libata and write cache

[Prakash K. Cheemplavam]

Hi,

I am just wondering how to enable write back caching with libata.

dmesg gives me

SCSI device sda: drive cache: write through

I would like to use the drive's wirte caching feature to improve 
performance /I know it is a bit dangerous with a flaky system).

Could anyeone tell me how to do it?

Thanks,

Prakash
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