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Portal Management |
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Portal Management |
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Portal Management
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Portal Management |
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Portal Management |
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The NAS supports a built-in iSCSI (Internet Small Computer System Interface) service for server clustering and virtualized environments.
Topics covered in this chapter:
The NAS supports built-in iSCSI service. To use this function, follow the steps below:
| 1. | Install an iSCSI initiator on the computer (Windows PC, Mac, or Linux). |
| 2. | Enable iSCSI Target Service on the NAS and create an iSCSI target. |
| 3. | Run the iSCSI initiator and connect to the iSCSI target (NAS). |
| 4. | After logging in, format the iSCSI target (disk volume.) You can start using the disk volume on the NAS as a virtual drive on the computer. |
When referring to your computer and the storage device, the computer is called an initiator because it initiates the connection to the device, which is called a target.
Note: It is NOT recommended to connect to the same iSCSI target with two different clients (iSCSI initiators) at the same time, as it may lead to data loss or disk damage. |
iSCSI Quick Configuration Wizard
A maximum of 256 iSCSI targets and LUNs can be created. For example, if you create 100 targets on the NAS, the maximum number of LUNs you can create is 156. Multiple LUNs can be created for each target. However, the maximum number of concurrent connections to the iSCSI targets supported by the NAS varies depending on network infrastructure and application performance. Excessive concurrent connections may impact NAS performance.
Follow these steps to configure the iSCSI target service on the NAS.
| 1. | Under "Portal Management" enable iSCSI target service. Apply the settings. |
| 2. | Go to "Target Management" and create iSCSI targets on the NAS. If you have not created any iSCSI targets, the Quick Installation Wizard will automatically be launched and prompt users to create iSCSI targets and LUNs. Click "OK". |
| 3. | Select to create an iSCSI target with a mapped LUN, an iSCSI target only, or an iSCSI LUN only. Click "Next." |
| 4. | Create iSCSI target with a mapped LUN. |
| 5. | Click "Next." |
| 6. | Enter the target name and target alias. You can check the options "Data Digest" and/or "Header Digest" (optional). These are the parameters that the iSCSI initiator will be verified when it attempts to connect to the iSCSI target. |
| 7. | Enter the CHAP authentication settings. If you enter the username and password settings under "Use CHAP authentication" only, only the iSCSI target authenticates the initiator, i.e. the initiators have to enter the username and password settings here to access the target. |
Mutual CHAP: Enable this option for two-way authentication between the iSCSI target 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.
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Username limitation |
Password limitation |
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Use CHAP authentication |
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Mutual CHAP |
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An iSCSI LUN is a logical volume mapped to the iSCSI target. Select one of the following modes to allocate disk space to the LUN:
| • | Thin Provisioning: Allocate disk space in a flexible manner. You can allocate disk space to the target anytime regardless of the current storage capacity available on the NAS. Over-allocation is allowed as the storage capacity of the NAS can be expanded by online RAID capacity expansion. |
| • | Instant Allocation: Allocate the disk space to the LUN instantly. This option guarantees the disk space assigned to the LUN but may take more time to create the LUN. |
| 1. | Enter the name of the LUN and specify the LUN location (disk volume on the NAS.) Enter the capacity for the LUN. Click "Next". |
| 2. | Confirm the settings and click "Next". |
| 3. | When the target and the LUN have been created, click "Finish". |
| 4. | The target and LUN are shown on the list under the "Target Management" tab. |
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© 2017 QNAP Systems, Inc. |
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