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ML350 G6 UPS issues?

johnv_2
Occasional Advisor

ML350 G6 UPS issues?

I am having a weird issue with my new ML350 G6 server. It is setup through a UPS to provide power protection. Last night we had a power outage and the server immediately went off, even though other devices connected to the UPS were still powered on. I have checked to UPS to verify that it is not too much load for it and it is fine and i also verifies that it was plugged into a backed up outlet. I did a test today with the UPS and when the UPS goes into backup power the server shuts down and you can here like a relay clicking inside of the server. Does anyone have any ideas on what is going on?

PS...This server is only configured with one power supply from the factory.

Thanks,

John
93 REPLIES
marcus1234
Honored Contributor

Re: ML350 G6 UPS issues?

psu could be faulty

and ups battery may not be fully charged yet
the server does not care where it gets power as long asit is enough,

try the powersuply in the other bay in the back does the powersupply work in both bays , does it have black trace arc marks on its tips , if so replace power supply and the power backplabe in the server and do not connect to the ups till you are sure ups is setup correct,,



This is how we thank in the forum

http://forums11.itrc.hp.com/service/forums/helptips.do?#33

marcus1234
Honored Contributor

Re: ML350 G6 UPS issues?

all thanks to Matti Kurkela he answered a post similar looks like a good answer for you too

Some UPSes have a special "bypass" outlet for laser printers or other high-peak-load devices. This outlet has the same over-voltage and RFI protection as the rest of the UPS, but it does NOT offer any protection against power failures.

Are you sure you did not plug your DL380 G6 into such a special UPS outlet?

Some UPSes have multiple "load groups" allowing the UPS control program to shut down some UPS outlets while continuing to provide power for others. If such an UPS is mis-configured, it may switch off one of the load groups immediately.
Juan C Pacheco
Occasional Visitor

Re: ML350 G6 UPS issues?

I have the same problem with my proliant ML350 G6 i have tried with 3 differents UPS (APC 1.5KVA, Tripplite 1.1KVA and a Deltec UPS 1.1Kva). I have checked the power cable, the ups outlet and the UPS batteries. I Don't know if the server just work with HP UPS or if I have to make some setup on the BIOS or BIOS update.

Please help me ... this server is a pre-configured model from HP with one power supply

Thanks

JC
Pogumirskiy Nikolay
Frequent Advisor

Re: ML350 G6 UPS issues?

johnv
Please post your UPS model. If server use "active PFC" power supply some UPS may have a problem when it "on battery" state. The problem is in approximation of output voltage used by UPS. When it use step-form not sine wave voltage server may switch off.
johnv_2
Occasional Advisor

Re: ML350 G6 UPS issues?

I have the APC UPS listed below. I verified that the power consumption is well within the limits of the UPS and wehn I did my testing the only thing connected was the UPS. Do you think the PSU in the HP server does not like the sinewave that the UPS is producing? This is now the third post I have seen with people having the same issue.

APC BACK-UPS RS1500VA LCD 120V

John
Pogumirskiy Nikolay
Frequent Advisor

Re: ML350 G6 UPS issues?

Yes, APC BACK-series is low-cost and use stepped approximation to a sinewave. I recommend you to test ML350G6 with APC Smart-series if it is possible.
Tom Szabo
Occasional Advisor

Re: ML350 G6 UPS issues?

John,

Have you had any luck with this issue? I'm having the EXACT same problem, we've replaced power supplies, power supply backplane, etc and it's still happening. HP has been no help at all (other than throwing hardware replacements at it).

Thanks
johnv_2
Occasional Advisor

Re: ML350 G6 UPS issues?

Yup,

You need a UPS with a true sinewave output. I found someone local selling off a APC Smart-UPS 1500. Plugged it in and it works great.

John
Tom Szabo
Occasional Advisor

Re: ML350 G6 UPS issues?

Thanks a lot, I was just coming to this realization talking to HP again. Funny that they can't tell me exactly what a power supply in one of their products needs.
alex_sun
Frequent Advisor

Re: ML350 G6 UPS issues?

ML350G6 Power Supply Max. Inrush Current 30A , Max. Inrush Current duration 20mS. view UPS Specifications.
paul lowe_2
Occasional Advisor

Re: ML350 G6 UPS issues?

John, Do you have the exact model number of your new UPS, I am having the same issue.

Cheers.
johnv_2
Occasional Advisor

Re: ML350 G6 UPS issues?

andy-x
Advisor

Re: ML350 G6 UPS issues?

I have a ML350 G6 with two power supply and a Tecnoware sine output 1,5Kw and work very well.
When i try with low cost UPS i have many problem. With UPS is best not joking...
sorry for my english.
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

I have the very same problem. HP support "thinks" that 1500va UPS should be plenty. I even have separate UPS's on each Power supply, and it shuts down immediately when power is removed from UPS.
johnv_2
Occasional Advisor

Re: ML350 G6 UPS issues?

What model UPS's are you using?

John
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

I originally used an APC 750. When that wasn't adequate I switched to an APC Smart-UPS 1500. Currently I have one power supply plugged to the wall outlet, and the other to the 1500.
johnv_2
Occasional Advisor

Re: ML350 G6 UPS issues?

You should not have any issue with that setup. Maybe you have an issue with the switching of the power supplies when one fails. Also, I think there is a bios setting how it the computer treats the power supplies, you may want to check that.

John
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

I thought about changing the power supply setting in the BIOS to BALANCED. Currently it is (can't quite remember the terms) High Efficiency...that uses both PS's. I also need to figure out how to set it to restart after a power outage. Sometimes it will, but it usually requires a press of the power button to restart.
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

Hey everyone,

I have been checking the HP SUPPORT FORUM and the HP IT RESOURCE CENTER. Threads are present on both about the problems I am having. 1) the ML350 G6 powers off for no know reason and does not restart (in these cases there is no apparent loss of AC power), and 2) the ML350 G6 does not stay powered-on during power outage even when on UPS of significant size.

Mine has been running for about 2 weeks now without #1 above occurring. I have upgraded ILO drivers, and firmware to 6.2. Yesterday I applied the P410 ROM flash. Initial results indicate that #1 may be resolved. Only time will tellâ ¦

On #2, the server shows about 2.1 amps draw when running normally, but will not stay on if I unplug the AC on an APC 1500va UPS. Does anyone know about the sensitivity of these new power supplies?

In the midst of this I had a tape drive fail, so I have had trouble isolating the issue with so many problems occurring... been chasing this servers problems for 3 months and bought two UPSs.

Wayne
TomCahill
Occasional Visitor

Re: ML350 G6 UPS issues?

Wayne,

can you provide links to the updates you installed?
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

Dan Soukup
Occasional Visitor

Re: ML350 G6 UPS issues?

I have 2 DL380 G6 units with the exact same problem. Both on separate APC model XS 1500 backups. Both do the same thing. You can unplug the backup from the wall, the server goes down, then re-insert the plug and the servers stay down. Furthermore, on one backup I also have a tower server and that one stays on. The server bios is set as per factory, plugged into the right circuits on the backup and I've tested it by unplugging at the power supply and re-plugging, and it boots up automatically as it should.

Yesterday both servers went down even though there was no noticeable power dip in the office and no other computers went down, even ones plugged directly into the wall.
Tom Szabo
Occasional Advisor

Re: ML350 G6 UPS issues?

Dan,

Part of your problem is that model UPS from APC outputs a 'stepped approximation to a sine wave'. http://www.apc.com/resource/include/techspec_index.cfm?base_sku=BX1500LCD

It appears that you need a 'true sine wave' for these servers. An APC SUA1500 should resolve the issue.
Wayne Henegar
Frequent Advisor

Re: ML350 G6 UPS issues?

After weeks of testing and waiting for the next power outage/surge, I am reasonably certain that there are no software issues present. Instead, it is a characteristic of the new, energy-efficient power supplies not being compatible with the low-end UPSs on the market. These new servers will shut off at a minimal fluctuation in voltage, fluctuations that are not noticeable to the eye or noticeable to other servers and PCs. I delayed this post until convinced that my new configuration is stable.

I am now using an Eaton PowerWare 9130 700va (double conversion type, not interactive like the APC was). My #1 power supply is connected to utility power with surge protection, and the #2 power supply is on the Eaton UPS. If there is extended outage and the server shuts down, it is automatically restarting when power returns. Thanks to all for input that helped me solve this.

Wayne