Re: Intel 520/530 SSD for ceph

[Stefan Priebe - Profihost AG <s.priebe@profihost.ag>]

Hi,

Am 21.11.2013 01:29, schrieb mdw@linuxbox.com:
> 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.

Firmware is up2date and all values are the same. I expect that the 520
firmware just ignores CMD_FLUSH commands and the 530 does not.

Greets,
Stefan