Saf-Te Write Buffer Commands; Write Device Slot Status (10H) - Sun Microsystems StorEdge D2 Array Best Practices Manual

2 0-7 Reserved
3 0 (Slot) Device Inserted Flag
1 (Slot) Prepared for
Insertion/Removal Flag
2 (Slot) Prepared for operation
Flag
3-7 Reserved
6.3

SAF-TE Write Buffer Commands

This section provides detailed information about the
PERFORM SLOT OPERATION
6.3.1

Write Device Slot Status (10h)

This command informs the LSI53C040 of the state of each slot and activates device status
LEDs. In general, the
it knows the status of the devices in each slot. Three bytes are associated with each device
slot. Byte 1, 2, and 3 contain the desired state for the device in slot 0; Bytes 4, 5, and 6 con-
tain the desired state for the device in slot 1, and so on.
TABLE 6-8
Byte Bit
0
1 0
1
2
3 -7
and
SEND GLOBAL FLAGS
WRITE DEVICE SLOT STATUS
W D S S
RITE EVICE LOT TATUS
Bit Description
Operation code (10h)
No Error Flag for slot 0 (turn off device fault LED for slot 0)
Device Faulty Flag (turn on device fault LED for slot 0)
Rebuilding Flag (no action except bit is returned by READ DEVICE SLOT
STATUS command)
Not supported
Returns 00h
Returns either:
0 – no device inserted in slot
1 – device inserted in slot
Not supported
Returns either:
0-device power is off
(slot not prepared for operation)
1-device power is on
(slot prepared for operation)
Returns 00h
WRITE DEVICE SLOT STATUS
commands.
is set by the RAID controller or host since
Flag Bytes
Chapter 6 SAF-TE Command Implementation
,
6-9