Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!ut-sally!husc6!cmcl2!brl-adm!adm!rbj@icst-cmr.arpa From: rbj@icst-cmr.arpa (Root Boy Jim) Newsgroups: comp.unix.wizards Subject: Cant access disks on second UDA50 Message-ID: <8584@brl-adm.ARPA> Date: Fri, 31-Jul-87 11:36:47 EDT Article-I.D.: brl-adm.8584 Posted: Fri Jul 31 11:36:47 1987 Date-Received: Sat, 1-Aug-87 22:29:36 EDT Sender: news@brl-adm.ARPA Lines: 54 Close, but not quite. The correct config would be controller uda0 at uba0 csr 0172150 vector udintr disk ra0 at uda0 drive 0 disk ra1 at uda0 drive 1 controller uda1 at uba0 csr 0172550 vector udintr disk ra2 at uda1 drive 0 disk ra3 at uda1 drive 1 The config file defines a mapping between logical names (ra0) and physical names (uda0, drive 0). This mapping is essentially arbitrary. In order for another mapping (names in /dev to device numbers) to remain untouched by this experiment, it is important to maintain the names ra2 and ra3 for the two drives that were moved. Otherwise, the entries in /dev would need to be changed. There is no need to describe devices that do not exist, nor is there a need to reserve names for them. (Sometines, though, it is convenient to do so.) I will preface this remark by saying that I don't know RA's and UDA's from Proteon ring nets, but I do know something about disk drives. In my config file, we have the following: controller mba0 at nexus ? disk hp0 at mba0 drive 0 disk hp1 at mba0 drive 1 controller mba1 at nexus ? disk hp2 at mba1 drive 2 disk hp3 at mba1 drive 3 I see no reason why one must start numbering drives at zero. Whether or not this is true of UDA/RA devices I don't know. It is clear that the way he did it involves the least amount of switch diddling or unit number plug swapping. As to why it dies when you `sync' it, a possible explanation is that you are forcing I/O to *all* drives at once, something that may freak it out. -- Ed Gould mt Xinu, 2560 Ninth St., Berkeley, CA 94710 USA {ucbvax,decvax}!mtxinu!ed +1 415 644 0146 "A man of quality is not threatened by a woman of equality." A man of exclusive or is not threatened by a woman of greater than or equal to. (Root Boy) Jim Cottrell National Bureau of Standards Flamer's Hotline: (301) 975-5688 You mean you don't want to watch WRESTLING from ATLANTA? P.S. How about the SUPERBOWL from DALLAS?