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Advance Option
There are 3 options is currently allow Admin to Enable/Disable to operate Thecus IP
storage associated with iSCSI setting. The details as listed in following screenshot.
With the option changed, it will need to reboot system to activate.
iSCSI CRC/Checksum
To enable this option, the initiator can connect with “Data digest” and “Header
digest” enabled.
Max Connections
The maximum number of connections iSCSI.
Error Recovery Level
The Error Recovery Level (ERL) is negotiated during a leading iSCSI connection
login in traditional iSCSI (RFC 3720) and iSER (RFC 5046).
ERL=0: Session Recovery
ERL=0 (Session Recovery) is triggered when failures within a command, within
a connection, and/or within TCP occur. This causes all of the previous
connections from the failed session to be restarted on a new session by sending
a iSCSI Login Request with a zero TSIHRestart all iSCSI connections on any
failure.
ERL=1: Digest Failure Recovery
ERL=1, only applies to traditional iSCSI. For iSCSI/SCTP (which has its own
CRC32C) and both types of iSER (so far), handling header and data checksum
recovery can be disabled.
ERL=2: Connection Recovery
ERL=2, allows for both single and multiple communication path sessions within
a iSCSI Nexus (and hence the SCSI Nexus) to actively perform
realligence/retry on iSCSI ITTs from failed iSCSI connections. ERL=2 allows
