Date: Mon, 11 Oct 93 09:17:01 EST From: Dwight McKay (The Moderator) Reply-To: Suns-at-Home@harbor.ecn.purdue.edu Subject: Suns-at-Home Digest V6 #32 To: Suns-at-Home-List Suns-at-Home Digest Mon, 11 Oct 93 Volume 6 : Issue 32 Today's Topics: 150M QIC Backup backup to 150M QIC tapes boot 4.1.3 (Sun 4/25) with no tranceiver attached? Can I modify an SLC to turn it into a GREEN MACHINE ? Help! My Hitachi HM-4119 19" monitor is very sick question +--------------------------------------------------------------------+ | Submissions: suns-at-home \ @harbor.ecn.purdue.edu | | Requests: suns-at-home-request > -- or -- | | Archives: suns-at-home-archives / ...rutgers!pur-ee!... | +--------------------------------------------------------------------+ ---------------------------------------------------------------------- Date: Mon, 4 Oct 93 14:33:20 EDT From: Vic.Tolomei@East.Sun.COM (Vic Tolomei - Sun NC Development) Subject: 150M QIC Backup To: gary@think.com For the many years that 150M QIC was in vogue, I did nightly backups of my personal stuff (and any system files I customized) using tar -- easier to get stuff off. Then monthly (or sooner) I did level 0 dumps. These were always done at night so it did not degrade my system. For dump, I used blocking 512, density 1000, size 1500, and it always worked just fine -- changed tapes at EOM and so on. Vic Tolomei ------------------------------ Date: Tue, 5 Oct 93 00:08:29 PDT From: perryh@pluto.rain.com (Perry Hutchison) Subject: backup to 150M QIC tapes To: gary@think.com > Date: Mon, 27 Sep 93 14:18:21 EDT > From: Gary Sabot > > How are the numbers that you give to dump derived from the actual numbers? > Is 140M the usable capacity of a 150M tape? You play with the numbers until you get the amount you want on the tape (or until you get a write error, indicating you've gone too far and need to back off some). > Also, if only a portion of a tape is used, can I start a second dump > if I use /dev/nrst0 and reduce the tape length arg to the next dump > call by the percentage of tape left, as reported by the previous dump? Yes, provided the next dump will fit entirely on the remaining tape (and in this case you need not bother to reduce the length argument as it will stop when it's finished anyway). Dump "does not support" multi-volume dumps unless each volume starts at the beginning of a tape. This implies that each volume except the last is a full tape. To avoid having to seek to the end of the already-recorded portion, you need to use /dev/nrst0 for writing each file on the tape except the last. > Finally, is dump the right thing to use for complete backups and for > incrementals? Yes. > Is there any way to get compress into the act so more fits on a tape? Yes, but you lose the multi-volume capability as it is impossible to predict in advance the amount of compression which can be achieved. It will also (usually) be MUCH slower, as most CPU's cannot compress fast enough to keep the drive streaming. ------------------------------ Date: Sat, 9 Oct 93 23:17:09 PDT From: Jonathan Thornburg Subject: boot 4.1.3 (Sun 4/25) with no tranceiver attached? To: suns-at-home@harbor.ecn.purdue.edu I am in the process of setting up a home Sun 4/25. I have been told that (at least) ScumOS 4.* won't boot multiuser without a transceiver "attached and doubly terminated". I'd like to avoid having to buy a tranceiver if I can. However, another Sun wizard has told me that all I need to do is (approximately) touch /etc/.UNCONFIGURED and the machine will boot and run just fine with nothing at all plugged into the network connector. Alas, he's uncertain of the details. My own browsing of /etc/rc.boot on another Sun confirms that /etc/.UNCONFIGURED is checked for in "interesting" ways when the network is being configured, but I'm not familiar enough with the boot process to be sure just what's going on here. My disk won't be here for another week, so I haven't actually made any experiments yet. Can someone who knows tell me the true situation and/or refer me to a suitable ScumOS manual for more info? Thanks 2^20, - Jonathan Thornburg ------------------------------ Date: Mon, 4 Oct 93 14:48:40 PDT From: levin@gdwest.gd.com (Barry Levin) Subject: Can I modify an SLC to turn it into a GREEN MACHINE ? To: Suns-at-Home@ecn.purdue.edu Can a Sun Sparc SLC workstation be modified to power down the monitor without powering down the CPU. As you know the SLC has the CPU board built into the monitor cabinet. I expect that there is some wire that can be switched between the power supply and the monitor to separately power down the monitor. Has anybody out there done this? Do I have to worry about putting spikes on the power supply to the cpu when separately powering on the monitor? Thanks, Barry Levin ( levin@gdwest.gd.com ) ------------------------------ Date: Wed, 6 Oct 93 06:06:53 +1000 From: craig@kralizec.zeta.org.au (Craig Dewick) Subject: Help! My Hitachi HM-4119 19" monitor is very sick To: Suns-at-Home@orchestra.ecn.purdue.edu WEll, yes, the subject line says it all. I originally posted the following article as news in several groups, but I'll put in the next digest as well in case some of you can help..... ------------------------------------------------------------------------------- > Newsgroups: kral.general,aus.computers,aus.sun-works,comp.sys.sun.hardware,comp.sys.sun.misc,alt.sys.sun > Subject: help! my Hitachi 19" monitor is sick > Date: 5 Oct 1993 07:03:33 +1000 Well folks, it's a sad story. I got home from work about half an hour ago, and went to switch on the monitor for the Sun. Instead of the usual thump sounds, I was greeted by smoke, flames, burning sounds and the acrid smeel of burnt electronics. Since I have had the monitor (I received it in May this year from the previous owner along with the 3/60 pizza box), it has exhibited a strange habit of loosing control of the image now and then, a problem which I have almost positively identified as heat-related since it only occurs about half an hour after powering up, and then at any time depending on whether the ambient temp is at the right level for the problem to occur. Seems to be a classis intermittent joint, but I can't locate it without documentation! The monitor still works now, except the the entire display is collapsed into a column thats still the right height, but only about 50 mm across. And from what I could tell, it's not simply a compressed screen image either, since it's got strange bands of grey in it that appear to me to 'oscillate' in some way. I have removed the main plastic cover, the top metal grille and the back plate, but even with all this removed I can't see what has been burnt. I don't feel that I should dismantle it any further in case I zap myself with stored EHT!! Besides, I have no idea where to look, since I don't have any documentation on the monitor at all. Sooooo. can anyone who has had this sort of trouble with the HM-4119 please let me know what they did. The damn thing is too big and heavy to ship off to get repaired, so I'd like to try and fix it myself. What advice can you offer? Thanks in advance.... Craig. ------------------------------------------------------------------------------- I posted a correction this morning, in that the display image is NOT the correct height at all, but the total height of the screen, but still collapsed into a column about 50 mm wide. It's as though both vertical sync and the horizontal deflectors have gone packing, but I'm not sure. Any help in either locating the fault and fixing it, or locating a service agent in Australia (preferably in SYdney, since this is where I live!) would be greatfully accepted. Thanks in advance.... Craig. ------------------------------ Date: Mon, 4 Oct 1993 11:24:03 -0700 From: James - The Keeper Subject: question To: suns-at-home@harbor.ecn.purdue.edu >I tried to add users on sun IPC (sunOs 4.1.3) with /usr/etc/install/add_user scr >ipt >(the syntax of add_user is: username uid gid "user full name" homedir shell) >when I choose Csh for shell for a new user and after logging in his/her >account the following message appears: Too many ('s Check your /lib/Cshrc and /lib/Login files. Those will be copied to user account as .login and .cshrc files when you use add_user. You also need to re-check those files in the users' home directory. ------------------------------ End of Suns-at-Home Digest ******************************