Emerson MVME147 Manuel D’Utilisation
SCSI Controller Reset Packet
7-41
7
SCSI Controller Reset Packet
This function sends a bus device reset message ($0C) to the controller specified
in the packet. All outstanding packets are returned with a "reset status" ($0A).
This command affects only the specified controller. After the controller reset
command, the user has to send an "attach" command to SCSI firmware in
order to interface with the controller again because the specified controller
attach table entry is cleared.
in the packet. All outstanding packets are returned with a "reset status" ($0A).
This command affects only the specified controller. After the controller reset
command, the user has to send an "attach" command to SCSI firmware in
order to interface with the controller again because the specified controller
attach table entry is cleared.
N
ote
Some controllers do not support this message; the results
are unpredictable unless the controller supports the
controller reset message ($0C).
are unpredictable unless the controller supports the
controller reset message ($0C).
Erase Packet
The erase command ($19) erases the entire tape in the specified drive. All
tracks are erased in one forward motion; the tape then rewinds and is
positioned at the BOT.
tracks are erased in one forward motion; the tape then rewinds and is
positioned at the BOT.
The tape must be positioned at BOT before this command is issued. An
attempt to erase a tape not at BOT results in an illegal request ($xx25) status.
attempt to erase a tape not at BOT results in an illegal request ($xx25) status.
The table below shows the erase packet.
Even Byte \
Odd Byte \
FC
B8
74
30
+$00
Controller LUN
Device LUN
+$02
Status Byte 0
Status Byte 1 (Note 1)
+$04
0
0
0
0
+$06
0
0
0
0
+$08
0
0
0
0
+$0A
0
0
0
0
+$0C
0
0
0
0
+$0E
0
0
0
0
+$10
0
0
0
0