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Synology DiskStation User's Guide
Based on DSM 3.1
53 Chapter 4: Manage Storage Space
Term Explanation
IQN: IQN (iSCSI Qualified Name) is a set of unique name for an iSCSI Target. It should not conflict with iSCSI
Target IQNs on other servers. IQN must be less than 128 characters and can include letters(case insensitive),
numbers, colons, dashes, and dots. The suggested naming format is iqn.[date].[domain]:[device identifier], for
example: iqn.2000-04.com.synology:storage.diskarray.1.
CHAP authentication: If you select CHAP, the server will be able to verify the client's identity. In Mutual
CHAP, both the client and the server will authenticate each other. Username can be composed of 1 ~ 12 letters
and numbers, and password can be composed of 12 ~ 16 letters and numbers.
To remove an iSCSI Target:
You can remove an iSCSI Target and any mapped iSCSI LUNs. Note that when removing an iSCSI LUN, all data
on the iSCSI LUN will be deleted.
1 Select the iSCSI Target you want to remove.
2 Click Remove.
3 If you want to remove mapped iSCSI LUNs, select Delete mapped iSCSI LUNs as well and select the ones
you want to remove.
4 Click OK.
To edit an iSCSI Target:
1 Select the iSCSI Target you'd like to edit.
2 Click Edit.
3 Edit the settings to your preference. Click OK to save the changes.
Term Explanation
CRC Checksum: Enable CRC Checksum to check if any error occurred during data transmission.
Multiple Sessions: Allow multiple sessions from one or more initiators to connect to the same iSCSI Target at
the same time. To protect your files from corruption or unexpected data loss, it is strongly suggested that you
use a shared file system or cluster system such as VMware Virtual Machine File System (VMFS) and Oracle
Cluster File System (OCFS).
Masking: Masking allows an iSCSI Target to be exclusively accessed by specified iSCSI initiator IQNs.
To enable or disable an iSCSI Target:
1 Select the iSCSI Target you'd like to enable or disable.
2 Click Enable or Disable.
To register iSCSI Targets with an iSNS server:
1 Click iSNS.
2 Tick Enable iSNS.
3 Enter the IP address of the iSNS server in the iSNS Server field.
4 Click OK.
Term Explanation
iSNS
iSNS (Internet Storage Name Service) are often used in a local area network with complex storage deployment,
facilitating IT staffs to discover storage and manage iSCSI devices. You can register all the iSCSI Targets on
your DiskStation with the iSNS server on your network.