INFO-VAX Fri, 12 Sep 2008 Volume 2008 : Issue 501 Contents: Re: Current status? Re: Current status? Re: I don't have "type /tail=[n]" or "type /continuous" what do I Re: Intermittent RWSCS state Re: Intermittent RWSCS state Re: OT: The end of the world in roughly 3 hours Re: OT: The end of the world in roughly 3 hours Re: OT: The end of the world in roughly 3 hours Re: OT: The end of the world in roughly 3 hours SCSI controller question Re: SCSI controller question Re: SDLT versus LTO tape backup Re: SDLT versus LTO tape backup Re: SDLT versus LTO tape backup Re: SDLT versus LTO tape backup Re: SDLT versus LTO tape backup Re: SDLT versus LTO tape backup Re: smiserver Re: smiserver Re: Spinning down an old disk array Re: Spinning down an old disk array ---------------------------------------------------------------------- Date: 12 Sep 2008 13:11:43 GMT From: billg999@cs.uofs.edu (Bill Gunshannon) Subject: Re: Current status? Message-ID: <6iv84fFma4eU1@mid.individual.net> In article , Johnny Billquist writes: > Bill Gunshannon skrev: >> In article , >> John Santos writes: >>> Bill Gunshannon wrote: >>> I'm on Verizon FIOS at home and I know the FIOS converter box >>> is a router and does NAT and some level of filtering, so inbound >>> port 25 traffic wouldn't make it to my LAN (or single computer >>> if that was all I had) unless I actively reconfigure it to pass >>> port 25 to a designated host (the default is "block"), but I >>> don't know if the same applies to Comcast cable modems. (FIOS >>> is point-to-point to the central office, like DSL, so local >>> "LAN" traffic isn't a separate issue like it would be with >>> Comcast.) In other words, blocking at the upstream router or >>> at my home would be equally effective with FIOS or DSL, but >>> for Comcast, only blocking at the home would catch everything. >> >> Inbound port 25 to your machine is not the source of SPAM, outbound >> from your machine, which has no business sending email to anyone but >> your local MTA for relaying, to the INTERNET in general is. It doesn't >> require blocking at the user level, just at the border of the email domain >> which is your ISP. > > Just thought I'd throw in a torch here, and then I'll be quiet again. > > I just totally hate ISPs that block port 25. The less I have to deal with an > ISP, the better my life works. They are *clowns* and I for one am not interested > in letting them handling my mail traffic if I can avoid it. If you are a residential customer: 1. You probably don't have a clue what ahy of this means. 2. You have no need to run your own mail server. 3. Your AUP (at least for every ISP in the US who's AUP I am familiar with) prohibits you from running an servers. So why would you need access to port 25? If you have commercial network service, nothing should be blocked, but you should be held to a much higher standard of maintenance. > > Spam is definitely a scurge, but letting the ISPs get monopoly on mail is not > the solution. It's not giving them a monopoly. Anyone who wants to run servers merely needs a commercial and not a residential service agreement. > > And as others have pointed out, the fact that a whole bunch of ISPs now block > port 25 haven't reduced spam one bit. Actually, the number who do is insignificant. Most of the major ISP's in the US do not. And probably don't even know what we are talking about. > Don't kill the messenger when the message > is junk. Find the originator instead. That's where your problem is, and that is > where you need to apply the fix. Otherwise the spammer will just continue, > finding new ways of spreading their junk. I can virtually eliminate SPAM. All I need is to get people to expend what will turn out to be considerably less effort nt the long run than what thye are epending now on the problem. > > Jail them. Confiscate their money and their business. That would stop spam. Not > much else will. That comes back to my statement that we need a social solution and not a technological solution. Under the way the INTERNET is currently run, this can not be done. Under my plan, it most certainly could. > > People who think that blocking ports is a solution to the spam problem are just > plain ignorant. Blocking port 25 is just a bandaid, but the only one we have available right now. It would have an immediate effect, if it were truly universal. But the solution needs to be social and that solution exists today and could easily be improved upon once people actually looked at the problem and the solution with un-biased eyes. > > Thank you for your time. I now let you go back to your spamming. :-) Always good to hear from you. bill -- Bill Gunshannon | de-moc-ra-cy (di mok' ra see) n. Three wolves billg999@cs.scranton.edu | and a sheep voting on what's for dinner. University of Scranton | Scranton, Pennsylvania | #include ------------------------------ Date: Fri, 12 Sep 2008 08:14:15 -0500 (CDT) From: sms@antinode.info (Steven M. Schweda) Subject: Re: Current status? Message-ID: <08091208141518_20202860@antinode.info> From: billg999@cs.uofs.edu (Bill Gunshannon) > If you are a residential customer: > 1. You probably don't have a clue what ahy of this means. > 2. You have no need to run your own mail server. > 3. Your AUP (at least for every ISP in the US who's AUP I am familiar > with) prohibits you from running an servers. I don't wish to divert yet another unproductive discussion, but when I was looking for an ISP for my residence (1999), I asked the candidates about servers. I chose one whose (or "who's", if you're illiterate) response was, "We don't care what you run." They've been quite satisfactory ever since. ------------------------------------------------------------------------ Steven M. Schweda sms@antinode-info 382 South Warwick Street (+1) 651-699-9818 Saint Paul MN 55105-2547 ------------------------------ Date: 12 Sep 2008 07:35:28 -0500 From: koehler@eisner.nospam.encompasserve.org (Bob Koehler) Subject: Re: I don't have "type /tail=[n]" or "type /continuous" what do I Message-ID: <96I7qO36YLI8@eisner.encompasserve.org> In article , "Richard B. Gilbert" writes: > > Then you need to describe your system in far greater detail. I forget > just when TYPE /TAIL was implemented but it has been around for a LONG > time. Maybe as far back as V5.5-2 and certainly by 6.2. I think it was 6.0. My 5.5-2 systems certinaly don't have it. ------------------------------ Date: Fri, 12 Sep 2008 09:32:09 +0200 From: Johnny Billquist Subject: Re: Intermittent RWSCS state Message-ID: Marty Kuhrt skrev: > John Santos wrote: >> norm.raphael@metso.com wrote: >>> >>> Marty Kuhrt wrote on 09/09/2008 12:38:20 PM: >>> >>> > Since the VAX in OP's question is probably only talking to the >>> cluster >>> > via its 10M network cable, it might be as simple as a that. >>> No such luck. Talking on FDDI for SCS traffic. 10MB network for other. >> >> Are you certain? IIRC, the default cluster configuration is to enable >> all >> SCS-capable circuits, and normally all the traffic would end up on the >> fastest one (FDDI), but if there was a momentary failure or excessive >> congestion on the FDDI, it might have failed over to the ethernet, thus >> hitting the VAX's 10Mb bottleneck, and then never failed back. I >> think the show cluster circuit counters should reveal if this has >> happened. (I think the 2nd example shows circuit counters by circuit, >> but not circuit names, so I can't tell which is which, though possibly a >> cluster expert could.) >> >> There is a way to force it to use *only* the FDDI, and I think there's >> a way to force to fail back to FDDI if for some reason it has failed >> over to the Ethernet. >> >> HTH. > > Now that I think on it, was there a FDDI interconnect for VAXen? I > vaguely remember that Nemonix was making an after market one, but I > don't remember a "native" one. Of course, that doesn't mean too much, > since I occasionally forget I have my glasses on my head. ;^) There was atleast one FDDI controller for the Q-bus from DEC. Can't remember the name of it. (I wonder if anyone every tried using that on a PDP-11... :-) ) Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt@softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol ------------------------------ Date: Fri, 12 Sep 2008 08:00:15 GMT From: John Santos Subject: Re: Intermittent RWSCS state Message-ID: Michael Moroney wrote: > Marty Kuhrt writes: > > >>Now that I think on it, was there a FDDI interconnect for VAXen? I >>vaguely remember that Nemonix was making an after market one, but I >>don't remember a "native" one. Of course, that doesn't mean too much, >>since I occasionally forget I have my glasses on my head. ;^) > > > Here's an oddball. > > Around 1990, there was actually an FDDI interconnect being developed that > sat on a SCSI bus, intended for VAXstation 3100 series systems. My > baptism by fire in VMS drivers was to write a driver for this thing! I > got it to run in a LAN Cluster, and shortly thereafter the project was > cancelled. One of my customers had some VAX 6000-series systems with FDDI, (XMI-based I think, not BI), so it was definitely real and supported. -- John Santos Evans Griffiths & Hart, Inc. 781-861-0670 ext 539 ------------------------------ Date: Fri, 12 Sep 2008 10:50:34 GMT From: VAXman- @SendSpamHere.ORG Subject: Re: OT: The end of the world in roughly 3 hours Message-ID: <00A7F82C.51930A49@SendSpamHere.ORG> In article , BRAD@rabbit.turquoisewitch.com (Brad Hamilton) writes: >In article <48c79086$0$12394$c3e8da3@news.astraweb.com>, JF Mezei wrote: >[...] >>So what they have done today is what I used to do at the montreal >>velodrome (before it was savagely destroyed by politicians): go round >>and round hopefully without a collision... > >I wonder what would happen in the Velodrome if they introduced a Lance >Armstrong going round and round in the opposite direction, and the two of you >collided? The Super Lance Armstrong Collider! Damn... that acronym is already taken! -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)COM ... pejorative statements of opinion are entitled to constitutional protection no matter how extreme, vituperous, or vigorously expressed they may be. (NJSC) Copr. 2008 Brian Schenkenberger. Publication of _this_ usenet article outside of usenet _must_ include its contents in its entirety including this copyright notice, disclaimer and quotations. ------------------------------ Date: Fri, 12 Sep 2008 07:34:56 -0400 From: "Ken Robinson" Subject: Re: OT: The end of the world in roughly 3 hours Message-ID: <7dd80f60809120434n23d0c1bfu3df6a2e9a6b95e5b@mail.gmail.com> See this site: http://hasthelargehadroncolliderdestroyedtheworldyet.com/ Ken ------------------------------ Date: Fri, 12 Sep 2008 04:42:16 -0700 (PDT) From: Galen Subject: Re: OT: The end of the world in roughly 3 hours Message-ID: <8d96421c-c71d-47bd-8be6-d3386d0998da@t54g2000hsg.googlegroups.com> > > If my execution becomes necessary please stand me up at the LHC and > pull the trigger... Hmm. If they actually did this to me, maybe I would become the stuff from which the new (or present?) universe were created? We are such stuff as universes are made of... (Apologies to W.S.) ------------------------------ Date: Fri, 12 Sep 2008 10:01:08 -0700 (PDT) From: AEF Subject: Re: OT: The end of the world in roughly 3 hours Message-ID: On Sep 10, 5:53 am, Michael Kraemer wrote: > JF Mezei schrieb: > > > > > BTW: > > > $ curl -Ihttp://www.cern.ch > > HTTP/1.1 302 Found > > Date: Wed, 10 Sep 2008 09:11:05 GMT > > Server: Microsoft-IIS/6.0 > > X-Powered-By: ASP.NET > > X-AspNet-Version: 1.1.4322 > > Location:http://public.web.cern.ch/public/ > > Cache-Control: private > > Content-Type: text/html; charset=utf-8 > > Content-Length: 150 > > > And I thought CERN was populated by intelligent and educated people who > > would know not to use microsoft products. That's just their website. They're probably using Linux to analyze the data, but I don't know for sure. > > well, being cynical, one could ask: > And these are the same people telling us > there would be absolutely no problems with > black holes ? > :-) See Brian Greene's Op-ed article in today's NY Times for the answer. Hint: It has to do with cosmic rays. (You might need to register.) http://www.nytimes.com/2008/09/12/opinion/12greene.html?_r=1&ref=opinion&oref=slogin AEF ------------------------------ Date: Fri, 12 Sep 2008 07:35:55 -0700 (PDT) From: H Vlems Subject: SCSI controller question Message-ID: <72215e3f-9b4c-4fd6-a41f-172f94de565f@p25g2000hsf.googlegroups.com> What is the difference between a KZPCM-DA and a KZPCM-DX? Hans ------------------------------ Date: Fri, 12 Sep 2008 10:02:11 -0500 (CDT) From: sms@antinode.info (Steven M. Schweda) Subject: Re: SCSI controller question Message-ID: <08091210021135_20202860@antinode.info> From: H Vlems > What is the difference between a KZPCM-DA and a KZPCM-DX? I believe that -%A is factory-installed, -%X is field-installed. ------------------------------------------------------------------------ Steven M. Schweda sms@antinode-info 382 South Warwick Street (+1) 651-699-9818 Saint Paul MN 55105-2547 ------------------------------ Date: 12 Sep 2008 09:04:14 +0100 From: pmoreau@ath.cena.fr (Patrick MOREAU, DTI Athis ex CENA, Tel: 01.69.57.68.40) Subject: Re: SDLT versus LTO tape backup Message-ID: <87+$r0izmJF7@sinead> In article , Alan Frisbie writes: > I have been a happy user of DLT/SDLT tapes for many years. > One of my sites is currently using SDLT 160/320, but the > backups are now taking two tapes and they want to upgrade. > > The next logical step up is SDLT 300/600 (SDLT-II tapes), > but I want to consider other options. One option is the > LTO-3 (400 GB / 800 GB) drive. > > I would to know your opinions on these two options, plus > any others you might be using. I hear some people saying > that SDLT is dead and the future is LTO, but other disagree. [...] We use an Overland robotic with 24 SDLT 160/320 tapes and two SDLT drives. Runs very well. But you need a software to drive the thing, and it's rather expensive. (the server is under Solaris, not VMS sorry ...). LTO-3 is rather tempting, the storage capacity is now better than DSLT one. Patrick -- =============================================================================== patrick.moreau@aviation-civile.gouv.fr DSNA/DTI/EOS (ex SDER/CENA) ______ ___ _ Pôle XPE / / / / /| /| Athis-Mons France / /___/ / / | / | __ __ __ __ BP 205 / / / / |/ | | | |__| |__ |__| | | 94542 ORLY AEROGARE CEDEX / / :: / / | |__| | \ |__ | | |__| http://www.ath.cena.fr/~pmoreau/ http://membres.lycos.fr/pmoreau/ =============================================================================== ------------------------------ Date: Fri, 12 Sep 2008 04:51:39 -0700 (PDT) From: Rob Subject: Re: SDLT versus LTO tape backup Message-ID: On Sep 11, 8:02=A0pm, Alan Frisbie wrote: > I have been a happy user of DLT/SDLT tapes for many years. > One of my sites is currently using SDLT 160/320, but the > backups are now taking two tapes and they want to upgrade. > > The next logical step up is SDLT 300/600 (SDLT-II tapes), > but I want to consider other options. =A0 One option is the > LTO-3 (400 GB / 800 GB) drive. > > I would to know your opinions on these two options, plus > any others you might be using. =A0 I hear some people saying > that SDLT is dead and the future is LTO, but other disagree. > > What do *YOU* use for your most valuable data, and why? > > Thanks, > Alan Frisbie We went from DLT4 to SDLT to LTO3. LTO3 has certainly been the most stable, with only one drive swap so far. You can also mix SDLT and LTO in a MSL6000 library, although I believe LTO3 will also read-only SDLT. Please check these facts on the HP support matrix. One thing you should bear in mind is if you don't feed the LTO drive quickly enough, you may see porrer performance than the SDLT. We upgraded from a HSG SAN to an EVA8000, so there are no data bottlenecks anywhere. Rob. ------------------------------ Date: 12 Sep 2008 07:39:00 -0500 From: koehler@eisner.nospam.encompasserve.org (Bob Koehler) Subject: Re: SDLT versus LTO tape backup Message-ID: In article , Alan Frisbie writes: > I have been a happy user of DLT/SDLT tapes for many years. > One of my sites is currently using SDLT 160/320, but the > backups are now taking two tapes and they want to upgrade. > > The next logical step up is SDLT 300/600 (SDLT-II tapes), > but I want to consider other options. One option is the > LTO-3 (400 GB / 800 GB) drive. > > I would to know your opinions on these two options, plus > any others you might be using. I hear some people saying > that SDLT is dead and the future is LTO, but other disagree. > > What do *YOU* use for your most valuable data, and why? 4mm DDS-1. I know some people have had problems with DDS, but I haven't. ANd if it takes two tapes, then I load a second tape. ------------------------------ Date: Fri, 12 Sep 2008 07:07:31 -0700 (PDT) From: DaveG Subject: Re: SDLT versus LTO tape backup Message-ID: <814b168b-2d90-43e2-8f16-f3b030ce86ff@b1g2000hsg.googlegroups.com> For those that may not have run into this writeup on DLT: http://en.wikipedia.org/wiki/Digital_Linear_Tape ------------------------------ Date: Fri, 12 Sep 2008 09:57:40 -0700 (PDT) From: BaxterD@tessco.com Subject: Re: SDLT versus LTO tape backup Message-ID: On Sep 12, 10:07=A0am, DaveG wrote: > For those that may not have run into this writeup on DLT: > > http://en.wikipedia.org/wiki/Digital_Linear_Tape I switched from DLT4 to LTO3 about 3 months ago, and the performance is great. Backup times were reduced by 50%. Only bad comment is that we have had an issue with the loader being unable to extract a tape cassette from a given slot and load it into a drive. HP says it is a known problem however thsy are unable to offer any real solution except to "exercise" the cassettes manually, (i.e. insert and remove the cassette a few times) before finally inserting it into the library. Although it seems cluedgy, since we started doing this we have had no reoccurrence of the problem (touch wood), which previously was happening approximately once each week, and coincidentally, always in the same slot (although we don't use that many of our slots). Finally, it seems that the exercising doesnt necessarily have to be done in the slot the tape is destined for, it can be done in the mail slot. Even if it is subsequently move to an internal slot, the problem doesn't seem to occur after applying the HP solution. Dave ------------------------------ Date: Fri, 12 Sep 2008 13:09:42 -0400 From: norm.raphael@metso.com Subject: Re: SDLT versus LTO tape backup Message-ID: This is a multipart message in MIME format. --=_alternative 005E4476852574C2_= Content-Type: text/plain; charset="US-ASCII" BaxterD@tessco.com wrote on 09/12/2008 12:57:40 PM: > On Sep 12, 10:07 am, DaveG wrote: > > For those that may not have run into this writeup on DLT: > > > > http://en.wikipedia.org/wiki/Digital_Linear_Tape > > I switched from DLT4 to LTO3 about 3 months ago, and the performance > is great. Backup times were reduced by 50%. Only bad comment is > that we have had an issue with the loader being unable to extract a > tape cassette from a given slot and load it into a drive. HP says > it is a known problem however thsy are unable to offer any real > solution except to "exercise" the cassettes manually, (i.e. insert and > remove the cassette a few times) before finally inserting it into the > library. > > Although it seems cluedgy, since we started doing this we have had no > reoccurrence of the problem (touch wood), which previously was > happening approximately once each week, and coincidentally, always in > the same slot (although we don't use that many of our slots). > Finally, it seems that the exercising doesnt necessarily have to be > done in the slot the tape is destined for, it can be done in the mail > slot. Even if it is subsequently move to an internal slot, the > problem doesn't seem to occur after applying the HP solution. > > Dave What is capacity of LTO3 vs DLT4? What is media cost per cartridge? What is media cost (approx) per gigabyte? Is the 50% due to drive transfer rate or media density or combo or ? --=_alternative 005E4476852574C2_= Content-Type: text/html; charset="US-ASCII"
BaxterD@tessco.com wrote on 09/12/2008 12:57:40 PM:

> On Sep 12, 10:07 am, DaveG <david.gudew...@abbott.com> wrote:
> > For those that may not have run into this writeup on DLT:
> >
> > http://en.wikipedia.org/wiki/Digital_Linear_Tape
>
> I switched from DLT4 to LTO3 about 3 months ago, and the performance
> is great.    Backup times were reduced by 50%.   Only bad comment is
> that we have had an issue with the loader being unable to extract a
> tape cassette from a given slot and load it into a drive.    HP says
> it is a known problem however thsy are unable to offer any real
> solution except to "exercise" the cassettes manually, (i.e. insert and
> remove the cassette a few times) before finally inserting it into the
> library.
>
> Although it seems cluedgy, since we started doing this we have had no
> reoccurrence of the problem (touch wood), which previously was
> happening approximately once each week, and coincidentally, always in
> the same slot (although we don't use that many of our slots).
> Finally, it seems that the exercising doesnt necessarily have to be
> done in the slot the tape is destined for, it can be done in the mail
> slot.   Even if it is subsequently move to an internal slot, the
> problem doesn't seem to occur after applying the HP solution.
>
> Dave
What is capacity of LTO3 vs DLT4?
What is media cost per cartridge?
What is media cost (approx) per gigabyte?

Is the 50% due to drive transfer rate or media density or combo or ? --=_alternative 005E4476852574C2_=-- ------------------------------ Date: Fri, 12 Sep 2008 10:48:19 GMT From: VAXman- @SendSpamHere.ORG Subject: Re: smiserver Message-ID: <00A7F82C.01812F79@SendSpamHere.ORG> In article , "Tom Linden" writes: >I have been trying to bring up a tape lib attached thru and MDR >connected via FC. So have been running sysman for things like find_wwid >and auto > >two of the nodes were impossibly sluggish and upon closer exam the io > from show sys was enormous for smiserver, I am doing a shutdown on one node >to reboot it and this is taking a very long time. On the other node I >simply >killed the process and restarted it, which I guess I probably should have >done >as well, although doing so I was advised that not doing it from the system >account >could be unpredictable (I think that was the phrase). > >My question is what might have caused this, i.e. the great amount of io on >the >smiserver? Communications to perform remote command functions. I've never seen great amounts of activity re SMISERVER in any of my clusters. Perhaps, you can provide more info and stats. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)COM ... pejorative statements of opinion are entitled to constitutional protection no matter how extreme, vituperous, or vigorously expressed they may be. (NJSC) Copr. 2008 Brian Schenkenberger. Publication of _this_ usenet article outside of usenet _must_ include its contents in its entirety including this copyright notice, disclaimer and quotations. ------------------------------ Date: Fri, 12 Sep 2008 11:33:31 +0000 (UTC) From: helbig@astro.multiCLOTHESvax.de (Phillip Helbig---remove CLOTHES to reply) Subject: Re: smiserver Message-ID: In article <00A7F82C.01812F79@SendSpamHere.ORG>, VAXman- @SendSpamHere.ORG writes: > Communications to perform remote command functions. I've never seen great > amounts of activity re SMISERVER in any of my clusters. Perhaps, you can > provide more info and stats. I THINK there was a bug---corrected by a patch---which caused it to hang sometimes. You can then kill the process and then restart it. From a non-SYSTEM account, you get the warning, but I THINK this is OK as long as the account in question has the necessary privs enabled. ------------------------------ Date: Fri, 12 Sep 2008 09:37:30 -0400 From: "John Reagan" Subject: Re: Spinning down an old disk array Message-ID: "Peter Weaver" wrote in message news:e97191b9-77c7-4620-8f85-276279907ba5@34g2000hsh.googlegroups.com... > Does anyone have any experience with turning off the power on disks > that have been running for years? What percentage of disks should we > expect to have fail after; > - a few seconds > - a few minutes > - 10 minutes > - 15 minutes I have 4 pair of HSZ70s with various blue bricks inside (9GB, 18GB, 36GB, 96 drives total). Power cycles (minutes to days) haven't been a problem. Still keep current backups and some drives are mirrored on the controller. I recently had to move them to another site (pushed down the hallway, into an elevator, onto a truck, driven lets say 48 miles to another state, back off the truck and into their new location). 96 drives in total, 2 died at the other end (1 9GB drive and 1 18GB drive). We restored the backups from tape. I did try to "thermal cycle" the bad drives that wouldn't spin/mount. I sealed them into a plastic bag and put them in the freezer overnight [it has worked for me in the past]. One actually tried to spin up for only for about 30 seconds. Not long enough to mount/copy any files. I'll guess the drives died not from turning them off, but the vibration of the move. John ------------------------------ Date: Fri, 12 Sep 2008 07:34:47 -0700 (PDT) From: H Vlems Subject: Re: Spinning down an old disk array Message-ID: <2e07029d-1cc9-4871-a7a6-26fb1ca669cb@x35g2000hsb.googlegroups.com> On 10 sep, 16:25, Peter Weaver wrote: > A customer is planning on doing some maintenance at their data centre. > As part of the maintenance their HSZ80 and HSJ50 disk sub-systems will > have their power cut off. Since most of these disks have been > constantly spinning for the past 8 or 9 years the customer is > concerned about the disks spinning again after power is restored. > > Most disks are DR-RZ1FC-VW and some are RZ29. > > Some people here feel that as long as the power is off for only 10 or > 15 minutes that the disks should spin up again after power is > restored. Some people here feel that even if the power is off for a > few seconds that we risk having disks not spin again. > > Does anyone have any experience with turning off the power on disks > that have been running for years? What percentage of disks should we > expect to have fail after; > =A0 =A0 =A0- a few seconds > =A0 =A0 =A0- a few minutes > =A0 =A0 =A0- 10 minutes > =A0 =A0 =A0- 15 minutes > > Peter Peter, I don't think there's a definitive answer to your question. Some of the possible RAID configurations may offer recovery possibilities should one drive fail. Other than that I'd expect full backups of all drives that are part of this maintenance project. At home I run systems that are 10 to 18 years old. Most of these systems are powered off most of the time. I haven't had a SCSI disk fail, yet. But these disks are 5400 and 7200 rpm disks with capacities of 2, 4 and 9 GB. Furthermore, all disks run in a horizontal position, so the bearings are not affected by gravity. Hans ------------------------------ End of INFO-VAX 2008.501 ************************