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Messages - Brahim

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1
Snapshot RAID / Re: Crash during create
« on: December 12, 2017, 05:31:24 pm »
Seasonic 850w not adequate?
http://a.co/1OHhz1L

Im only running 6 storage drives 1 os and 1 bacup drive. 30w x 8drives = 240w leaving 600w for everything else, I think that would be adequate. Please tell me if this logic is flawed.

Could you point out some free stress test software?
Ah, sorry I missed that. I saw cheap something and read that as the PSU. You were actually referring to your controller and not PSU.
Do a crash dump analysis: http://www.osronline.com/page.cfm?name=Analyze

2
Snapshot RAID / Re: Quick-validate error: ZipException
« on: December 12, 2017, 02:15:15 pm »
...
Looks like a full Parity rebuild required. :(
Sounds like you were running out of space on the PPU. Remember to do a quick-format on it to force out any Windows junk. Windows has the habit of leaving shadow data on random disks, which shrinks their available free space.

3
Snapshot RAID / Re: Crash during create
« on: December 12, 2017, 02:08:57 pm »
Have you tried running stress tests of your new PC? Computing parity is fairly intensive, so it sounds like something is giving in on your new setup.
+1

@OP
Just get a new power supply. The one you have does not seem to be adequate for the load.

4
Snapshot RAID / Re: hanging on the restore pre-validation process
« on: December 12, 2017, 02:05:49 pm »
I wish the software aspect came as easily as the hardware aspect for me :)

system is 220 watts under load at the wall, and power supply is 1000 watts with over 80 amps available on the 12 volt rails :)
...
With 23+ disks, expect a much higher usage under peak load. But great that the PSU is 1KW.

....
i am running the restore now, and will post the results of this instance soon
Hopefully, you enabled TRACE logging for more details: http://wiki.flexraid.com/2011/03/26/how-to-enable-more-verbose-logging/

5
Snapshot RAID / Re: hanging on the restore pre-validation process
« on: December 12, 2017, 11:56:50 am »
It is not about CPU or RAM. It is about your power supply and system stability under heavy I/O load.
So, both your PSU and disk controllers must be robust for the load. Not saying it is not. Just saying keep an eye on that aspect.

6
Snapshot RAID / Re: Quick-validate error: ZipException
« on: December 12, 2017, 09:46:53 am »
Hijack the parity disk by giving it a drive letter. Then delete the current flxr.meta and replace its most recent backups. Backups are on the same disk and have numbers appended. The highest number is the latest.

If you have multiple PPUs, do that for each.

7
Snapshot RAID / Re: hanging on the restore pre-validation process
« on: December 12, 2017, 09:43:32 am »
i had read up prior to purchase, and thought i had setup the array accordingly..
it was running weekly updates per the scheduler, and i just looked and do not see an option for t raid in my configuration.
...
It helps to re-read things.
tRAID is a different product. See comparison here: http://www.flexraid.com/download-try-buy/ and here http://www.flexraid.com/2013/10/04/table-comparison-of-transparent-raid-vs-raid-over-file-system/

Also, it looks like you have 22 data disks to one parity. Is your system strong enough to handle that many drives in a single array?
Maybe split the array into two for easier maintenance?

8
Snapshot RAID / Re: hanging on the restore pre-validation process
« on: December 11, 2017, 09:58:58 pm »
so, i can still attempt a parity restore (id like to know that it works) but when i see the logs are 3+ hours behind current and see it stall in the same place multiple times i tend to think there might be an issue.

what do you need to help me troubleshoot this so i can learn and not have so many issues the next time?
It is really about you understanding the fundamentals. So, hit up the wiki.

1. Google "parity raid" and read up
2. Make sure you  are familiar with (in case tRAID might be a better option for you): http://wiki.flexraid.com/2011/10/18/understanding-the-limitations-of-snapshot-raid/
3. http://wiki.flexraid.com/2011/03/26/testing-flexraids-recovery-abilities/
4. Back to the wiki and read as much as you can: http://wiki.flexraid.com/category/raidf/

9
Snapshot RAID / Re: hanging on the restore pre-validation process
« on: December 11, 2017, 07:54:37 pm »
well,

i tried unplugging the other drives and according to the logs it got farther, but then failed with a
[2017-12-11 19:17:57,951] ERROR: [restore] error: IOException[Too many failed devices! Failed=22 - Number of devices supported to be restored at a time: 1]
java.io.IOException: Too many failed devices! Failed=22 - Number of devices supported to be restored at a time: 1
....
Sorry, but you are being quite goofy.  ::)
When you don't understand things or are unsure, it is best not to do anything rather than doing totally silly things.

The basic premise of RAID is that all surviving disks are required to rebuild the failed one.

Quote
...
this has been a terrible experience. there was no reason for a file unrelated to the restore to completely halt operations.  additionally, this wasted almost 16 hours of my day.
...
Those files are fully related to being able to restore the failed data. That's just how the system works. Parity is not backup. Think of it as an algorithm that's used to rebuild data but it requires the remaining data as an input to do it.

The Restore Pre-Validation will take quite a while to run if you have a lot of files and have missing files. It does (or tries to do) all sort of smart things so that it can restore successfully despite the screw ups.

10
General Discussion / Re: RAID over File System (RAID-F): The re-design
« on: December 11, 2017, 07:34:10 pm »
Since RAID-F is going to be implemented into the unified product soon, does this mean this project has been canned? Or is the major redesign still going to be released separately?
Nothing is being canned. Everything is being improved into a unified product.
Existing installations and licenses will remain valid and supported. Production installations that are working just fine won't need to be disturbed.
Don't get too distracted by the new shinny thing in the works. Once it is out and has enough compelling features for you to migrate, then you do.

11
Good Info Thx,

What about the 2nd part of the question?

How much data is needed as parity to prevent loss with 30TB of data in tRAID?
It is not the amount of data nor disk count that matters.
The only thing that matters is that you have at least one disk for parity. You can protect an infinite number of disks and data with only one disk. You can further improve the tolerance level by dedicating two disks for parity. The only requirement is that the parity disk(s) must be as large or larger than any given single data disk.

In your configurations:
- 4x4TB only 1x4tb is needed for parity
- 4x3TB only 1x3tb is needed for parity

You could have also had one single configuration with all ten disks in a single array and only 1x4tb being needed for parity. However, having two smaller arrays as you have is better than a single larger one (i.e., eggs in two baskets vs eggs in a single basket).

12
Snapshot RAID / Re: Snapshot RAID Pause Resume ?
« on: December 11, 2017, 09:33:25 am »
I think I have found the worry, the fact of not having chosen the expert mode.

I created the RAID directly from the drive manager.

when I created, I did not specify the number of DRUs and PPUs.
...
You are worrying me.  :o
You clearly aren't paying attention. If you look at the screenshot I posted, the Toolbox is for the Cruise Control configuration. All you had to do is hit on "Home -> Toolbox". How did that turn into creating an Expert mode Snapshot RAID?



Please spend some time on the wiki: http://wiki.flexraid.com/
And in particular: http://wiki.flexraid.com/guides/getting-started-guide/


13
Snapshot RAID / Re: Snapshot RAID Pause Resume ?
« on: December 10, 2017, 12:31:02 pm »
i don't have Command Execution Center in Toolbox.

Are you sure you are running RAID-F and not tRAID?
You should provide screenshot of what you are looking at.

14
Snapshot RAID / Re: Snapshot RAID Pause Resume ?
« on: December 10, 2017, 11:14:38 am »
The Pause/Resume is always there.
Just hidden under Toolbox -> Command Execution Center.

15
Snapshot RAID / Re: Snapshot RAID Pause Resume ?
« on: December 10, 2017, 09:43:37 am »
Let the Create task run in one pass.

The Pause/Resume feature is there. However, users have reported issues with it. It works in my test setups. However, I was never able to get to the bottom of why others have had issues with it. The speed should improve. You will see lower speeds when it is processing lot of small files.

So, let it do its thing. :)

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