Text 3079, 223 rader
Skriven 2005-03-10 18:09:18 av John Oellrich (1:379/45)
Kommentar till text 3052 av Ellen K. (1:379/45)
Ärende: Re: The server, the editor, the optimist and the power supply
=====================================================================
From: "John Oellrich" <john@oellrich.us>
This is a multi-part message in MIME format.
------=_NextPart_000_0656_01C5259C.46DB9A10
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Ellen,
It shouldn't as long as maximum current drawn by the devices remains =
comfortably within spec. But if it or any other device like a PC power = supply
is constantly running at or close to its rated capacity it is = going to age
quickly. The bigger concern with protection devices is that = they have
protected your equipment without failing (which you may not = even be aware
of). They should be replaced (or at least sent back to the = manufacturer for
inspection/testing in the case of a UPS).
BTW how did you decide which size UPS to buy? Not an easy task.
--=20
john
john@oellrich.us
"Ellen K." <72322.1016@compuserve.com> wrote in message =
news:g5c031l5143jlsdlrui0hau50cpifq8j0u@4ax.com...
That was another thing I was wondering, does the amount of activity
being done by the things plugged into the UPS or surge protector have
some kind of back effect on it?
On Thu, 10 Mar 2005 08:45:43 GMT, John Beckett
<FirstnameSurname@compuserve.com.omit> wrote in message
<423003e7.1198563@216.144.1.254>:
>Don't try this at home. I thought I would do a bit of spring cleaning =
on a
>server where I store my stuff. It does a little bit of file sharing =
for
>others, but not much. It has probably never broken 10% CPU usage for =
more
>than a few seconds.
>
>Anyway, I came across an old log file from the MS-Blaster worm days. =
It's
>actually output from Network Monitor with a one-line packet summary =
for
>all the ICMP worm packets we received in a few hours ages ago.
>
>The file is 455M bytes of Unicode text. I was in a terminal services
>window from a workstation.In the last few weeks I've been using Vim - =
a
>very extended version of the Unix vi editor (I'm running Vim on =
Windows).
>
>The thought "What a great opportunity to test Vim!" went to my head. =
I
>opened the file in Vim. I know you're supposed to turn off Vim's =
swapfile
>and syntax highlighting etc before opening a big file, but that =
seemed
>like a lot of trouble...
>
>I was pleasantly surprised when the file appeared two minutes later. =
1.6
>million lines of Unicode text. Very fast once opened - not bad!
>
>Every second line in the file is a row of asterisks and I had =
recently
>learned how to delete all lines matching a given pattern. I =
hesitated,
>then thought that it really didn't matter, so I typed the magic =
command:
>
>:g/\*\*\*/d
>
>One minute passed without too much drama. I could open Task Manager =
(just)
>and notice the 100% CPU and the tight memory (455MB file with 512MB =
RAM).
>
>Three minutes later my terminal service session died and I could no =
longer
>ping the server. I waled to the server and found the power off. I =
couldn't
>turn it back on. A friendly technician found that the power supply =
fuse
>was pulverised. A new power supply got the server up and running with =
no
>damage.
>
>I'm not normally superstitions, but I'm thinking that a border-line =
power
>supply just might be taken over the edge by a CPU working hard for a =
few
>minutes (extra amp or two of current??). Maybe something passed out =
and a
>crowbar protection mechanism blew the fuse??
>
>John
------=_NextPart_000_0656_01C5259C.46DB9A10
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>Ellen,</DIV>
<DIV> </DIV>
<DIV>It shouldn't as long as maximum current drawn by the devices =
remains=20
comfortably within spec. But if it or any other device like a PC power = supply
is=20
constantly running at or close to its rated capacity it is going to age =
quickly.=20
The bigger concern with protection devices is that they have protected =
your=20
equipment without failing (which you may not even be aware of). They = should
be=20
replaced (or at least sent back to the manufacturer for = inspection/testing
in=20
the case of a UPS).</DIV>
<DIV> </DIV>
<DIV>BTW how did you decide which size UPS to buy? Not an easy =
task.</DIV>
<DIV><BR>-- <BR>john</DIV>
<DIV> </DIV>
<DIV><A href=3D"mailto:john@oellrich.us">john@oellrich.us</A></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV>"Ellen K." <<A=20
=
href=3D"mailto:72322.1016@compuserve.com">72322.1016@compuserve.com</A>&g=
t;=20
wrote in message <A=20
=
href=3D"news:g5c031l5143jlsdlrui0hau50cpifq8j0u@4ax.com">news:g5c031l5143=
jlsdlrui0hau50cpifq8j0u@4ax.com</A>...</DIV>That=20
was another thing I was wondering, does the amount of =
activity<BR>being done=20
by the things plugged into the UPS or surge protector have<BR>some =
kind of=20
back effect on it?<BR><BR>On Thu, 10 Mar 2005 08:45:43 GMT, John=20
Beckett<BR><<A=20
=
href=3D"mailto:FirstnameSurname@compuserve.com.omit">FirstnameSurname@com=
puserve.com.omit</A>>=20
wrote in message<BR><<A=20
=
href=3D"mailto:423003e7.1198563@216.144.1.254">423003e7.1198563@216.144.1=
.254</A>>:<BR><BR>>Don't=20
try this at home. I thought I would do a bit of spring cleaning on=20
a<BR>>server where I store my stuff. It does a little bit of file =
sharing=20
for<BR>>others, but not much. It has probably never broken 10% CPU =
usage=20
for more<BR>>than a few seconds.<BR>><BR>>Anyway, I came =
across an=20
old log file from the MS-Blaster worm days. It's<BR>>actually =
output from=20
Network Monitor with a one-line packet summary for<BR>>all the ICMP =
worm=20
packets we received in a few hours ages ago.<BR>><BR>>The file =
is 455M=20
bytes of Unicode text. I was in a terminal services<BR>>window from =
a=20
workstation.In the last few weeks I've been using Vim - a<BR>>very =
extended=20
version of the Unix vi editor (I'm running Vim on =
Windows).<BR>><BR>>The=20
thought "What a great opportunity to test Vim!" went to my head. =
I<BR>>opened the file in Vim. I know you're supposed to turn off =
Vim's=20
swapfile<BR>>and syntax highlighting etc before opening a big file, =
but=20
that seemed<BR>>like a lot of trouble...<BR>><BR>>I was =
pleasantly=20
surprised when the file appeared two minutes later. 1.6<BR>>million =
lines=20
of Unicode text. Very fast once opened - not bad!<BR>><BR>>Every =
second=20
line in the file is a row of asterisks and I had =
recently<BR>>learned how=20
to delete all lines matching a given pattern. I hesitated,<BR>>then =
thought=20
that it really didn't matter, so I typed the magic=20
command:<BR>><BR>>:g/\*\*\*/d<BR>><BR>>One minute passed =
without=20
too much drama. I could open Task Manager (just)<BR>>and notice the =
100%=20
CPU and the tight memory (455MB file with 512MB =
RAM).<BR>><BR>>Three=20
minutes later my terminal service session died and I could no=20
longer<BR>>ping the server. I waled to the server and found the =
power off.=20
I couldn't<BR>>turn it back on. A friendly technician found that =
the power=20
supply fuse<BR>>was pulverised. A new power supply got the server =
up and=20
running with no<BR>>damage.<BR>><BR>>I'm not normally =
superstitions,=20
but I'm thinking that a border-line power<BR>>supply just might be =
taken=20
over the edge by a CPU working hard for a few<BR>>minutes (extra =
amp or two=20
of current??). Maybe something passed out and a<BR>>crowbar =
protection=20
mechanism blew the =
fuse??<BR>><BR>>John<BR></BLOCKQUOTE></BODY></HTML>
------=_NextPart_000_0656_01C5259C.46DB9A10--
--- BBBS/NT v4.01 Flag-5
* Origin: Barktopia BBS Site http://HarborWebs.com:8081 (1:379/45)
|