Disk Cache Policy LSI

it:Criteri di Cache del disco LSI pt:Diretiva de Cache de disco LSI es:Directiva de caché de disco LSI fr:Disk Cache Policy LSI

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Introduction

Enabling or disabling the disk cache policy with a LSI Raid card (Avago ) under Linux.

Place

To enable or disable disk cache policy, we must perform the procedure below. By default, LSI (Avago) Let the cache disk policy enabled the Raid for 0 - Stripping. Reminder, the activation of the cache provides a performance gain but also a risk of corruption of data in the event of loss of power from Server.

Here are the commands to perform :

1. CD /usr/local/src
2. wget http://mirror02.ikoula.com/priv/binaries/raid/lsiutil/lsiutil.x86_64
3. chmod +x lsiutil.x 86_64
4. ./lsiutil.x86_64

Select the raid card concerned :

Then, choose the option 21. RAID action :

Go to the option 32. Change volume settings:

The question Write Caching, select "0" to disable the cache disk policy or "1" to activate :

Finish by testing that it is enabled. Why redo the option 21 Then 32:

We can see above the write cache is now enabled.

Conclusion

We just modify the cache disk e policy by enabling or disabling the option disk write cache. For a gain in performance, so it's important to do it after creating a raid 1 (Mirroring ). This procedure works in Linux Debian and Centos.

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