Messages in this thread | | | Date | Mon, 30 Mar 2009 16:40:39 -0400 | From | Mark Lord <> | Subject | Re: Linux 2.6.29 |
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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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