Hi, I'm slightly lost :) I have Dell laptop Precision M6500, it has PM55 chipset. I have two SSDs in RAID0. There is Intel Matrix Storage Manager 8.9.5. Also, I recently updated Intel Rapid Storage Technology to 13.6.0.1002 ... enabling Write Back cache mode seems to help significantly.

However, I'd like to enable TRIM and after reading relatively lot of posts here, I'm still not sure what to do exactly :) The BIOS just says it is "Dell". Can you please provide me with some advice?

Thank you!

Jaroslav

Hi Fernando,

thank you for the answer.

Zitat

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For your P55 chipset system with an old MSM RAID ROM module within the BIOS it would have been better to take the "classical" Intel RST driver v11.2.0.1006 WHQL.

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Are there some disadvantages when I use the newer RST? The new one allows me to switch on write back cache, which speeds up the "4K write" very significantly. The old one didn't have this possibility (not 100% sure about the old version now).

Zitat

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The best choice for your system would be the "Universally TRIM modified" Intel RST RAID ROM v11.2.0.1527 with TRIM in RAID0 support

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Thanks. I'll try it in the evening and write here if it worked :)

Best regards,

Jaroslav

Zitat von Fernando im Beitrag #666

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None of the latest Intel RST(e) drivers have been designed for P55 chipset systems. Furthermore you will get the best RAID0 performance, if you are using the latest "classical" Intel RST driver v11.2.0.1006 in combination with the matching Intel RAID ROM v11.2.0.1527

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Zitat von Fernando

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Zitat von Jaroslav

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Also, I have PM55, not P55 (mobile chipset). Do I understand correctly that it does not make a difference that has to be taken into account?

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Yes, it does not make a difference.

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Fine. I have another question :) The laptop is big and heavy... and I can put 4 SSDs into it! However, the chipset officially support only two drives in RAID. Is there another trick to make it working with three or even four drives?

EDIT by Fernando: Quoting format corrected

Thanks. I would like to try it anyway if it was possible :)

Zitat von Fernando

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1. You will not get much benefit regarding the performance (a RAID0 array with 3 SSD members will already reach the maximum possible speed).

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The laptop has only SATA 2. So with two SSDs, I have only 500MB/s. So with 4 SSDs, I could reach 1000MB/s

Zitat von Fernando

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2. A connection of 2 more SSDs will enhance the power consumption of your laptop enormously. So the storage battery will be empty very soon.

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The laptop is heavy, consuming too much anyway, so I use it more as a desktop. I have these 4 SSDs there already anyway.

Zitat von Fernando

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3. The risk of an SSD failure and loss of all data will be doubled.

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I'm not afraid. I use SSDs for about 7 - 8 years, no failure so far. I have double backup.

It woul be really great to have such configuration. Maybe someone will read this in the future and provide some hack ...

Hi, I'm sorry, but I'm still lost.
I got the Dell BIOS. I'm able to extract the .hdr file using PhoenixTool (or get the .rom file by calling the Dell .exe file with -writeromfile option). However, cbrom "extracted_file" /D just hangs and does nothing.
Would you be please so kind and help me? How should I continue?
Attached find the original Dell file.

Thank you!

J.

So another try...

Thanks!