Re: SATA timeout value

[Russell Sloan <russell.sloan@lingua-data.com>]

I'm using SG_IO and I'm curently passing in:
  sg_io_hdr_t.timeout = 5;

This should be a 5 ms timeout, correct?  I've tried a few different values, from 5 to 1000 and it still takes 90+ seconds for it to timeout and return to my program.

I will try HDIO and see if that behaves any differently.



Russell Sloan wrote:
> Hi everyone,
> 
> Can someone point me to the area in the SATA code that is responsible
> for timing out while checking on a drive connection?
> 
> I have a drive that shuts its SATA interface down while it is doing a
> Security Erase, and then powers back up when it's done.  When I poll
> the drive asking for its status during the Erase, it is "not there"
> but the driver takes quite a while to report back.  I'd like to
> reduce the time that the driver spends checking for the drive.

What tool do you use to issue the query?  If the program uses SG_IO, the
timeout is specified by the program.  If it uses something else (one of
HDIO ioctls), timeouts are hardcoded in the ioctl functions in
libata-scsi.c - currently 10secs.

-- 
tejun
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