station.  
Multiple snapshots can only be taken on block-based LUNs, and only one snapshot can 
be taken for file-based LUNs if you use the LUN Backup feature.  
Application consistent snapshots for iSCSI LUN are only available when the Snapshot 
Agent is used and for VMware and VSS-aware applications running on a Windows...

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Snapshot Agent 
QNAP Snapshot Agent supports VMware vCenter and Microsoft Volume Shadow Copy Service (VSS). 
Before taking snapshots from the NAS, the Snapshot Agent notifies vCenter or Microsoft Server to 
create VMware snapshots for each virtual machine and store those VMware snapshots to iSCSI LUNs 
(or to flush all the data into the iSCSI LUN,) thereby ensuring application consistent snapshots.  
 
To check connected servers with Snapshot Agent installed, click Snapshot > SnapAgent. On the...

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Connecting to iSCSI Targets by Microsoft iSCSI Initiator on Windows 
 
Before you start to use the iSCSI target service, make sure you have created an iSCSI target 
with a LUN on the NAS and installed the correct iSCSI initiator for your OS. 
 
ISCSI initiator on Windows: 
Microsoft iSCSI Software Initiator is an official application for Windows that allow users to 
implement an external iSCSI storage array over the network. 
  
Using iSCSI initiator: 
Start the iSCSI initiator from...

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Connecting to iSCSI Targets by Xtend SAN iSCSI Initiator on Mac OS 
 
This section shows you how to use Xtend SAN iSCSI Initiator on Mac OS to add the iSCSI 
target (QNAP NAS) as an extra partition. Before you start to use the iSCSI target service, 
make sure you have created an iSCSI target with a LUN on the NAS and installed the correct 
iSCSI initiator for your OS. 
 
About Xtend SAN iSCSI initiator: 
ATTOs Xtend SAN iSCSI Initiator for Mac OS X allows Mac users to utilize and benefit...

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Connecting to iSCSI Targets by Open-iSCSI Initiator on Ubuntu Linux 
 
This section shows you how to use the Linux Open-iSCSI Initiator on Ubuntu to add the iSCSI target as 
an extra partition. Before you start using the iSCSI target service, make sure you have created an 
iSCSI target with a LUN on the NAS and installed the correct iSCSI initiator for your OS. 
 
About Linux Open-iSCSI Initiator: 
The Linux Open-iSCSI Initiator is a built-in package in Ubuntu 8.04 LTS (and later). You can...

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You should be able to see the login message as below: 
Login session [iface: default, target: iqn.2004-04.com:NAS:iSCSI.ForUbuntu.B9281B, portal: 
10.8.12.31,3260] [ OK ] 
 
Check the device status with dmesg. 
 # dmesg | tail 
 
Enter the following command to create a partition, /dev/sdb is the device name. 
 # fdisk /dev/sdb 
 
Format the partition. 
 # mkfs.ext3 /dev/sdb1 
 
Mount the file system. 
 # mkdir /mnt/iscsi 
 # mount /dev/sdb1 /mnt/iscsi/ 
 
You can test the I/O speed using the...