And this is why you use RAID5 instead of RAID0

[dfsdfgfkjsefoiqzemnd]

I was copying data from my SSD RAID array to my NAS while watching a movie from the same array, when suddenly the movie and the file transfer froze completely.  I couldn't even force-quit the player, even when trying to kill the process.

 

Upon hard-resetting the PC, I was greeted with this ...

 

 

Luckily it's a RAID5 array, so I lost no data.  Not that losing data would have been that big a deal, the array only stores temporary files and works in progress and is backed up on a daily basis.

However I now need to go to the store to get a replacement for the dead SSD. 

 

So there's 2 things to remember from this

1 ) even the 850PRO can suddenly die

2 ) always make sure you have redundancy

 

Actually there's a third point too

3 ) don't mount your SSDs in such a way that you need to remove the motherboard to get access to them. 

I just found that out the hard way.  Time to tear down half the PC. 

 

 

 

 

 

 

 

[Bananasplit_00]

i have a RAID 0 with a pair of 140GB HDDs, i dont have anything important on them but i am litteraly just sitting here waiting for that message lol

[tomaatvk]

I'm not saying that it's not a good idea to run raid 5 instead of raid 0, but making regular backups would mean that one of the drives crashing still doesn't result in any lost data.

[Enderman]

How did the 850 pro die?

Can you post a a screenshot of crystaldiskinfo when you fix your array and boot into windows again?

[dfsdfgfkjsefoiqzemnd]

28 minutes ago, Enderman said:

a screenshot of crystaldiskinfo

As they are now, same order as in the RAID screen :

ID 0 :

 

ID 1 :

 

ID 2 : (this is the one that threw up the error)

 

ID 3 :

 

Looking closer at it, I'm not seeing anything wrong with that drive really.  If I get SMART status, the drive obviously still works.  Looks like it has simply been kicked out of the array for some reason. 

 

Methinks I'm going to do a manual backup, format the drive, do a full disk check and if that goes well I'll try to rebuild the array.

[Enderman]

50 minutes ago, Captain Chaos said:

As they are now, same order as in the RAID screen :

ID 0 :

Looking closer at it, I'm not seeing anything wrong with that drive really.  If I get SMART status, the drive obviously still works.  Looks like it has simply been kicked out of the array for some reason. 

 

Methinks I'm going to do a manual backup, format the drive, do a full disk check and if that goes well I'll try to rebuild the array.

Yeah the drive is probably fine. I would be really surprised if an 850 pro actually died.

 

You can see that disk 2 has 16 CRC errors, which means there was an error during data transfer.

https://kb.acronis.com/content/9135

http://www.tomshardware.com/forum/269937-32-error-count-high-sata-controller-failing

 

This just looks like the raid array crapped out and made some mistake (like a flipped bit or something), which is pretty common when using motherboard raid instead of a professional raid card.

 

This is why I don't like raid, sometimes it just fails for no reason and you need to reinstall windows or load a backup.

[dfsdfgfkjsefoiqzemnd]

Completely failed to notice those CRC errors.  Tnx for pointing them out.  Looks like that might be the problem indeed.

 

Agreed on motherboard RAID, ever since I started using software RAID with ZFS in my NAS I started to dislike my PC's RAID setup TBH.   I'd almost get a single large SSD.  Almost. 

 

I'm going to connect that 850 to my other PC (I'd rather not take it out of this one, so I'll be hotwiring the whole thing) and have a long hard look at it. 

I'll probably end up formatting it and telling the RAID controller to resilver the array.  If the SSD throws another error, it's RMA time tho. 

 

That drive (and drive 3) has been in use since 01/2015.  If it had a 2 year warranty, I'd RMA it right away because it's so close to that deadline.  However the PRO comes with 10 years or 150TB, so there's plenty of time to find out if this was just a one-time error or if it's a real problem.