マルチパスを使用した iSCSI タイムアウトで推奨される値

Solution Verified - Updated -

Issue

  • iSCSI バックエンドがある RHEL7 LIO ターゲットのマルチパス機能が適切に動作しません。これを解決するにはどうしたら良いですか?
    以下は、ログのサンプルとなります。

    iscsid:Kernel reported iSCSI connection 1:0 error (1021 - ISCSI_ERR_SCSI_EH_SESSION_RST:Session was dropped as a result of SCSI error recovery) state (3)
    iscsid: connection1:0 is operational after recovery (2 attempts)
    kernel: session2: session recovery timed out after 120 secs
    
    kernel: sd 4:0:0:3:Device offlined - not ready after error recovery
    multipathd:8:48: mark as failed
    multipathd: mpathc: remaining active paths:1
    

Environment

  • Red Hat Enterprise Linux 7
  • iSCSI バックエンド

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