5 votes
Accepted

Can I power 2x6 socket surge protected PDUs from a surge protected UPS?

No, you shouldn't use surge protected PDUs. Instead, use a plain, quality PDU without surge protection. This is recommended by APC. Also, read this for some nice background explanation.
  • 97.9k
4 votes
Accepted

APC Switched PDU: group outlets on different PDU's

Yes, you can configure ports on two PDUs to be turned off/on. I'm concerned about your use of "daisy chain". I don't think you mean to say that. APC PDUs support outlet groups configured between PDUs ...
  • 196k
4 votes
Accepted

AP8941 PDU frozen, how to reset management interface?

If you have physical access to the PDU, just use a paper clip to press the reset button. It won't affect the outlet status.
  • 97.9k
3 votes
Accepted

UPS systems in parallel for redundancy and/or capacity, generator as backup, ATS,

Your first setup (with the Y cable) is the basic idea for a parallel UPS system, but you won't actually use a Y-cable; the UPSes would be hard-wired to an external paralleling system which should also ...
  • 4,171
2 votes

automate settings change on multiple power appliances

Look into expect. Alternative implementations for other languages and systems than Tcl exist (e.g. pexpect for Python or the Ansible expect module). For 100s of devices, I would particularly look ...
  • 97.9k
2 votes

APC PDU has wrong idea of its outlets

Open a case with APC. On different equipment I would say that the device has lost connection to its backplane.
  • 7,677
2 votes

How to diagnose false positives with a smart PDU ping'ing devices on LAN

Do not do this. You have already identified a potential problem if a switch goes down and the PDU power cycles other devices. And power cycling has risks for the integrity of some systems that should ...
2 votes
Accepted

Rack PDU with IP control and surge protection

There are a whole lot of "it depends" on this one. In most cases involving a managed PDU, suppression is handled upstream somewhere. If you are in a colo I would recommend talking to their power ...
  • 841
2 votes
Accepted

Load distribution across PSUs on a Dell PowerEdge

I've found the specific answer to the distribution question now, so sharing here just in case others want it. According to the R630 Owner's Manual on page 99: When two identical power supplies are ...
  • 3,195
2 votes

What is the difference between a PDU and a power strip (both 120V, 15A)?

I found this from APC's FAQs: Using surge strips with APC's Back-UPS and Smart-UPS products. Looks like a PDU is a bit different than a regular power strip. Surge protectors filter the power for ...
1 vote

snmpwalk: Decryption error for APC Rack PDU

Unfortunately I can't comment yet, so giving here my 2 cents: your snmpwalk command misses the option to specify the security level: -l LEVEL set security level (noAuthNoPriv|authNoPriv|...
  • 41
1 vote

automate settings change on multiple power appliances

The cloud-generation answer to your question is a programmer-friendly REST API over HTTPS, which your appliances do not seem to have. The canonical decades-old answer to your question is expect. ...
  • 3,497
1 vote
Accepted

Zero-U PDU preferred mount location

It depends... You should post the brands of the equipment involved. For me, if it's a co-location facility, I'll take the lead of what the facility's staff recommend. They're the ones who need to ...
  • 196k
1 vote

Power Usage via IPMI or BIOS or?

You can query the power consumption with ipmitool: ipmitool -I lanplus -H ${BMC_HOST} -U ${BMC_USER} -P ${BMC_PASS} dcmi power reading or on newer systems with redfish: curl -s https://${BMC_HOST}/...
  • 761
1 vote

Load distribution across PSUs on a Dell PowerEdge

It depends a bit on your server manufacturer and system settings, but check out the details at: How do servers with redundant power supplies balance consumption? It sounds like your real question is:...
  • 196k
1 vote

UPS systems in parallel for redundancy and/or capacity, generator as backup, ATS,

I'd recommend sizing for the runtime and protections you actually require. Please look into extended-runtime UPS solutions compatible with your units. You can add extra runtime via additional ...
  • 196k

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