Re: Long test taking ages

On 2016-10-08 09:15, Gandalf Corvotempesta wrote:
> Hi to all
> I have a server with scheduled SMART background long test every
> saturday at 03 AM
> This server has only 4 300GB SAS 15K disks.
> 
> The smart long test is taking ages and making very high load on server
> (iowait more than 30)


Hi,

I'm just a user, but I think I can answer some of your doubts.

The test runs completely inside the hard disk, using its own code in the
disk firmware. Ie, smartmontools can start/stop the test, but has no
influence on what the test does or how.

The test is transparent, but does influence the operation of the disk,
making computer disk operation slower, and conversely, those operations
make the test slower. This is specially true while the disk is testing
for surface errors.

Thus you should program the long test to happen when the hard disk is
basically idle. Probably not all disks at the same time. Perhaps a
region of the disk at a time. It may be possible that different hard
disk brand handle differently.


Of your other questions, I can't say.


-- 
Cheers / Saludos,

		Carlos E. R.
		(from 13.1 x86_64 "Bottle" at Telcontar)

------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most 
engaging tech sites, SlashDot.org! http://sdm.link/slashdot

_______________________________________________
Smartmontools-support mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/smartmontools-support

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)

iEYEARECAAYFAlf49rcACgkQtTMYHG2NR9XFewCfa+jctBZhC4QGwx+Y31cZk2Bc
tmoAn2OvYzqSqtAaubZz21hNw8zkVeQC
=NyYC
-----END PGP SIGNATURE-----