On Sun, 2013-04-07 at 14:29 +0800, Jov wrote:
> from the pg doc：
> http://www.postgresql.org/docs/devel/static/wal-reliability.html :On Linux,
> IDE drives can be queried using hdparm -I; write caching is enabled if
> there is a * next to Write cache. hdparm -W 0 can be used to turn off write
> caching. SCSI drives can be queried using
> sdparm<http://sg.danny.cz/sg/sdparm.html>.
> Use sdparm --get=WCE to check whether the write cache is enabled and sdparm
> --clear=WCE to disable it.
>
> from the hdparm man page :
> http://linux.die.net/man/8/hdparm :hdparm - get/set SATA/IDE device
> parameters
>
> so,the doc is out date, it should mention hdparm also support SATA.
done