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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!ocvaxa.cc.oberlin.edu!CMATT
- From: CMATT@ocvaxa.cc.oberlin.edu (Matt Gilbert)
- Newsgroups: comp.os.vms
- Subject: DSSI mysteries explained
- Message-ID: <1FE2A23EDB9F002AB5@OBERLIN.BITNET>
- Date: 23 Jul 92 18:33:00 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 125
-
-
- Here is what I have learned from all you folks out there and from spending
- lots of time at the console prompt. The documentation that came with my
- KFMSA's and my DECarray (RF disks) was (as usual) pretty useless.
-
- A DSSI disk can be thought of as a single disk connected to a single HSC
- and served to it's host. This means that EACH DSSI disk (ISE) is an HSC and
- a disk. So, each ISE has it's own nodename (which must be unique), allocation
- class and a load of other parameters. All DSSI disks show up as device
- DIAxxx no matter how many DSSI controllers you have or how they are hooked up.
-
- The parameters you will be most interested in setting will be:
- allclass - allocation class (should match the host VAX's)
- unitnum - the device's unit number (ie. $1$DIAxxx)
- forceuni - set to 0 if you have changed unitnum
- nodename - any alphanumeric string up to 8 characters
-
- Each KFMSA has two I/O paths (bus 1, bus 2). It is very important that you
- know which disk is on which bus. It is also very important that you know
- which XMI slot your KFMSA is in as well. You need all this information in
- order to tell your 6000 how to boot:
-
- BOOT /XMI:A /DSSI_NODE:0 /PORT:1 DI0
-
- Here we see that we want to boot from a KFMSA in XMI slot A on DSSI_NODE 0
- (more about that in a minute) PORT (more like BUS) 1 device DI0.
-
- We can find the XMI slot out by doing a show config at the console prompt
- or by looking in the XMI card cage.
- >>> SHOW CONFIG
- Type Rev
- 1+ KA66A (8087) 0005
- 2+ KA66A (8087) 0005
- 9+ MS65A (4001) 0084
- A+ KFMSA (0810) A4A6
- B+ KFMSA (0810) A4A6
- C+ KDM70 (0C22) 1911
- E+ DEMNA (0C03) 0802
-
- In my particular case you will notice 2 KFMSA's one at XMI slot A and another
- at slot B. You can now see that it is very important for you to have a good
- understanding of how your DSSI drives/controllers are configured. Don't just
- let DEC hook them up and then forget about it. The best method of seeing how
- things are hooked up is by running diags. Specfically the autosizer and then
- the DSSI configuration program called EVCXF (this program is only available
- on the complete diagnostic kit, not the customer diags - get it from DEC and
- make sure you put a copy of it on your system, it is one of those mandatory
- type of programs that DEC should have given us in the first place). This
- program is also used to configure your ISE parameters. Output is show below
-
- DSSI sizing underway, please wait...
-
-
- XMI node 0A XMI node 0A XMI node 0B XMI node 0B
- DSSI ID Bus 1/UUN Bus 2/UUN Bus 1/UUN Bus 2/UUN
- 0 RF35 1 ***** RF35 9 *****
- 1 RF35 2 RF73 7 RF35 10 *****
- 2 RF35 3 ***** RF35 11 *****
- 3 RF35 4 ***** RF35 12 *****
- 4 RF35 5 RF73 8 RF35 13 *****
- 5 RF35 6 ***** RF35 14 *****
- 6 ***** ***** ***** *****
- 7 KFMSA KFMSA KFMSA KFMSA
-
-
- The DSSI ID column is directly related to the DSSI_NODE qualifier of the
- boot command. So from the above boot command you can see the following:
-
- I booted a disk at DSSI ID 0 (/DSSI_NODE:1), BUS 1 (/PORT:1) and XMI
- slot A. Using this info, you can see from the chart above that I booted
- an RF35 UUN 1.
-
- NOTE: the above chart is the HARDWARE configuration in your machine, the
- UUN is not the unitnum params but simply some number that increments as you
- add devices. The unitnum, nodename, allclass is not shown here at all.
-
- I would highly suggest that you label all your cables and all your drives
- in your DECarray cabinet (a good idea at any time). The posibility of not
- knowing exactly which physical drive is which VMS device is very likely when
- you have 12 disks in the space of one RA90 and there are only two cables
- going to them all.
-
- On the VMS side, set your sysgen parameter ALLOCLASS the same as your
- allclass on your ISE's. Also keep an eye on PANUMPOLL and PAMAXPORT even
- if you don't have a CI. VMS thinks these nodes/devices are coming in over
- a CI (or at least that is the impression I get) because if you change these
- params, you can make devices disappear (trust me on this one, I know this
- from experience - it took me 2 days to find them again).
-
- And the fruits of this labor:
-
- $ show dev d
-
- Device Device Error Volume Free Trans Mnt
- Name Status Count Label Blocks Count Cnt
- $1$DIA0: (ISEA1A) Mounted 0 VAXVMSV055 684837 139 1
- $1$DIA1: (ISEA1B) Online 0
- $1$DIA2: (ISEA1C) Online 0
- $1$DIA3: (ISEA1D) Online 0
- $1$DIA4: (ISEA1E) Online 0
- $1$DIA5: (ISEA1F) Online 0
- $1$DIA6: (ISEB1A) Online 0
- $1$DIA7: (ISEB1B) Online 0
- $1$DIA8: (ISEB1C) Online 0
- $1$DIA9: (ISEB1D) Online 0
- $1$DIA10: (ISEB1E) Online 0
- $1$DIA11: (ISEB1F) Online 0
- $1$DIA13: (ISEA2B) Online 0
- $1$DIA15: (ISEA2D) Online 0
-
- You might also notice that the node names I chose are 6 characters (old
- habits) and in the form ISEabc
- where a = the XMI slot of the KFMSA
- b = is the bus they are on (1 or 2)
- c = is what device on the bus (A=1st,B=2nd, so on)
-
- I don't know if this is going to help me any but it seemed logical and
- lends to unique nodenames.
-
- Thanks for all the help
-
- Matt Gilbert
- Oberlin College
-
-
-