Re: Intel 520/530 SSD for ceph

[mdw-Jp3n8lUXroRWk0Htik3J/w@public.gmane.org]

On Tue, Nov 19, 2013 at 09:02:41AM +0100, Stefan Priebe wrote:
...
> >You might be able to vary this behavior by experimenting with sdparm,
> >smartctl or other tools, or possibly with different microcode in the drive.
> Which values or which settings do you think of?
...

Off-hand, I don't know.  Probably the first thing would be
to compare the configuration of your 520 & 530; anything that's
different is certainly worth investigating.

This should display all pages,
	sdparm --all --long /dev/sdX
the 520 only appears to have 3 pages, which can be fetched directly w/
	sdparm --page=ca --long /dev/sdX
	sdparm --page=co --long /dev/sdX
	sdparm --page=rw --long /dev/sdX

The sample machine I'm looking has an intel 520, and on ours,
most options show as 0 except for
  AWRE        1  [cha: n, def:  1]  Automatic write reallocation enabled
  WCE         1  [cha: y, def:  1]  Write cache enable
  DRA         1  [cha: n, def:  1]  Disable read ahead
  GLTSD       1  [cha: n, def:  1]  Global logging target save disable
  BTP        -1  [cha: n, def: -1]  Busy timeout period (100us)
  ESTCT      30  [cha: n, def: 30]  Extended self test completion time (sec)
Perhaps that's an interesting data point to compare with yours.

Figuring out if you have up-to-date intel firmware appears to require
burning and running an iso image from
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18455

The results of sdparm --page=<whatever> --long /dev/sdc
show the intel firmware, but this labels it better:
smartctl -i /dev/sdc
Our 520 has firmware "400i" loaded.

				-Marcus Watts