I've got a request from a group to add storage to a site that doesn't have a backup generator but should have short-term UPS. It's been >30 years since I have managed storage without a UPS + generator. Is this manageable at all? I know it's definitely not recommended, but can we make it work without corrupting data? The city power isn't great - I've seen multi-hour and multi-day outages. This would likely be 100% NFS v3. Don't yell at me - I'm just the messenger...
#Array without backup power
hardy sorrel
formal wasp
I'd agree it's not the best situation, but I have seen a number of arrays go down hard due to PEBCAK and have been OK. Check out this KB _ https://kb.netapp.com/onprem/ontap/Performance/NVRAM_purpose_during_ONTAP_outage
glossy halo
My only concern would be the multi-day outages. I'm looking for how long he NVRAM battery lasts, but not having any luck.
formal wasp
I’ve heard a few numbers. @jovial imp is there anything official that you’re aware of?
warped summit
Modern systems and ONTAP are fairly resilient to sudden power loss. I think you'll be fine.
fading vessel
My only concern would be the multi-day outages. I'm looking for how long he NVR...
Everything since the FAS8000/2600 de stages nvram to an ssd within like 10 seconds of loosing power, and has an nvram battery to last about 15 minutes just in case. You’ll be fine
open scroll
But yes.. have backups 😄
jovial imp
Charge for an NVRAM battery on cards used to hold the charge for 72 hours before it drained. As Alex has already said, during catastrophic power down, NVRAM destages to a partition on the boot media. Once power is restored, it will replay/restage the data.
The NVRAM battery nowadays will power the entire PCM long enough to destage the NVRAM/NVMEM contents and then power itself off
hardy sorrel
Everything since the FAS8000/2600 de stages nvram to an ssd within like 10 secon...
awesome Alex - thanks!
hardy sorrel
But yes.. have backups 😄
what is this word "backup" you speak of? 🙂
frank igloo