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One of my email servers was down for three days. Need data that you may have. See Email. Thanks https://discussions.virtualdr.com/
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[This message has been edited by greengoose1 (edited 07-07-2001).]
have a question myself
still searching for older weeklies, have found a few more...
thought all that good info got lost
still cannot locate safety, surge protection
havent gotten newsletter for this week?
also think a short index at end of topic
(the epilogue or parting shots should point to new topic, but should perhaps also (at least once in a while) list the past topics
that's what I had in mind when I started looking.
(still had to wade thru 16 o/t op deltas...
right now, I'm off to bed.
nite' all
[This message has been edited by jtdoom (edited 07-07-2001).]
Two things I need for my files that you may have is the last Langa List and VirDr Newsletter.
I'll see about finding surge protection. https://discussions.virtualdr.com/
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Weekly
Operatiom Delta changes to Weekly Subject
: Weekly Subject - Considerations Before Building
Weekly Subject 02 - Safety and Computers
Weekly Subject 03 - Cooling
Weekly Subject - 05 - Cases and Power Supplies
Weekly Subject - 06- Mobos and CPUs
Weekly"]http://discussions.virtualdr.com/Forum17/HTML/003394.html]Weekly Subject - 06B- Motherboards & CPUs[/url]
Weekly"]http://discussions.virtualdr.com/Forum17/HTML/003446.html]Weekly Subject-06C- Mobos and Cpus[/url]
Weekly Subject -07- BIOS
Weekly"]http://discussions.virtualdr.com/Forum17/HTML/003644.html]Weekly Subject-08-Chipsets and Controllers[/url]
[This message has been edited by Train (edited 07-08-2001).]
Jaak, Try this. Surge protection was our tranistionary subject as we developed Weekly Subject. This thread is where it started. https://discussions.virtualdr.com/
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Train, good to see your back. https://discussions.virtualdr.com/
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Things are looking up, I see.
https://discussions.virtualdr.com/
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thanks
at least they was still up
I don't subscribe to langalist
and did not get the VDr newsletter I subscribed to last week..
(I figure it went in limbo when that new your router went down? I could not get to VDr for over a day... )
When do they send these out??
If anyone has these, please feel free to mail them to GG1 and me.
I am going to re-re-subscribe...
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Yo Diddly, come from the voodvork out!
jaak
No vdr newsletter for this week evidently and I sent the last two langa list.
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[This message has been edited by Train (edited 07-08-2001).]
Train, Oops disregard last E mail then. https://discussions.virtualdr.com/
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greengoose1
To late https://discussions.virtualdr.com/
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got langa and wondered.
get back here and I find out why..
https://discussions.virtualdr.com/
I just had a 30 GB drive die on me.
it no londer spins...
I could try that freezer trick?
Tomorrow, the shop is open. https://discussions.virtualdr.com/
get home, get dead drive, go to shop.
, get new disk in return (full warranty), maybe get cup of coffee...
I estimate it will take 19'48" (without coffee) to replace it.
data has always been on more than one drive.
and it was a data storage "backup" drive.
still, it wouldn't be funny had I not had that backup mentality.
its twin is currently getting the data that was saved to it, and this weeks new stuff.
I wonder what happened to cause this.
https://discussions.virtualdr.com/
whatddaya think, should I put it in tha freezer?
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Yo Diddly, come from the voodvork out!
Jaak, never had to try the freezer trick. https://discussions.virtualdr.com/
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nope
it did'd spin up after deep-freeze and thaw.
https://discussions.virtualdr.com/
you can't win 'em all.
GG1, I believe the freezer trick only works if the problem is that the drive belt has streched.
JAAK, how long did you set the microwave to thaw out the hd? https://discussions.virtualdr.com/
EDIT: Jan, 01, lost 13 gig Maxtor, frezzer tricked worked 3 or 4 times was only able to recover couple of gigs each time until the belt got hot. Lost rest of the data.
https://discussions.virtualdr.com/ Opovet https://discussions.virtualdr.com/
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I know it is true because I read it on the internet from a VirtualDr link!!
[This message has been edited by Opovet (edited 07-09-2001).]
Thanks opovet for the info. https://discussions.virtualdr.com/
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[This message has been edited by greengoose1 (edited 07-09-2001).]
any of you guys ever read how MTBF is estimated?
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Yo Diddly, come from the voodvork out!
Jaak, I have not. https://discussions.virtualdr.com/
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From what I understand, MTBF is at best a "guesstimate" after only a few hours of running the hard drive through some hard paces. Wouldn't put too much stock in the numbers (hours). Now, a 10 year warranty would be real nice.... https://discussions.virtualdr.com/
I would have to find the zine this was in...
the gist of it...
take a fairly large number of drives, and hook them up to have them continiously go through their paces.
time it when one fails, time it when second fails.
(cannot remember if that includes stressing by repeated spin-ups)
employ statistics
imho, an almost meaningless number is obtained.
RMA would be useless as they have no statistics on the time the drives actually ran?
would like to find back article...
if 100 drives pass 100 hours, does that make 10.000 hours?
the method was explained...but I do not remember how the statistical calculation went
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Yo Diddly, come from the voodvork out!
Found the formula!
Take 25 5600rpm hard drives>run at 10,000rpm for 10 hours>bring speed down to normal>autoplay a looped Quake demo for 24 hours>place drives in freezer; freeze for 10 hours>place frozen drives in microwave oven on HIGH for 4 1/2 minutes or until tender>then take 5600rpm, divided by your IQ, subtract the projected profit of those drives from selling them to unsuspecting customers> add 10 hours just for good measure> Viola! MTBF count!
[This message has been edited by bistro (edited 07-10-2001).]
bistro
4 1/2 minutes under the gun
Bet someone gets a blast out of it.
LOL ROF
Probably the way they do it though https://discussions.virtualdr.com/
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[This message has been edited by Train (edited 07-10-2001).]
Then,,,try to find a drive that wasn't assembled on a Monday by someone hung-over from the weekend.. https://discussions.virtualdr.com/ https://discussions.virtualdr.com/ https://discussions.virtualdr.com/ https://discussions.virtualdr.com/
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Get off my Interface!!
What's the optimum operating max and min temperatures that can be exceeded to ensure a proper failure of the serially connected components? https://discussions.virtualdr.com/
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Between a Oxyacetaline torch and liquid Oxygen, they should take care of it https://discussions.virtualdr.com/
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Train, Or how about a 105 for max performance.
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I dunno...if I reach 105 degrees, my MTBF is about 5 minutes....
If the thing overheats you could throw it in a Cryo bin, that will cool it down quick....
And our collective point is?
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Don't get a hard drive with a MTBF of 5 hours....
Look at the warranty also when considering a hard drive. If they have a long warranty, it's probably based on their MTBF "research".
Fans, fans, fans. Cool that sucker down.
hehehee LOL
Hi
been looking at a few things http://www.digit-life.com/articles/storagereliability/
I read one weird thing here...
Quote:
In addition, we assume that drives are subjected to a 24-POH integration period by the device manufacturer. Since any drives that fail during this period are returned to Seagate and are not shipped to the end-user, they are not counted in the first year AFR and MTBF.
http://204.212.103.100/src/whitepape...f/qntmtbf4.htm http://204.212.103.100/src/whitepapers/mtbf/mtbf1.html
PCguide has this http://pcguide.com/ref/hdd/perf/qual/spec_MTBF.htm
what's MTBF mean to the consumer? http://www.pcguide.com/buy/des/compHDD-c.html
this one is like simplified reading, with examples http://www.polyamp.se/eng/mtbf.html
how about a three Billion watt hard disk read head? http://www.planetee.com/planetee/ser...ArticleID=2416
https://discussions.virtualdr.com/
Jaak, I think the quote means the failed units are not counted in the average. https://discussions.virtualdr.com/
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yeah, OEM are supposed to do some burn in (and when I saw an assembly line described in a zine some ys ago, it seems they do, but they may not do all?)
I suppose they put a base install clone on, and fire it up.
if the drive dies in the assembly line, why not count it in expected life cycle statistics?
an OEM seeing many instances of this will soon get another model/other brand.
and yet, it gets compared with infant mortality, or a SWAG, and is not used in MTBF... http://www.beowulf.org/pipermail/beo...ne/005100.html
the earlier whitepaper confirms this, don't it?
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Yo Diddly, come from the voodvork out!