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3-Administering the MaxNAS R8

to discover the iqn of your new volume. In the Modify iSCSI Volume menu you can enable/ disable the volume, change the date, LUN ID number, enable/disable CHAP and/or change the user name and password. If there is an attached initiator, its IQN will be displayed.

4.3.3 Expanding an iSCSI volume

The MaxNAS R8 has the ability to expand an existing iSCSI Target Volume into unused space


on the same RAID set. To do so, select the iSCSI volume you wish to expand and click				.
In the Space Allocation menu that pops up, set the
			Note: The iSCSI service is temporarily

Expand Capacity slider to the desired amount and
Expand Capacity slider to the desired amount and			disabled while expanding an existing
click	Expand .	This process is reversible.	iSCSI Target volume. It is advised that
			you to do this only during off-peak hours.

4.3.4 iSCSI Thin-provision configuration

Studies show that most users do not exploit their allotted storage capacity to its fullest. Even with extremely large volumes, much of the space may remain unused. Thin-provisioning is a means whereby a network administrator can assign large “virtual” storage spaces that consume only the capacity actually utilized. To create thin provisioned iSCSI volumes follow these instructions:

1.Select the “iSCSI Thin- Provision Target” tab in the Volume Allocation List on the Space Allocation menu. Click

. Set the maximum capacity that you wish to use as a thin- provisioned iSCSI Volume. You can only use unused space for this volume- storage capacity already assigned to Data or

other iSCSI Targets is not eligible for use as an iSCSI Thin-Provision volume. Click OK to create the volume.

2.Once the iSCSI Thin-Provision Volume is created, the provisioning menu will appear beneath

the volume. In the iSCSI Thin-Provision list at the bottom of this page, click . The “Create iSCSI Thin-Provision” menu is identical to the Create iSCSI Target menu except that instead of allocating a specific capacity of the drive for this iSCSI volume you are allocating a “Virtual Size” to this volume. The virtual size of this iSCSI volume will be the size of the drive as reported to the Initiator. The maximum virtual size for a Thin-Provisioned iSCSI Target is sixteen terabytes. Please consult section 4.3.1, Create iSCSI Volume of this Chapter for further information.

4.3.5 Advanced iSCSI Options

On the Advanced iSCSI Options page you can modify the iSCSI Block size and enable CRC/ Checksum verification for all iSCSI volumes. When using volumes of larger than 2tb on system that do not support 64-bit LBA (i.e., Windows XP or older) you would set the block size to 4k. For almost every other application it is best to leave the block size set to 512 Bytes.

MaxNAS Owner’s Manual