z240 - very slow SSD Speed

[Patrick_Neuner]

Hello,

we just set up a few new z240 Workstations equipped with HP Micron M600 256GB SATA Gb/s SSDs and Samsung 840 PRO 256GB SSDs running latest Windows 10. When copying  VHDX Files (>100GB, M600 --> 840 Pro) I noticed extreme slowdowns of the Storage System - copy speed went down to 50MBs and lower IO Delay up to 2 Seconds and more ... see attached Screenshot.

When copying from M600 --> 840 Pro I get about 200MBs ... better but also not good for a SSD where I normally get 450-500MBs.

Already tried it with latest Intel Chipset Drivers and HP's Intel RST - SP78720 Drivers - no luck with both of them.

I'm running out of ideas why the Storage System is that slow ... and hope someone here can help me with this ...

thx, bye from Austria

Andreas Schnederle-Wagner

[Z440Roger]

Connect the SSD´s to the SATA III ports instead of the SATA II ports.

The Z420 has four SATA II ports and two SATA III ports. I think HP messed this up with the Zx20 series since the boot drives in a new computer are attached to the slower SATA II port while the DVD burner are connected to the SATA III port. Really odd imo.

I may be wrong, but my gut feeling says that both your SSD´s are connected to two of the four SATA II ports at the bottom of the motherboard. Connect them to the two SATA III ports. The DVD burner in you computer is connected to one of the SATA III ports, so just follow the cable from the DVD burner.

[Patrick_Neuner]

it they were Zx20 this would be a good guess - but the problem is with Z240 - so all 4 SATA Ports are 6 GB/s 😉

[MtothaJ]

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@Patrick_Neuner wrote:

Hello,

we just set up a few new z240 Workstations equipped with HP Micron M600 256GB SATA Gb/s SSDs and Samsung 840 PRO 256GB SSDs running latest Windows 10. When copying  VHDX Files (>100GB, M600 --> 840 Pro) I noticed extreme slowdowns of the Storage System - copy speed went down to 50MBs and lower IO Delay up to 2 Seconds and more ... see attached Screenshot.

When copying from M600 --> 840 Pro I get about 200MBs ... better but also not good for a SSD where I normally get 450-500MBs.

Already tried it with latest Intel Chipset Drivers and HP's Intel RST - SP78720 Drivers - no luck with both of them.

I'm running out of ideas why the Storage System is that slow ... and hope someone here can help me with this ...

thx, bye from Austria

Andreas Schnederle-Wagner

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Are you getting at any point a full SATA 3 500-600MB/s transfer speed e.g. at the begining of the copying process? If not then clearly there is a problem in the configuration / connection / sata cable / drivers etc.

If you are initially getting full speed but then it falls then with these large files there is always the matter of the SSD cache filling up, temperatures increasing and performance falling. If you have e.g. a Samsung 850 you can turn RAPID mode on and see if this helps somewhat.

[Patrick_Neuner]

Hi,

as one can see on the Screenshot - the M600 initially get's higher Transfer Speeds - but drops rather quick down to slow Rates ...

I'm mostly interested in the M600 slowdown as this is our System Drive ...

Andreas

[Z440Roger]

it they were Zx20 this would be a good guess - but the problem is with Z240 - so all 4 SATA Ports are 6 GB/s 😉

Oh, i guessed i missed that it was a Z240... I just read Z420... *blushing*