iSCSI Target
You can create up to 10 or 64 iSCSI Targets on a volume and map iSCSI LUNs to them. By mapping iSCSI LUNs to iSCSI Targets, clients are able to access the space like local disks.
Note: The number of iSCSI Targets supported varies on DiskStation/RackStation models. For detailed product specification, please refer to Synology website.
To create an iSCSI Target:
- Click the Create button.
- Enter the iSCSI Target's information, including Name, IQN, and whether to enable CHAP authentication.
- Click Next.
- Set up iSCSI LUN mapping. Select Create a new iSCSI LUN or Map existing iSCSI LUNs.
- Click Next.
- Click Back to modify or Apply to confirm settings.
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. Username can be composed of 1 ~ 12 letters and numbers, and password can be composed of 12 ~ 16 letters and numbers.
- Mutual CHAP authentication: In Mutual CHAP, both the client and the server will authenticate each other. Any CHAP password used for client authentication must not be configured for authentication of any server, and any CHAP password used for server authentication must not be configured for authentication of any client.
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.
- Select the iSCSI Target you want to remove.
- Click Remove.
- If you want to remove mapped iSCSI LUNs, select Delete mapped iSCSI LUNs as well and select the ones you want to remove.
- Click OK.
To edit an iSCSI Target:
- Select the iSCSI Target you'd like to edit.
- Click Edit.
- 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:
- Select the iSCSI Target you'd like to enable or disable.
- Click Enable or Disable.
To register iSCSI Targets with an iSNS server
iSNS (Internet Storage Name Service) provides the mechanism of centralized managements. You can register all the iSCSI Targets with iSNS server.
- Click the button iSNS and tick the checkbox of Enable iSNS.
- Enter IP address of the iSNS server. Click OK to apply the setting.