Lines Matching full:reset

3 sg_reset \- sends SCSI device, target, bus or host reset; or checks reset
14 reset state (e.g. if a reset is underway) of the \fIDEVICE\fR. When given
16 option it requests a device, target, bus or host reset respectively.
18 A device reset is applied to the Logical Unit (LU) corresponding to
20 in Linux as a LOGICAL UNIT RESET task management function.
22 The ability to reset a SCSI target was added in Linux kernel 2.6.27 . A LLD
23 may send Low level Drivers (LLDs) the I_T NEXUS RESET task management
25 thing (e.g. a hard reset on the link containing a SAS target).
30 Users of this utility can check whether a reset recovery is already underway
31 before trying to send a new reset with this utility. Calling this utility
36 attempt a SCSI bus reset. A bus reset is a SCSI Parallel Interface (SPI)
42 attempt a SCSI device reset. This would typically involve sending a LOGICAL
43 UNIT RESET task management function to \fIDEVICE\fR.
49 attempt a host reset. The "host" in this context is often called
53 without this option, if a device reset (\fI\-\-device\fR) fails then it
54 will escalate to a target reset. And if a target reset (\fI\-\-target\fR)
55 fails then it will escalate to a bus reset. And if a bus
56 reset (\fI\-\-bus\fR) fails then it will escalate to a host reset. With this
57 option only the requested reset is attempted. An alternate option name of
64 attempt a SCSI target reset. A SCSI target contains one or more LUs. This
65 would typically involve sending a I_T NEXUS RESET task management function
67 in SAS a hard reset on the link that contains the target).
77 following. First it tries a device reset and if that is not successful tries
78 a target reset. If that is not successful it tries a bus reset. If that is
79 not successful it tries a host reset. The "device,target,bus,host" order is
80 the reset escalation that the \fI\-\-no-esc\fR option attempts to stop. In
87 SAM\-4 and 5 define a hard reset, a LOGICAL UNIT RESET and a I_T NEXUS
88 RESET. A hard reset is defined to be a power on condition, a microcode
89 change or a transport reset event. LOGICAL UNIT RESET and I_T NEXUS
90 RESET can be requested via task management functions (and support for
91 LOGICAL UNIT RESET is mandatory). In Linux the SCSI subsystem leaves it up
92 to the LLDs as to exactly what type (if any) of reset is performed.
93 The "bus reset" is SCSI Parallel Interface (SPI) concept that may not map
94 well to recent SCSI transports so it may be a dummy operation. A "host reset"
96 to the \fIDEVICE\fR. Note that a "host reset" and a "bus reset" may cause
102 Prior to SAM\-3 there was a TARGET RESET task management function. And in
103 SAM\-4 I_T NEXUS RESET appeared which seems closely related: the "I_T"
107 For example SAS has a link reset in which both ends of a physical link (e.g.
112 reset while in the current version \fI\-h\fR is equivalent to \fI\-\-help\fR
113 and both \fI\-H\fR and \fI\-\-host\fR invoke a host reset. For backward
115 SG_RESET_OLD_OPTS . In this case \fI\-h\fR will invoke a host reset and the
122 sg_reset: starting host reset
124 sg_reset: completed host reset