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>                 -T, --tunable-param <tunable-prop>=<value>
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>                     Specify one or more tunable parameters for all targets that initiator node connected.
>                     Note –
> 
>                     These values should only be modified by an administrator with a good working knowledge of the parameter's impact within the iSCSI network.
> 
>                     Supported tunable-prop options are:
>                     recv-login-rsp-timeout 
> 
>                     Session Login Response Time
>                     The recv-login-rsp-timeout is to specify how long iSCSI initiator will wait for the response of iSCSI session login request from the iSCSI target. Valid value is from 0 to 60*60, default to 60 seconds.
> 
>                     conn-login-max
> 
>                     Maximized Connection Retry Time
>                     To let the iSCSI initiator reestablish the connection to the target in case of IO timeout or connection failure during the given time window.  Valid value is from 0 to 60*60, default to 180 seconds.
> 
>                     polling-login-delay
> 
>                     Login Retry Time Interval
>                     To specify time interval between each login retry when iSCSI initiator to target IO timeout or connection failure. Valid value is from 0 to 60*60, default to 60 seconds.
> 
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>                 -T, --tunable-param <tunable-prop>=<value>
> 
>                     Specify one or more tunable parameters for the given iSCSI target.
>                     Note –
> 
>                     Tunable values should only be modified by an administrator with a good working knowledge of the parameter's impact within the iSCSI network.
> 
>                     Supported tunable-prop options are:
>                     recv-login-rsp-timeout 
> 
>                     Session Login Response Time
>                     The recv-login-rsp-timeout is to specify how long iSCSI initiator will wait for the response of iSCSI session login request from the given iSCSI target. Valid value is from 0 to 60*60, default to 60 seconds.
> 
>                     conn-login-max
> 
>                     Maximized Connection Retry Time
>                     To let the iSCSI initiator reestablish the connection to the given target in case of IO timeout or connection failure during the given time window.  Valid value is from 0 to 60*60, default to 180 seconds.
> 
>                     polling-login-delay
> 
>                     Polling Login Time Interval
>                     To specify time interval between each login retry when iSCSI initiator to target IO timeout or connection failure. Valid value is from 0 to 60*60, default to 60 seconds.