Only Seq Write performance is bad... Topic is solved

[disker]

There is a mysterious behaviour with our new Win7prof-64bit system, running Primo Ramdisk 5.6 standard for Temp-files. Please see attached screenshot. Seq/Write result does not depend on DIO or SCSI mode.

Config:
8x8=64 Gbyte Ram (Corsair DDR3-10700@667Mhz)
8 Gbyte Ramdisk in DIO mode
Win7prof-64-bit
Intel i7-3930k on MSI X79A-GD65(8D) mainboard, socket 2011LGA, Quad cannel

Why is Seq/Write performance as low as shown?
How to solve this issue?

[Support]

Seems quite weird...Did you test with other benchmark tools like AS SSD etc? And do you have the ramdisk settings?
Thanks.

[disker]

Ok, I did check with ASS SSD Benchmark (only SCSI mode supported...):


Difference between Seq/Read and Seq/Write are nearly the same...

Settings:

Code: Select all

[b]DIO:[/b]
Basic settings:
	Disk size: 8192 MB
	Disk type: Direct-IO
	Drive letter assigned: X
	One-time disk: No

Substance settings:
	Memory size: 8192 MB
	Memory features: -
	Drive file size: 0 MB
	Drive file name: -

File system settings:
	File system: NTFS
	Cluster size: Default
	Volume label: RAMDISK
	NTFS compression: No
	NTFS indexing: No
	Create "TEMP" folder: No

File system advanced settings:
	Custom folders: -
	Volume serial number: -
	Account "Everyone" permission: -

Image settings:
	Enable image file: No


[b]SCSI:[/b]
Basic settings:
	Disk size: 8192 MB
	Disk type: SCSI
	Drive letter assigned: X
	One-time disk: No

Substance settings:
	Memory size: 8192 MB
	Memory features: -
	Drive file size: 0 MB
	Drive file name: -

File system settings:
	File system: NTFS
	Cluster size: Default
	Volume label: RAMDISK
	NTFS compression: No
	NTFS indexing: No
	Create "TEMP" folder: No

File system advanced settings:
	Custom folders: -
	Volume serial number: -
	Account "Everyone" permission: -

Image settings:
	Enable image file: No

How to get full Seq/Write speed?
Thx...

[Support]

Hi disker,

Again, thank you for the information!

I am sorry that I have no idea on this issue so far. It is the first time that we see such testing results. I am not sure if this issue may be related to some third-party applications or system settins. If possible, could you test it on a clean Windows system and see the results?

Many thanks.

[disker]

For testing purpose:
Is it possible to install Primo Ramdisk on a on-the-fly booting system (usb or DVD) like LiveSystemPro?
http://www.kare-net.de/LiveSystempro-e.html

EDIT:
Yes, it is possible to install Primo Ramdisk on LiveDiskPro system, but benchmarking with CrystalDiskMark or ASS is not working...

So I did a clean install of Win7prof. 64bit Sp1 on a separate partition:
Primo Ramdisk 5.6 standard is running without any performance problems even on Seq/Write !!!
So hardware and bios settings seem to be working.

Are there known programs/ drivers with compatibility issues? Is there a list of not compatible programs?

EDIT-2:
Gdata Antivirus 2013 is the Seq/write performance killer. After uninstalling everything is running as expected.
It seems to be a specific Gdata problem. Avira Antivirus for example does not have this problem!
Support ticket to Gdata is opened.

[Support]

Hi disker,

I'm glad that you have already found the root cause. Thank you very much for your testings and information.

[disker]

There seems to be a bug fix for Gdata Antivirus 2013 (tested on WinXpSp3 and Win7Sp1-64bit):

Create a new registry entry in:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\GDMnIcpt\Parameters
DWORD_Wert(32-Bit)Name: ForceHashingFeature
Value: 0

Restart machine.

Normal ramdisk performance with Gdata-AV should be back...