Recent Posts

Pages: [1] 2 3 ... 10
1
General Discussion / Re: Strange Data Corruption Issue
« Last post by Skirge01 on October 21, 2018, 03:38:51 pm »
The issue is that the data on the failing drive got corrupted because the drive was dying and that bad data was then replicated to the parity drive because tRAID is live, rather than a snapshot RAID like RAID-F.  This isn't a failure of tRAID as the same would happen under most other RAID technologies.  Restoring from the parity drive got your data back onto a healthy drive, just as designed.  I'd guess that you likely did not lose everything which was on the failing drive, but actually managed to recover quite a bit.

What you seem to have done "wrong" is consider RAID as a full backup solution.  It's not.  While you do get some redundancy and peace of mind using RAID, any data you want to ensure is not lost must be duplicated.  As you saw, if a drive begins to fail and starts writing bad data, that bad data gets written to the parity drive and cannot be recovered without restoring from a real backup.  Again, the parity drive is not an actual backup.

Most of us feel that movies are not critical to lose, so we don't actually back them up in software.  RAID gives us just enough redundancy, so if a drive fails and we lose a few movies, it's no big deal.  Our actual backup is the physical movie disc.  If this risk isn't acceptable to you, then you would need to double your storage and create real software backups of your movies.

When you say "I used to run update on weekly basis", do you mean running a VERIFY, VERIFY+, or VERIFY SYNC on your tRAID array?  If so, then you're not understanding what that job does.  You can read up on that here.  In short, they verify the parity on the PPU matches the data on the DRUs.  In your case, the corrupted data was sent to the parity drive, so as far as those jobs were concerned the data matched.

One thing which could mitigate your losses is installing HD Sentinel.  That software will monitor your drive's health 24/7 and alert you if one might be failing.  That has saved me many times (especially back in the horrible Seagate days) and, most often, I was alerted a drive was failing long before any data got corrupted.  So, I was able to take the drive out of the array and replace it with a healthy drive.  Also, because I was alerted so early, I was usually able to copy all the data directly off the failing drive and put it on the healthy drive, without restoring from parity at all.  I will never run any computer (server or even a laptop) without this software installed.

Hope that helps!
2
General Discussion / Strange Data Corruption Issue
« Last post by hussain on October 20, 2018, 12:28:01 am »
I have windows 10 based system with five 2 TB hard drives with 4 DRU's and 1 PPU.  i have stored all my bluray onto the server in mkv format. Now suddenly the MKVs have started to come corrupt. The mkv start to play and then suddenly stop. I have tried to copy movie onto flash drive and then play but still same issue.
Can somebody tell me what is going on. I am extremely perplexed.

Update:
I checked and all corrupted files were from hard drive which recently failed and I recovered data via parity drive. I used to run update on weekly basis even then most of the data recovered is corrupted. What is the use of flexraid if it cannot recover data or did i do something wrong? Can somebody tell me how to ensure that this does not happen in case of another hard drive failure. thanks
3
Snapshot RAID / Re: Confused - how to make snapshot raid
« Last post by artroom on October 17, 2018, 06:06:17 pm »
OK. I think I will bite the bullet and just buy another HD now (which is what I was hoping to avoid).
That way I can just put everything back into 1 big storage pool and have enough PPU to cover it all.
Anything else sounds like it will get too messy, and I don't want to spend too much time on anything new, or money on new software.

thanks for your help.
4
Snapshot RAID / Re: Confused - how to make snapshot raid
« Last post by smarty12345 on October 17, 2018, 04:15:28 pm »
I have just tried this on a VM using NTFS mounts.
So in a nutshell. You can have only a single instance of a storage pool running via Flexraid. After the first is created the option to make more is greyed out.
the "raid" is totally separate in Expert mode however.
So unlike cruise control that will create a raid and pool all the disks in that raid, using expert mode you can create a single pool from any number of the disks you have, and exclude others. And then configure a raid over any selection of disks you want too.
I believe you can set up multiple raids of different disks. Though I think that could get messy.  But you are limited to only a single initialized pool. IF you want more than one pool you will probably have to look and dedicated pooling software. 
5
Snapshot RAID / Re: Confused - how to make snapshot raid
« Last post by artroom on October 16, 2018, 04:18:18 pm »
Thanks again Smarty...
So, I have to create a second pool and then add the snapshot raid to the same drive paths used to make that pool?
I thought a raid merged the disks as one, is this not what flexraid does for a snapshot raid? It has to be done in two separate parts?
If that is the case, can you make a pool of all your drives, but choose to only snapshot raid some of them?

I tried to create a pool from those disks but when I go to Add New Configuration, the only option it will let me choose is another Snapshot Raid. Is Flexraid only able to create one storage pool, but unlimited snapshot raids? That does seem very odd.

6
Snapshot RAID / Re: Confused - how to make snapshot raid
« Last post by smarty12345 on October 16, 2018, 01:51:29 pm »
Read these :
http://wiki.flexraid.com/2011/08/23/setting-up-the-storage-pool/
http://wiki.flexraid.com/2011/08/23/setting-up-your-snapshot-raid/

From reading those, what you want to do should be possible. But you would need to do it from NTFS folder mount points and not from drive letters.
As that way you can still have the mounts directed to a pool or a raid-F setup or both, and not have all the drives showing up separately in My computer with drive letters.

7
Snapshot RAID / Confused - how to make snapshot raid
« Last post by artroom on October 16, 2018, 02:42:12 am »
Sorry if I've missed something obvious here, but I've been going round in circles for days trying to figure this out.

I've had a Cruise Control raid running successfully for year made of 4 drives. I then wanted to add 2 drives as a separate Storage Pool. As you can't do that with a Cruise Control set up, I deleted the cruise control and created an Expert Mode Snapshot of the original 4 drives and recreated the PPU (it kept erroring if I tried to reuse the existing PPU), and a Storage Pool for the 2 new drives.

The Storage Pool is working fine and shows as T Drive: FlexRAID Storage Pool.
However the Snapshot Raid doesn't seem to have done anything. The 4 drives still just show as individual drives in Windows.

What am I missing to get these 4 drives to show as one, like it did before in Cruise Control?
thanks
8
Storage Pooling / Re: Cant select option to create Storage Pool
« Last post by artroom on October 15, 2018, 06:25:39 am »
I don't have the time. money or desire to overhaul my whole setup like I really want to, so for now will stick with it...until a problem or need arises.
I've never had to recover anything so no idea if I'll have problems.
It is recreating the raid now. I have to recreate the PPU as it just wouldn't do it using the existing parity data.
I have always found support sorely lacking (for a paid product) so not surprising it is a reason people abandon it.
9
Storage Pooling / Re: Cant select option to create Storage Pool
« Last post by smarty12345 on October 15, 2018, 06:00:05 am »
Thanks Smarty

So iI presume it is possible/safe to recreate the existing 4 drive raid done in cruise control in expert mode without any data loss?

If there is nothing wrong with your drives or data already then it would be safe to do so. The question really is if your going to do that, should you stick with flexraid. As from what I have seen on the forum over the last year or so is that most people have stopped using it (including myself) due to data recovery issues, corrupted files, no support and licencing issues with reinstalled or new systems.
10
Storage Pooling / Re: Cant select option to create Storage Pool
« Last post by artroom on October 14, 2018, 04:46:17 pm »
Thanks Smarty

So iI presume it is possible/safe to recreate the existing 4 drive raid done in cruise control in expert mode without any data loss?
Pages: [1] 2 3 ... 10