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Article #151

Re: RQDXE switches for 3 RD drives

#151
From: Terry Kennedy, Operations Mgr.
Date: Mon, 12 Oct 1992 21:01
20 lines
1584 bytes
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
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Message-ID: <1992Oct12.170114.4096@spcvxb.spc.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!destroyer!gatech!rutgers!spcvxb!terry
References: <1992Oct12.102348.214@cpvax.cpses.tu.com>

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Path: arc1-ca.pugleaf.net!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