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- Xref: sparky vmsnet.misc:921 comp.sys.dec:5418 comp.os.vms:16431
- Path: sparky!uunet!destroyer!gatech!rutgers!spcvxb!terry
- From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.)
- Newsgroups: vmsnet.misc,comp.sys.dec,comp.os.vms
- Subject: Re: RQDXE switches for 3 RD drives
- Message-ID: <1992Oct12.170114.4096@spcvxb.spc.edu>
- Date: 12 Oct 92 21:01:14 GMT
- References: <1992Oct12.102348.214@cpvax.cpses.tu.com>
- Organization: St. Peter's College, US
- Lines: 20
-
- In article <1992Oct12.102348.214@cpvax.cpses.tu.com>, robert@cpvax.cpses.tu.com writes:
- > The default switch settings are used for RQDXE#1. There doesn't seem
- > to be any switches on any of the drives. (including RD54-D) What I
- > need is DIP switches for the second RQDXE.
-
- I've never seen two RQDXE's used in a chain. Doesn't mean it can't be done,
- though. Think of the RQDXE as a switch that steers individual drive selection
- to one or the other external connector. There are also some options for setting
- whether or not the connected devices are floppies or hard disks (had disks need
- ready/write protect support a little differently).
-
- So, you'd set the first RQDXE to send one drive select (likely DS3) to the
- CPU BA23's drive, and the other 3 (1, 2, and 4) to the second RQDXE. The second
- RQDXE will send DS4 to the BA23-C expander and route DS1 and DS2 off to the
- expansion box, but translated to DS3 and DS4 (you need this because the expan-
- der [RD5x-D] box only responds to DS3 and DS4).
-
- Terry Kennedy Operations Manager, Academic Computing
- terry@spcvxa.bitnet St. Peter's College, Jersey City, NJ USA
- terry@spcvxa.spc.edu +1 201 915 9381
-