Re: [PATCH 1/7] block: Add block_flush_device()

[Mark Lord]

Chris Mason wrote:
> You can test this pretty easily:
>
> dd if=/dev/zero of=foo bs=4k count=10000 oflag=direct
>
> If that runs faster than 1MB/s the write cache is still on.
..

Or simply:   hdparm -W /dev/sd?   ## (for SATA/PATA drives)
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