ntdll error and low ssd IOPS

[rowandg]

Hi,

I had a project on playback when the ntdll error suddenly pops up.

A side effect of this seems to be that the IOPS random read/write of my two Samsung 840 EVO ssds is extremely low. Causing a huge performance drop and not being able to handle Reaper projects real-time playback anymore.

What could have happened?

Greets

[EvilDragon]

EVO 840 SSDs have a known issue with this... do a bit of googling around. This is not really a Reaper bug.

[rowandg]

Originally Posted by EvilDragon

EVO 840 SSDs have a known issue with this... do a bit of googling around. This is not really a Reaper bug.

Thanks for your reply. I tried Google, but unable to find anything to do with my error? Could you be so kind in helping me in the right direction?

[EvilDragon]

I'm not talking about ntdll error, rather low IOPS count you're experiencing. That's a known technical flaw with 840 Evo that needs a firmware update. Google "evo 840 iops low".

[rowandg]

Thanks. My EVO's are already up to date. They have been working OK for 2 years now. This error that suddenly produces low IOPS has now occured for the second time in 4 months.

[EvilDragon]

I would contact Samsung support then!

[rowandg]

Originally Posted by EvilDragon

I would contact Samsung support then!

0. Laptop works fine.
1. SSD's work fine.
2. Reaper works fine.
3. Reaper produces ntdll error.
4. SSD's IOPS is extremely low.

This problem is produced by Reaper, not Samsung.

[karbomusic]

Originally Posted by rowandg

0. Laptop works fine.
1. SSD's work fine.
2. Reaper works fine.
3. Reaper produces ntdll error.
4. SSD's IOPS is extremely low.

This problem is produced by Reaper, not Samsung.

Well then IOPS should only be slow with Reaper - just how are you measuring "IOPs"? What does perfmon's disk counters say about IOPs?

Secondly, we can't combine IOPs and NTDLL error without a clear link/datapoint. What is the exact NTDLL error, what do the system event logs say and so on. I think there is missing information here.

[rowandg]

Thanks Karbo.

Event details:

15:19

reaper.exe
5.3.0.0
5856ad8f
ntdll.dll
10.0.14393.479
5825887f
c0000374
00000000000f8283
21f8
01d26d9a97321a9a
C:\Program Files\REAPER (x64)\reaper.exe
C:\Windows\SYSTEM32\ntdll.dll
db683233-a227-4e78-a744-64d9f3fa32e1

Immediately the SSD's IOPs (measured with Samsung Magician) and thus overall laptop performance is lowered.

[karbomusic]

Does this occur with a new project and zero VSTs? Since the parameter names aren't included above, I'm guessing at the exception code...

This looks like a heap corruption issue causing a crash but not 100% sure. It has no direct link to IOPs but even if there is some secondary like side effect, the more important piece is the reason for the crash:

C:\WINDOWS\system32>err c0000374
# for hex 0xc0000374 / decimal -1073740940
STATUS_HEAP_CORRUPTION ntstatus.h
# A heap has been corrupted.
# 1 matches found for "c0000374"

For the geeky guys (ED?), download this and throw it in your system32 folder. It contains the error code lookups for all of windows and is quite handy - Ignore the exchange server reference, that's irrelevant:

https://www.microsoft.com/en-us/down...ls.aspx?id=985

[rowandg]

Thanks all for the replies.

I'm guessing what happened is Reaper getting the SSD real hot (over 70 degrees celsius) and it's throttling itself.

It indeed seems very unlikely that Reaper is the cause, but more of a coincidence it got involved.

I'll try relocating the ssd to a more temperature friendly position in the laptop.

Thanks for the help!

[EvilDragon]

My best advice would be sell them and get 850 Pro. Just so much better and less issues. Also thermal throttles better.

[rowandg]

Originally Posted by EvilDragon

My best advice would be sell them and get 850 Pro. Just so much better and less issues. Also thermal throttles better.

Thanks for the advice. Will do in the future.

I bought an mSATA > SATA 2.5" adapter and put the 840 in my DVD-drive slot. Temps dropped to 42 degrees celcius Downside is it is on a SATA2 port instead of 3, but shouldn't notice any difference.

[EvilDragon]

You probably will, since that SSD won't reach its full speeds over SATA2.

[rowandg]

Originally Posted by EvilDragon

You probably will, since that SSD won't reach its full speeds over SATA2.

True, but for an OS/Programs disk I cannot think of any situation that maxes out said speed.

[EvilDragon]

Possibly. But if you're recording lots to it, you might notice. Or if you use some heavy Kontakt libraries, streaming tons of samples from a drive... you'd get dropouts sooner.