lkml.org 
[lkml]   [2012]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: ata4.00: failed to get Identify Device Data, Emask 0x1
Date
> Agree. If NCQ does not imply support of this log page, we should
> definitely refine the check condition used here.
>
> I suppose Shane will take care of this, but if he doesn't, I'll do that
> at a later time.

I tried word 78 bit 5(Hardware Feature Control) which does not work,
it is 0 on my HDD sample with log 30h page 08h and DevSlp supported.

Seems that word 78 bit 5 is only the sufficient condition, not the
essential condition. Do you guys have suggestion?

Quoting SATA spec:
> Word 78: Serial ATA features supported
> Bit 5 If bit 5 is set to one, then Hardware Feature Control is
> supported (see 13.10). If bit 5 is cleared to zero, then Hardware
> Feature Control is not supported and IDENTIFY DEVICE data
> word 79 bit 5 shall be cleared to zero.
>
> If Hardware Feature Control is supported, then:
> a) IDENTIFY DEVICE data word 78 bit 5 (see 13.2.1.18) shall be
> set to one;
> b) the SET FEATURES Select Hardware Feature Control subcommand
> shall be supported (see 13.3.8);
> c) page 08h of the Identify Device Data log (see 13.7.7) shall
> be supported;


Thanks,
Shane



\
 
 \ /
  Last update: 2012-10-18 12:21    [W:0.055 / U:2.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site