QNAP TVS-472XT 4-Bay NAS Enclosure - Manual (Page 155)

16. Click Next.
17. Specify the capacity of the VJBOD disk.
Important
The size of the VJBOD disk cannot be changed after creation.
18. Optional: Configure advanced settings.
Setting Description
4K bytes sector size Changing the sector size to 4 KB increases LUN performance for
specific applications and disk types.
SSD cache The SSD cache will be used to improve VJBOD disk access
performance.
19. Click Next.
QTS starts creating a dedicated iSCSI target on the remote NAS for the VJBOD disk.
20. Optional: Enable CHAP authentication.
An initiator must authenticate with the target using the specified username and password. This
provides security, as iSCSI initiators do not require a NAS username or password.
• Username
• Length: 1 to 127 characters
• Valid characters: 0 to 9, a to z, A to Z, colon (:), period (.), hyphen (-)
• Password
• Length: 12 to 16 characters
• Valid characters: 0 to 9, a to z, A to Z, all special characters
21. Optional: Enable CRC checksums.
Initiators and targets communicate over TCP connections using iSCSI protocol data units (PDU). The
sending device can send a checksum with each PDU. The receiving device uses this checksum to verify
the integrity of the PDU, which is useful in unreliable network environments. There are two checksum
types, which can be enabled separately.
Checksum Type Description
Data Digest The checksum can be used to verify the data portion of the PDU.
Header Digest The checksum can be used to verify the header portion of the
PDU.
22. Click Next.
23. Review the summary, and then click Next.
QTS creates the iSCSI target and LUN on the remote NAS, and then creates a VJBOD disk using the LUN.
The disk appears at Storage & Snapshots > Storage > Disks/VJBOD .
24. Select a follow-up action.
Action Description
Create New Storage Pool Creates a storage pool using the VJBOD disk
Create New Static Volume Creates a static volume using the VJBOD disk
QTS 4.4.x User Guide
Storage & Snapshots 154