Re: Linux 2.6.29
From: Mark Lord
Date: Mon Mar 30 2009 - 16:40:53 EST
Jeff Garzik wrote:
Mark Lord wrote:
Michael Tokarev wrote:
But are there drives out there that actually supports FUA?
..
Most (or all?) current model Hitachi Deskstar drives have it.
Depends on your source of information: if you judge from probe
messages, libata_fua==0 will imply !FUA-support.
..
As your other post points out, lots of drives already support FUA,
but libata deliberately disables it by default (due to the performance
impact, similar to mounting a f/s with -osync).
For the curious, you can use this command to see if your hardware has FUA:
hdparm -I /dev/sd? | grep FUA
It will show lines like this for the drives that support it:
* WRITE_{DMA|MULTIPLE}_FUA_EXT
Cheers
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