User guide

ASUSTOR NAS User Guide
Page 19 of 51
NAS 352 – Online RAID Level Migration and Capacity Expansion
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Here you can check on the status of all your disks. You can also inspect their S.M.A.R.T.
information and conduct tests on your disks.
 S.M.A.R.T. Info: S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Report
Technology. It is a type of self-monitoring mechanism for disks that detects and
reports on various indicators of reliability, with the hope of anticipating failures.
 Disk Doctor: Here you can check your disks for bad sectors or conduct S.M.A.R.T.
tests.
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iSCSI is a type of network storage technology that offers high expandability and low
implementation costs. Through existing network infrastructure and iSCSI you can use your
NAS to expand existing storage space or have it act as a backup destination. iSCSI
consists of two ends, a target and an initiator. The initiator is used to search for iSCSI
hosts and to set up targets.
 IQN: IQN (iSCSI Qualified Name) is the unique name for each iSCSI target. This
name should not be the same as any of the other target IQNs on other hosts.
 CHAP Authentication: CHAP authentication can be used to verify a user’s identity. If
you choose to use CHAP authentication, a CHAP password must first be entered from
the initiator for verification before it can connect to the target.
 Mutual CHAP Authentication: Mutual CHAP authentication requires both the target
and the initiator to have usernames and passwords. When establishing a connection,
the target and the initiator will have to authenticate each other using their respective
credentials.
 LUN Pool: Here you can check on the status of all iSCSI LUNs and assign
corresponding iSCSI targets.
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NAS 308 – Introduction to iSCSI