Power Failure

[Poppa]

I just experienced a momentary power failure while moving data to my FreeNAS server. What is the first thing I should check/do to make sure my drives and ZFS pool and data are ok?

 

[joeschmuck]

Run a Scrub.
Next buy an UPS and put your FreeNAS on it to prevent this type of issue from happening in the future.

 

[Poppa]

Run a Scrub.
Next buy an UPS and put your FreeNAS on it to prevent this type of issue from happening in the future.

I don't understand how to run a scrub right now. There is one scheduled that I didn't set up but I don't know how to start a one time immediate scrub. I also don't know to to view the results.

By the way, I have a UPS, two in fact with and extra bank of batteries for one but due to their enormous power requirements (100amps) they are not installed.

 

[rs225]

If the pool is up, then it is very likely 100% ok. You would want to check files that were modified in the last ten seconds or so before the power outage to make sure they are there and complete.

 

[joeschmuck]

I don't understand how to run a scrub right now.

Read the User Guide, it will tell you how.

By the way, I have a UPS, two in fact with and extra bank of batteries for one but due to their enormous power requirements (100amps) they are not installed.

That is a serious UPS! But they do no good if they are not connected.

 

[Poppa]

I found out how to run the scrub.

Any idea how long it will take my 36x6TB pool with 24TB used to complete?

 

[Stux]

The time it takes to scan 24TB.

 

[Stux]

If you use the console to run zpool status

You can see an estimate of how long

 

[Poppa]

If you use the console to run zpool status

You can see an estimate of how long

Does not work. It does not show all the information and does not give me a way to scroll up or select all the text.

 

[rs225]

Try zpool status poolName | head

 

[Poppa]

Try zpool status poolName | head

Thanks!


8.45T scanned out of 24.0T at 1.57G/s, 2h48m to go. 0 repaired, 35.26% done.

It is going a lot faster than I thought.

 

[farmerpling2]

While you are learning use the "| more" to see all of the text in order of occurrence...

Code:

# zpool status -v | more

  pool: freenas-boot
state: ONLINE
  scan: scrub repaired 0 in 0h1m with 0 errors on Sat Sep 30 21:16:50 2017
config:

  NAME  STATE  READ WRITE CKSUM
  freenas-boot  ONLINE  0  0  0
  da0p2  ONLINE  0  0  0

errors: No known data errors

  pool: data1
state: ONLINE
  scan: scrub repaired 0 in 1h39m with 0 errors on Tue Sep 19 16:56:26 2017
config:

  NAME  STATE  READ WRITE CKSUM
  data1  ONLINE  0  0  0
	raidz2-0  ONLINE  0  0  0
	  gptid/f8be2dcd-9372-11e7-8f10-d8cb8a9edb89  ONLINE  0  0  0
	  gptid/379cff72-942e-11e7-8f10-d8cb8a9edb89  ONLINE  0  0  0
	  gptid/6c190144-95c4-11e7-8738-d8cb8a9edb89  ONLINE  0  0  0
	  gptid/80ad21b4-9a6e-11e7-959a-d8cb8a9edb89  ONLINE  0  0  0
	  gptid/2806b657-048d-11e7-b6f6-d8cb8a9edb89  ONLINE  0  0  0

errors: No known data errors

 

[joeschmuck]

It is going a lot faster than I thought.

It depends on the pool structure, how much data you have, and your hardware. Some systems will fly, some will seem like they are crawling.

 

[Chris Moore]

I don't understand how to run a scrub right now. There is one scheduled that I didn't set up but I don't know how to start a one time immediate scrub. I also don't know to to view the results.

By the way, I have a UPS, two in fact with and extra bank of batteries for one but due to their enormous power requirements (100amps) they are not installed.

If they are not installed, you don't have any.
Get something you can use and use it.

Sent from my SAMSUNG-SGH-I537 using Tapatalk

 

[SweetAndLow]

Over $8k in just disks. This seems fishy since you don't know how to use a command line.

Read the manual cover to cover, read the noon guide, read the burn in guide. Read everything before you actually start to use this thing.

 

[danb35]

I knew there was a good reason I ignored this guy...

 

[Chris Moore]

I just experienced a momentary power failure while moving data to my FreeNAS server. What is the first thing I should check/do to make sure my drives and ZFS pool and data are ok?

You need to learn how to use SSH to get a remote session to the shell, then you can scroll to see what you missed.
Why did you put 24TB of data in before learning to use the system?
Why would you put any data into the system with no UPS?
I have a UPS on my laptop and it has a built-in battery.

Sent from my SAMSUNG-SGH-I537 using Tapatalk

 

[Poppa]

I knew there was a good reason I ignored this guy...

So you ignored me (but are still able to see my posts?) because I was using hardware the FreeNAS was incompatible with? Excuse me for not knowing everything and for not being an expert. We all got to start somewhere...

Don't be a superior snob.

 

[Poppa]

You need to learn how to use SSH to get a remote session to the shell, then you can scroll to see what you missed.
Why did you put 24TB of data in before learning to use the system?
Why would you put any data into the system with no UPS?
I have a UPS on my laptop and it has a built-in battery.

Because all my drives were full and I needed to start storing my data right away. I spent several months familiarizing myself with FreeNAS. Do you expect me or anyone else to spend several years learning everything there is about FreeNAS or BSD or maybe even learning to code before using it? Isn't the point of something like FreeNAS is that it is supposed to be easy to setup and use by the average person?

 

[Chris Moore]

Isn't the point of something like FreeNAS is that it is supposed to be easy to setup and use by the average person?

No. That is not the point at all. That is why there are so many resources available here, so you can learn. I spent months doing my research before I built my first system for testing and, based on what I learned, I bought better hardware before I moved my important data onto the system.
I acknowledge that everyone has to start somewhere, but the proper start is to read, ask questions to further understanding, learn more, ask more questions, then build. Plan ahead, don't wait until you need it right now and then try to rush into it before you are ready.