Cache device data section

There is one section per device.

Offsets		Name	Length	Format	Description
0	0	R745DVOL	6	EBCDIC	Volume serial of device.
6	6	R745DFL4	1	binary	Flags Bit Meaning when set 0 4-digit device address. 1-7 Reserved.
7	7	R745DCID	1	EBCDIC	Real control unit type code.
7	7	R745DCCU	1	EBCDIC	Configured control unit type code if R745CMDL = 1.
8	8	R745DUNT	3	binary	Unit address for sense command.
11	B		1		Reserved.
12	C	R745DEVN	2	binary	Device number.
14	E		2		Reserved.
16	10	R745DFLG	1	binary	Flags Bit Meaning when set 0 Subsystem storage not available. 1-3 Reserved. 4-7 Format of data returned: B'0000' = 40 bytes sense. B'1111' = 44 bytes sense.
17	11	R745DVID	1	binary	Device address.
18	12	R745DVS1	1	binary	Addressed device status flag # 1: Bit Meaning 0-1 Device caching status: B'00' = Caching activated. B'01' = Not used. B'10' = Deactivate pending. B'11' = Caching deactivated. 2-3 DASD fast write device status: B'00' = DFW allowed B'01' = DFW not used B'10' = DFW deactivate pending B'11' = DFW deactivate 4 Primary of duplex pair. 5 Secondary of duplex pair. 6-7 Duplex pair status: B'00' = Duplex pair available. B'01' = Duplex pair pending. B'10' = Failed duplex primary. B'11' = Failed duplex not primary.
19	13	R745DVS2	1	binary	Addressed device status flag # 2. Bit Meaning 0 Device is failed duplex. 1 Pinned data exits for device. 2-7 Other device in duplex pair.
20	14	R745DRCR	4	s_float	Search read caching requests.
24	18	R745DCRH	4	s_float	Search read caching hits.
28	1C	R745DWRC	4	s_float	Write caching requests.
32	20	R745DWCH	4	s_float	Write caching request hits.
36	24	R745DRSR	4	s_float	Read sequential requests.
40	28	R745DRSH	4	s_float	Read sequential request hits.
44	2C	R745DWSR	4	s_float	Write sequential requests.
48	30	R745DWSH	4	s_float	Write sequential request hits.
52	34	R745DRNR	4	s_float	Search read non-retentive requests.
56	38	R745DNRH	4	s_float	Search read non-retentive request hits.
60	3C	R745DWNR	4	s_float	Write non-retentive requests.
64	40	R745DWNH	4	s_float	Write non-retentive hits.
68	44	R745DICL	4	s_float	Inhibit cache load requests.
72	48	R745DBCR	4	s_float	Bypass cache requests.
76	4C	R745DTC	4	s_float	Sequential DASD to cache XFRs.
80	50	R745DNTD	4	s_float	Normal cache requests DASD to cache XFRs.
84	54	R745DCTD	4	s_float	Cache to DASD XFRs.
88	58	R745DFWB	4	s_float.	Fast write bypass count.
92	5C	R745DFWC	4	s_float	Fast write caching requests.
96	60	R745DFWS	4	s_float	Fast write sequential requests.
100	64	R745DCRM	4	s_float	Record cache read misses.
104	68	R745DSG2	1	binary	Device status group 2. Bit Meaning 0-1 Record cache optimization level: B'00' = Full adapt rec cache B'01' = Adapt rec. cache writes B'10' = Rec cache on def ext B'11' = Track mode 2 Data exits in failed NVS. 3 Defective battery, destage pending. 4-5 Volume state: B'00' = Non spare. B'01' = Reserved. B'10' = Spare. B'11' = Broken spare. 6-7 Pinned data: B'00' = No pinned data and FW. B'01' = Pinned data and not FW suspend. B'10' = Reserved. B'11' = Pinned data and FW suspend.
105	69	R745INCR	1	binary	Status code. 0 Transfer statistics not valid. 1 Transfer statistics valid. Bytes in units of 128K. Times in units of 16 milliseconds.
106	6A	R745DSID	2	binary	Subsystem ID.
108	6C	R745DCWP	4	s_float	RCD cache write promotions.
112	70	R745DKDW	4	s_float	CKD writes, collected for 3990-03/06 and 2105.
116	74	R745DKDH	4	s_float	CKD write hits, collected for 3990-03/06 and 2105.
120	78	R745DFWR	4	s_float	CFW bypass, collected for 3990-03/06 and 2105.
124	7C	R745BYTR	4	s_float	Bytes read. See R745INCR.
128	80	R745BYTW	4	s_float	Bytes written. See R745INCR.
132	84	R745RTIR	4	s_float	Response time to read bytes. See R745INCR.
136	88	R745RTIW	4	s_float	Response time to write bytes. See R745INCR.