[SunHELP] FW: Sol9 md-error: B_FAILFAST I/O disabled

[stephen price]

Keyword(s):md_mirror, B_FAILFAST, message, FailFast,
RAID5, metadevice

Problem Statement: Top 

The following messages are seen:

  md_mirror: NOTICE: md: d1: B_FAILFAST I/O disabled
  md_mirror: NOTICE: md: d2: B_FAILFAST I/O disabled
  md_mirror: NOTICE: md: d3: B_FAILFAST I/O disabled
  md_mirror: NOTICE: md: d4: B_FAILFAST I/O disabled
  md_mirror: NOTICE: md: d5: B_FAILFAST I/O disabled

What are these trying to tell me?

Resolution: Top 

These are not errors. These are informational (NOTICE)
messages
telling you that the driver underlying your
metadevices does not
support the B_FAILFAST option and, as a result, that
capability will
not be active for speedier recovery. There is no way
to disable these
messages.

One reason you would get this informational message is
if the disk
driver doesn't have failfast support
(ddi-failfast-supported property
not defined in the driver).

These messages, if printed, can be printed whenever a
driver reloads. 
Typically, that is when the system boots, but can also
occur more
infrequently at other times once the system is up and
running.

FYI: What is failfast support? In a nutshell, it
allows for the driver
to fail an underlying disk device "faster" than normal
if the device is
part of a redundant (mirrored or RAID5) metadevice.

FailFast support was added to the Solaris 'sd' and
'ssd' drivers in a
patch on Solaris[TM] 8 and 9. If you are using one or
both of these
drivers, you should upgrade to the latest version of
the patch to get
the failfast support.

To determine if any of the drivers on the system have
failfast support,
you can run:

       # prtconf -vP | grep ddi-failfast-supported

of course, you will have to look at the actual output
of the 'prtconf
-vP' command to see what drivers have the
'ddi-faildast-supported' flag
turned on.

At the time this doc was written, no failfast support
existed on x86
versions of Solaris 8 or 9.


--- Michael Karl <mk at lexcom-net.de> wrote:
> Hi,
> 
> I still have the following problem.
> 
> Here there should be a solution:
> http://forum.sun.com/thread.jspa?threadID=23563
> 
> ... arggh, I have no access :-(
> 
> Could anyone help me, please ;-)
> 
> Best regards 
> Michael
> 
> ------ Weitergeleitete Nachricht
> Von: Michael Karl <mk at lexcom-net.de>
> Antworten an: The SunHELP List <sunhelp at sunhelp.org>
> Datum: Tue, 14 Sep 2004 00:01:30 +0200
> An: <sunhelp at sunhelp.org>
> Betreff: [SunHELP] Sol9 md-error: B_FAILFAST I/O
> disabled
> 
> Hello,
> 
> I get this errors during startup Solaris 9:
> 
> .
> .
> .
> Sep 13 23:40:57 UE10 genunix: [ID 936769 kern.info]
> dad1 is
> /pci at 1f,0/pci at 1,1/ide at 3/dad at 2,0
> Sep 13 23:40:57 UE10 dada: [ID 365881 kern.info]    
> <IBM-Deskstar-180GXP
> cyl 65535 alt 2 hd 12 sec 341>
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d60:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d40:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d70:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d72:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d50:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d52:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 md_mirror: [ID 437521
> kern.info] NOTICE: md: d100:
> B_FAILFAST I/O disabled
> Sep 13 23:40:58 UE10 last message repeated 1 time
> Sep 13 23:40:58 UE10 swapgeneric: [ID 308332
> kern.info] root on
> /pseudo/md at 0:0,0,blk fstype ufs
> .
> .
> .
> 
> Any hints ...
> 
> Thanks
> 
> Michael
> _______________________________________________
> SunHELP maillist  -  SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
> 
> ------ Ende der weitergeleiteten Nachricht
> _______________________________________________
> SunHELP maillist  -  SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
> 

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