Device Data Section

This section contains one per device.

Offsets		Name	Length	Format	Description
0	0	R799NUM	2	packed	Device number.
2	2	R799LCU	2	binary	Logical control unit number X'00' to X'FF'.
4	4		1		Reserved.
5	5	R799CNF	1	binary	Device flags Bit Meaning when set 0 IOS queue-length incorrect 1 No logical control unit information 2 Data contained in fields R799SSC through R799DIS is incorrect 3 Connect, pending, or disconnect time for device is not valid 4-5 Reserved 6 Device was reconfigured or DDR activity was detected through Monitor I interval 7 Device is currently online.
6	6	R799SER	6	EBCDIC	Volume serial number of the volume mounted on this device.
12	C	R799TYP	4	binary	Device type.
16	10	R799NUX	4	binary	Number of base and alias devices for a parallel access volume (PAV). This field is 1 for a non-PAV device. For HyperPAV base devices (bit 6 of R799CNX is set), this is the accumulated number of HyperPAV aliases.
20	14	R799SSC	4	binary	Start subchannel (SSCH) count.
24	18	R799MEC	4	binary	Measurement event count; number of SSCH instructions for which connect, pending, and active times were stored.
28	1C	R799CNN	4	binary	Device connect time.
32	20	R799PEN	4	binary	Function pending time.
36	24	R799ATV	4	binary	Function active time.
40	28	R799DIS	4	binary	Device disconnect time.
44	2C	R799QUE	4	binary	Number of requests queued in IOS for this device.
48	30	R799UTL	4	binary	Number of samples when the device was reserved but an SSCH had not been issued to the device.
52	34	R799RSV	4	binary	Number of samples taken during the measurement interval that indicated that the device was reserved.
56	38		4		Reserved.
60	3C	R799ALC	4	binary	Number of samples taken during the measurement interval that indicated that the device was allocated.
64	40	R799DVB	4	binary	Device busy delay time.
68	44	R799CUB	4	binary	Shows control unit busy delay time if bit 4 in R799CNX is set off.
72	48	R799ICT	2	binary	Incorrect sample count.
74	4A	R799CNX	1	binary	Device flag extensions. Bit Meaning when set 0 Base exposure of a parallel access volume 1 Number of alias exposures has changed 2 Timing facility not active 3 Extended CMB mode 4 Model-dependant data not available by STSCH 5 Initial command response time available 6 HyperPAV base device. 7 Interrupt-Delay-Time facility is provided by channel subsystem.
75	4B		1		Reserved.
76	4C	R799SGN	8	EBCDIC	Storage group name.
84	54	R799NDA	4	binary	Total number of allocations in effect for the device.
88	58	R799DPB	4	binary	Shows the amount of time during the measurement interval that I/O requests to a device were delayed because a director port was busy if bit 4 of R799CNX is set off.
92	5C	R799CMR	4	unsigned binary	Shows initial command response time in units of 128 microseconds if bit 5 of R799CNX is set on.
96	60	R799PCT	4	binary	Number of unsuccessful PAV samples.
100	64	R799PSM	4	binary	Number of successful PAV samples.
104	68	R799IDT	4	binary	Interrupt delay time in units of 128 microseconds. This field is zero if not supported by the hardware.
108	6C	R799CUQ	4	binary	Control Unit Queuing Time.
112	70	R799CN2	1	binary	Device flag extension 2 Bit Meaning when set 0 Device connected to FICON®.
113	71	R799SCS	1	binary	Subchannel set ID.
114	72	R799NM2	2	binary	Device number (same as R799NUM).