Forum - RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ???

#16 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Sat Jan 03, 2015 9:49 pm

Well there is unreliable info about TRIM passing through with RAID0 and maybe RST Enterprise now allows TRIM passthrough.

For RAID5, it's performance wasn't as bad, I can get over 100 MB/s write. I am doing a defrag and we will see. My device is write-once read-many on the R5 array so I don't mind if write performance isn't superb.

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#17 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Tue Jan 06, 2015 9:37 am

I've read trim is not available for raid1 with RST and SSD, possible the drives are not doing their own garbage collection and the cells are filling up?

Trim does pass through with RST and raid0, this has been confirmed by Intel quite a few versions ago.

It also would appear that latest gen like 850 evo and mx100 you lose about 10% bandwidth without trim and those models have their own garbage collection.
That should keep them in top performance.

I currently run raid1 on raptors but would love to update to Samsung 850's, just not keen on the whole trim issue.

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#18 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Tue Jan 06, 2015 6:41 pm

Zitat von ep0x92 im Beitrag #17
I've read trim is not available for raid1 with RST and SSD, possible the drives are not doing their own garbage collection and the cells are filling up?

Trim does pass through with RST and raid0, this has been confirmed by Intel quite a few versions ago.

It also would appear that latest gen like 850 evo and mx100 you lose about 10% bandwidth without trim and those models have their own garbage collection.
That should keep them in top performance.

I currently run raid1 on raptors but would love to update to Samsung 850's, just not keen on the whole trim issue.

I've reconfigured my system to not download to the desktop and really limit my unnecessary write/delete on the SSD array. Until Intel allows this pass-through, I wouldn't recommend this approach. I'll probably quarterly trim the SSDs manually and hope Intel provides this functionality. Fortunately, this is an HTPC and C_Drive write performance isn't a production issue, just an annoyance.

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#19 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 1:52 pm

I don't want to veer off topic, but I'm getting relatively low burst speed with my ICH8 and the recommended 11.2.0.1006/11.2.0.1527 driver/bios:

Is it necessary to install Intel Matrix Sotrage Manager and enable write-back cache?

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#20 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 2:02 pm

Zitat von mockingbird im Beitrag #19
Is it necessary to install Intel Matrix Sotrage Manager and enable write-back cache?

Yes, if you want to enable the Write-Back Caching feature, I recommend to install the modded "Universal Intel RST Drivers and Software Set v11.2.0.1006. Note: Before you run the installer, you have to make sure, that the required .NET Framework v3.5 is installed.
After the next reboot you should run the Console software v11.2.0.1006 and enable the Write-Back Caching. If you want, you can uninstall the RST software - the Write-Back Caching setting will stay forever (unless you break the RAID array or do a serure erase of the RAID members).

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#21 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 2:31 pm

I installed it, but I don't see any option in the software for enabling it. I already had write caching enabled in device manager in the hard drive properties:

After installing, I got the same burst rate. Any other suggestions?

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#22 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 2:43 pm

Apparently there's supposed to be a "Performace" section in the program, but I don't have it:

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#23 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 2:50 pm

Zitat von mockingbird im Beitrag #22
Apparently there's supposed to be a "Performace" section in the program, but I don't have it:

Hit the "Manage" tab. There you will find the option to enable the Write-Back Caching.

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MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
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#24 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 3:02 pm

Can you point it out to me please? I can't see it...

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#25 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 10:24 pm

I want to add that I'm not in RAID mode, but only AHCI, but it should still allow me to enable write-back caching. I should be getting 200MB+ burst speed.

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#26 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Wed Jan 07, 2015 10:28 pm (Last edited: Wed Jan 07, 2015 10:35 pm)

Zitat von mockingbird im Beitrag #25
I want to add that I'm not in RAID mode, but only AHCI, but it should still allow me to enable write-back caching.

No, the ability to set the Write-Back Caching to "Enabled" is only available, if the Intel SATA Controller has been set to "RAID".
The "normal" Write Caching" can be enabled for all disk drives from within the Device Manager.

EDIT:
If you don't have a RAID system, why did you post your problem into this thread (please read your post titles)?
Furthermore I would like to know, why you are running the Intel RST driver v11.2.0.1006. This is absolutely not the best AHCI driver.

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
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#27 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Thu Jan 08, 2015 2:35 am (Last edited: Thu Jan 08, 2015 9:17 am)

Because the thread was about low rates. Shall I start a new thread?

You told me to use the ROM/Driver combo. From >this< thread:

Zitat
Recommended for all AHCI/RAID users with an Intel Southbridge from ICH7R/M up, usable with XP, Vista, Win7 and Win8.
Best suitable Intel RAID ROM: v11.2.0.1527

I'm going to go run some benchmarks on my ICH10 system where I can set it as "RAID" in the BIOS.

EDIT by Fernando: Link corrected

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#28 | RE: Intel RST Write Performance Has Fallen Off - Dual SSD RAID1, Writes at 40 MB/s, Reads at 700 ??? datum

Thu Jan 08, 2015 9:22 am

Zitat von mockingbird im Beitrag #27
Because the thread was about low rates. Shall I start a new thread?

Yes. After you have done that, I will move our conversation into the new thread.

My current System:
MB: ASRock X570 Pro4, CPU: AMD Ryzen 5 3600, System Drive: 500 GB Samsung 980 Pro, Graphics: Sapphire Radeon RX570, OS: Win10 x64 Pro
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