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1.2. iSCSI
This section describes the iSCSI API and the
iscsiadm utility. Before using the iscsiadm utility, install the iscsi-initiator-utils package first; to do so, run yum install iscsi-initiator-utils.
In addition, the iSCSI service must be running in order to discover or log in to targets. To start the iSCSI service, run
service iscsi start
1.2.1. iSCSI API
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To get information about running sessions, run:
iscsiadm -m session -P 3
This command displays the session/device state, session ID (sid), some negotiated parameters, and the SCSI devices accessible through the session.
For shorter output (for example, to display only the sid-to-node mapping), run:
iscsiadm -m session -P 0
or
iscsiadm -m session
These commands print the list of running sessions with the format:
driver [sid] target_ip:port,target_portal_group_tag proper_target_name
driver [sid] target_ip:port,target_portal_group_tag proper_target_name
For example:
iscsiadm -m session
tcp [2] 10.15.84.19:3260,2 iqn.1992-08.com.netapp:sn.33615311 tcp [3] 10.15.85.19:3260,3 iqn.1992-08.com.netapp:sn.33615311
tcp [2] 10.15.84.19:3260,2 iqn.1992-08.com.netapp:sn.33615311
tcp [3] 10.15.85.19:3260,3 iqn.1992-08.com.netapp:sn.33615311
For more information about the iSCSI API, refer to
/usr/share/doc/iscsi-initiator-utils-version/README.
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