Re: [PATCH] scsi/sata write barrier support

[Doug Maxey]

On Thu, 27 Jan 2005 13:02:48 +0100, Jens Axboe wrote:
>Hi,
>
>For the longest time, only the old PATA drivers supported barrier writes
>with journalled file systems. This patch adds support for the same type
>of cache flushing barriers that PATA uses for SCSI, to be utilized with
>libata. 

What, if any mechanism supports changing the underlying write cache?  

That is, assuming this is common across PATA and SCSI drives, and it is 
possible to turn the cache off on the IDE drives, would switching the 
cache underneath require completing the inflight IO?

++doug



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