LaCie 2BIG NAS User Manual page 346

Data digest: Enable checksum to verify the integrity of the SCSI Protocol Data Unit (PDU). Since it adds a
step to the reading and writing of data, performance will be affected.
Header digest: Enable checksum to verify the integrity of the header portion of the SCSI PDU. Similar to
Data digest, performance will be affected.
Multiple sessions: Select this option only if your iSCSI target will be managed within a SAN cluster
environment. The SAN cluster allows multiple iSCSI initiators to access the iSCSI target at once.
6. Check the box next to CHAP within Advanced parameters to configure a password for the iSCSI target.
CHAP (Challenge Handshake Authentication Protocol) will secure access to the iSCSI target via a password
that is 12 to 16 characters. There are two levels of CHAP:
CHAP: The iSCSI initiator must enter a name and a password to connect to the iSCSI target. This is also
referred to as a Secret or Target secret.
Mutual CHAP: Both the iSCSI target and the iSCSI initiator authenticate each other. Select this box to enter
the name and password configured on the iSCSI initiator that will access the LaCie NAS's iSCSI target.
LaCie 2big NAS | LaCie 5big NAS Pro User Manual 346