VAX-VMS DSSI Notes:VAX-VMS DSSI Notes:Menu: Basic DSSI 3500 | Basic DSSI 4300 | DSSI based VAXcluster | KFMSA | KFQSA
+-----------------+ | uVAX-3500 | | CPU | +-----------------+ | Q-Bus Adapters | +---------------------+ | KFQSA +-------x-------x DSSI Bus #0 Devices x- DT/e | DSSI#0--+--DT/i | +---------------------+ | | | KZQSA +--A----x-ST/e +---------------------+ | SCSI#0--+--B----x-------x SCSI Bus #0 Devices x- ST/e | | +---------------------+ +-----------------+ Legend: DSSI#0 = Optional Q-Bus/DSSI Controller (KFQSA) SCSI#0 = Optional Q-Bus/SCSI Controller (KZQSA) DT/i = DSSI Bus Terminator Internal DT/e = DSSI Bus Terminator External ST/e = SCSI Bus Terminator External Notes: 1. every DSSI port must be connected to either a DSSI terminator or a DSSI cable which is connected to one or more DSSI devices with a termination at the end of the chain. 2. to the best of my knowledge, the internal DSSI terminators cannot be removed. 3. whether physically visible or not, there is always a terminator at each end of both DSSI and SCSI busses.
+-----------------+ | uVAX-4300 | +---------------------+ | CPU +-------x-------x DSSI Bus #0 Devices x- DT/e | DSSI#0--+--DT/i | +---------------------+ | | | DSSI#1--+--A----x-DT/e +---------------------+ | +--B----x-------x DSSI Bus #1 Devices x- DT/e | Internal Bus | +---------------------+ +-----------------+ | Q-Bus Adapters | +---------------------+ | KFQSA +-------x-------x DSSI Bus #2 Devices x- DT/e | DSSI#2--+--DT/i | +---------------------+ | | | KZQSA +--A----x-ST/e +---------------------+ | SCSI#0--+--B----x-------x SCSI Bus #0 Devices x- ST/e | | +---------------------+ +-----------------+ Legend: DSSI#0 = Embedded DSSI (SHAC) controller #0 DSSI#1 = Embedded DSSI (SHAC) controller #1 DSSI#2 = Optional Q-Bus/DSSI Controller (KFQSA) SCSI#0 = Optional Q-Bus/SCSI Controller (KZQSA) DT/i = DSSI Bus Terminator Internal DT/e = DSSI Bus Terminator External ST/e = SCSI Bus Terminator External Notes: 1. DSSI#1-A may connect to more DSSI Bus #1 devices, or to the DSSI bus of another CPU (if both CPUs are part of a VAXcluster) 2. every DSSI port must be connected to either a DSSI terminator or a DSSI cable which is coonected to one or more DSSI devices with a termination at the end of the chain. 3. to the best of my knowledge, the internal DSSI terminators cannot be removed. 4. Wether physically visible or not, there is always a terminator at each end of both DSSI and SCSI busses.
+----------+ +------+------+------+------+------+------+ +----------+ | CPU 0 | | RF72 | RF72 | RF71 | RF71 | RF71 | TF70 | | CPU 1 | | DSSI-0---+-+ A0 | A1 | A2 | A3 | A4 | A5 +-+---DSSI-0 | | | +------+------+------+------+------+------+ | | | | DS0 DS1 DS2 DS3 DS4 | | | | +------+------+------+------+------+ | | | DSSI-1---+-+ RF72 | RF72 | RF71 | RF71 | RF71 +--------+---DSSI-1 | | Internal | | B0 | B1 | B2 | B3 | B4 | | Internal | +----------+ +------+------+------+------+------+ +----------+ | Q-Bus | +------+------+------+------+------+------+ | Q-Bus | | | | RF71 | RF71 | RF71 | RF71 | RF71 | RF71 | | | | DSSI-2---+-+ C0 | C1 | C2 | C3 | C4 | C5 +-+---DSSI-2 | | | +------+------+------+------+------+------+ | | | | DS6 DS7 DS8 DS9 DS10 | | | | +------+------+------+------+------+------+ | | | DSSI-3---+-+ RF71 | RF71 | RF71 | RF71 | RF71 | RF71 +-+---DSSI-3 | | | | D0 | D1 | D2 | D3 | D4 | D5 | | | +----------+ +------+------+------+------+------+------+ +----------+ Legend: RF72 = 1 Gigabyte Hard Drive RF71 = 350 Megabyte Hard Drive TF70 = Cartridge Tape DS = Disk Shadow (example: DS0 is a shadow set volume composed of mirror disks A0 and B0. If one of the drives crash, the mate drive can carry on independently). This requires an optional "Shadow License". Notes: 1. A "Cluster License" must be installed in order for the CPUs to cooperate with each other in this configuration. 2. CPU-CPU communication can take place on either a shared ethernet or one of the DSSI busses.
+-+-- unused DSSI termination (parking) sockets | | V V +--------------------------------+ | x x | | x x | | x x | | | | x x | | x x Bus +-+---- DSSI termination sockets | x x Driver | | | | Chips V V | | +------+ | | | | x x | | | | x x | DSSI #0 (jack 1) connects here | | | x x | | +------+ | | +------+ | | | | x x | | | | x x | DSSI #1 (jack 2) connects here | | | x x | | +------+ | +--------------------------------+ Notes: 1. Make sure that the terminations are in the lower right position (some people are convinced that they are not required, this is false) 2. Diagnostic + Configuration programs (must boot VAX/DS) - EXSBA diagnostic supervisor - EVRAE online DSSI disk exerciser - EVMDA online DSSI tape exerciser - EVCXD repair level diagnostic - EVCXE ISE drive configuration (VAX-6000 series only) - EVCXF DSSI configuration and DUP diagnostic
+--------------------------------+ | xx | | xx | | xx | | xx | | xx | | xx | | xx | | | | | | +----+ | | |1234| Switch Pack | | +----+ | | | | | | | | | | | | | +--------------------------------+ Switches: 1 2 3 4 - - - - 1 x x x CSR addresses are read from EEPROM 0 1 0 0 CSR = 17774420 (a.k.a. service #0) 0 1 0 1 CSR = 17774424 (a.k.a. service #1) 0 1 1 0 CSR = 17774430 (a.k.a. service #2) 0 1 1 1 CSR = 17774434 (a.k.a. service #3) | | | +------ LSB | | +-------- MSB | | 0 0 0 0 CSR = 17760444 tape (secondary) 0 0 0 1 CSR = 17774500 tape (primary) 0 0 1 0 CSR = 17760334 disk (secondary) 0 0 1 1 CSR = 17772150 disk (primary) | | | +------ 1=primary 0=secondary | | +-------- 1=disk 0=tape | +---------- 1=fixed 0=floating +------------ 0=service 1=normal Notes: This adapter is programmable from the console as follows: 1. Set the adapter DIP switches to force the module into service mode and the CSR (Control + Status Register) base address into the fixed area. 2. Make sure the system console can see the module in service mode <sr> >>> <ur> sho qbus <sr> 772150 KDA50 (this MSCP adapter is the primary disk) 772140 TQK70 (this is a TK70 cartridge tape controller) 774420 KFQSA Service #0 (this DSSI adapter is in service mode #0) <sr> >>> 3. <ur> set host/uqssp/maintenance/service 0 <sr> UQSSP Controller (774420) Enter SET, CLEAR, SHOW, HELP, EXIT, or QUIT Node CSR Address Model 7 -------- KFQSA ------ <sr> ? <ur> set 0 760334 21 (DSSI id #0, secondary device, 21=disk) <sr> ? <ur> set 1 760340 21 (DSSI id #1, tertiary device, 21=disk) <sr> ? <ur> show <sr> UQSSP Controller (774420) Enter SET, CLEAR, SHOW, HELP, EXIT, or QUIT Node CSR Address Model 0 760334 21 1 760340 21 7 -------- KFQSA ------ <sr> ? <ur> exit <sr> Programming the KFQSA ... <sr> >>> 4. Now throw DIP switch #1 to put the adapter into normal mode 5. <sr> >>> <ur> sho qbus <sr> 772150 KDA50 (this MSCP adapter is the primary disk) 772140 TQK70 (this is a TK70 cartridge tape controller) 774420 KFQSA Service #0 (this DSSI adapter is in service mode #0) <sr> >>> Notes: in this example, 1. when the card is moved back to the non service position it will respond as if 3 KDA-50 disk adapters have been installed on the Q-Bus 2. the card is using DSSI id #7
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