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UPS for linux, brand suggestions, which is compatible with linux?


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#1 Whiskers

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Posted 16 August 2004 - 05:26 AM

I'm learned cold reboots are very bad for linux, and I got to wondering well if the power dies, im screwed, so Im looking to get a ups that will safely shutdown and power off the computer when the AC power goes out.

Any brand suggestions of who is compatible with linux, and how many va would I need?

posting system specks so help determine how much va I would need
and because my system is finally good enough to brag a bit :P

19 inch CRT monitor
Asus A7nx-e Deluxe
XP 3200 2.2ghz
Volcano 12 Extreme CPU Fan
1 GB 3200 Corsair XMS Twinram
Asus geforce fx 5700 256mb
Audigy Gamer
Plextor Premium CDRW (52x)
Pioneer slot load DVD
60 gb WD 7200rpm
120 gb WD 7200rpm
2 Lian Li Moble Racks
Enermax Noisetaker 600 watter PS



#2 jimf43

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Posted 16 August 2004 - 07:45 AM

I got a couple of Belkin Model# F6C120-UNV, 670 watt units a while ago but really hadn't fully set them up with Linux. You got me looking and it would appear that Belkin does support linux and include software. I also ran across this which looks quite interesting:
http://www.starforge...rellmbups.shtml

These are very solid and reliable units. In general, I've had very good luck with Belkin. My router / gateway is also great with Linux.

#3 martouf

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Posted 16 August 2004 - 05:06 PM

I'm a APC customer - ever since the first UPS I bought.

If you choose one of their SmartUPS products, you'll have your choice of
USB, ethernet or serial link to the UPS. Also, you may either use the PowerChute
for Linux software from APC, or use apcupsd.

Read this article - start at the "Support" section and read to the end.



#4 martouf

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Posted 16 August 2004 - 05:11 PM

BTW, if you're using a journalled file system, a sudden crash halt isn't really
so terrible. The hold-up time of your power supply is enough to get the journal
entries written in most cases (something less than fully saturated disk I/O).

Still, it is nice to finish your Slashdot post by the glow of your screen while the
rest of the neighborhood is in complete darkness. 8)



#5 Whiskers

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Posted 16 August 2004 - 05:47 PM

Sweet!, looks like I will be going with APC, as for filesystem how do I check which one I'm using? And I still dont know how many VA I need.

#6 jimf43

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Posted 16 August 2004 - 06:09 PM

Originally posted by Whiskers:
Quote:
Sweet!, looks like I will be going with APC, as for filesystem how do I check which one I'm using? And I still dont know how many VA I need.

http://www.apcc.com/...e/apc/index.cfm

#7 martouf

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Posted 16 August 2004 - 06:38 PM

if you [size:4][tt]cat /etc/mtab[/tt][/color] and your filesystem is jfs|reiser|ext3
then you're using a journalled filesystem.

don't just select VA capacity based on how many watts your power supply is..

do you need your system to keep running for a very long time after the power goes,
or is it enough to do an orderly shutdown?

"orderly" meaning: you have time to finish your thought, save the file, do a quick online
weather report check, and announce to your pet/child/spouse "system shutting down
in 3 minutes".

or orderly meaning: lights go out, and you've got 3 or 4 minutes before the screen goes dark.

are you planning to plug your aquarium pump into the UPS? (don't even think about
the heaters!)

do you have a CRT or LCD monitor?
(and don't plug your laser printer into the UPS!)

would you be able to borrow someone else's APC SmartUPS long enough
to use it to measure the actual AC mains load for your system?
or do you have a trueRMS multimeter available?

the APC sizing chart is a guide, not a cookbook.



#8 Whiskers

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Posted 17 August 2004 - 12:33 AM

orderly meaning

" meaning: you have time to finish your thought, save the file, do a quick online
weather report check, and announce to your pet/child/spouse "system shutting down
in 3 minutes".

nothing else plugged in but the computer and monitor, and why is APC so expensive compared to belkin?

Belkin

800VA (450 Watts) Provides up to 45 minutes backup time Belkin On-Line Price: $119.99

Battery load capacity: 1000VA (550 Watts) Provides up to 75 minutes backup time Belkin On-Line Price: $139.99

Battery load capacity: 1200VA (670 Watts) Provides up to 100 minutes backup time Belkin On-Line Price: $159.99


APC

APC Smart-UPS XL 750VA USB & Serial 120V
Part Number(s):
SUA750XL
Price: $419.00
Runtime: 64 minutes

Back-UPS RS 1500VA + (1)BR24BP Battery Unit
Part Number(s):
BR1500 + BR24BP
Price: $449.98
Runtime: 85 minute

APC Smart-UPS 2200VA 120V
Part Number(s):
SU2200NET
Price: $819.00
Runtime: 147 minutes


these are the ones that showed up when running each sites, "help me choose" wizards.


#9 jimf43

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Posted 17 August 2004 - 05:24 AM

Originally posted by Whiskers:
Quote:

nothing else plugged in but the computer and monitor, and why is APC so expensive compared to belkin?

Mostly selling their reputation. They are very good, but, I think the Belkin is just as reliable (and cheaper).

Quote:
Belkin

Battery load capacity: 1200VA (670 Watts) Provides up to 100 minutes backup time Belkin On-Line Price: $159.99

If you shop around you may find them cheaper. I think I paid $75 for one of these on sale at officemax.

For sizing, I take Max Load X 150% but that's just me as an old custom machinery design Engineer wink You can probably get away with their auto sizing formula.

#10 martouf

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Posted 17 August 2004 - 08:21 AM

allow 140W for the CRT and another 100W for the system.

like I said, don't base your sizing on the wattage of the power supply. many PCs only draw 40W and that's mostly for the spinning disk drives.

I think you'll see what size you really need if you figure your system is a 250W load.

have a look at the BackUPS LS BP700UC aka "Back-UPS LS 700" and
price it via pricegrabber.com ..

the BackUPS RS 1500 will run for nearly half an hour.. you're paying for the
battery capacity, you know.

The BackUPS ES 725 looks like a good choice, too.

If you need extra runtime to ensure nobody misses an episode of SpongeBob,
then have a look at Smart-UPS XL 750VA.



#11 Whiskers

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Posted 18 August 2004 - 08:20 AM

The only concern I have about Belkin is that APC has linux shutdown software, and Belkin doesnt have linux shutdown software. Is there some 3rd party that has created software to shut down linux when using a belkin UPS?

#12 jimf43

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Posted 19 August 2004 - 02:22 AM

Originally posted by Whiskers:
Quote:
The only concern I have about Belkin is Belkin doesnt have linux shutdown software.

It does come with Linux software.




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