How to troubleshoot slow fedora-wait-storage.service?

[Andy Lawrence]

My system is a fresh F16rc3, XFCE all updates on a fast Sandy Bridge and
SSD, check out my super long boot delay below.  How do I troubleshoot this
to see what is going wrong?

6469ms fedora-wait-storage.service

Long files don't show anything interesting to me.

Thanks
Andy

[Michał Piotrowski]

Hi,

2011/9/30 Andy Lawrence <dr.diesel(a)gmail.com&gt;:
>  My system is a fresh F16rc3, XFCE all updates on a fast Sandy Bridge
> and
>  SSD, check out my super long boot delay below.  How do I troubleshoot this
>  to see what is going wrong?
>  6469ms fedora-wait-storage.service 
ExecStart=-/sbin/rmmod scsi_wait_scan
ExecStart=-/sbin/modprobe scsi_wait_scan
ExecStart=-/sbin/rmmod scsi_wait_scan

It seems that removing/loading/removing scsi_wait_scan module takes
some time on your system. This could be a kernel or hardware specific
problem.

>  Long files don't show anything interesting to me. 
How about dmesg?

>  Thanks
>  Andy
>
>
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Best regards,
Michal

http://eventhorizon.pl/

[Andy Lawrence]

2011/9/30 Michał Piotrowski <mkkp4x4(a)gmail.com&gt;

>  Hi,
>
>  2011/9/30 Andy Lawrence <dr.diesel(a)gmail.com&gt;:
>  > My system is a fresh F16rc3, XFCE all updates on a fast Sandy Bridge and
>  > SSD, check out my super long boot delay below.  How do I troubleshoot
>  this
>  > to see what is going wrong?
>  > 6469ms fedora-wait-storage.service
>
>  ExecStart=-/sbin/rmmod scsi_wait_scan
>  ExecStart=-/sbin/modprobe scsi_wait_scan
>  ExecStart=-/sbin/rmmod scsi_wait_scan
>
>  It seems that removing/loading/removing scsi_wait_scan module takes
>  some time on your system. This could be a kernel or hardware specific
>  problem.
>
>  > Long files don't show anything interesting to me.
>
>  How about dmesg?
>
>  > Thanks
>  > Andy
>  >
>  >
>  
Thanks for the help!  It appears scsi_wait_scan isn't even getting loaded as
lsmod doesn't show it.  I moved the
file /lib/systemd/system/fedora-wait-storage.service out of the way, for
some reason you can't disable that particular service.  Anyhow the delay is
gone, woohoo!

I searched all the log files including dmesg, didn't see anything but I
could have easily missed it.  I also grep'ed for scsi_wait_scan in all with
no results.  Once booted that module loads instantly, I'll test more later
now that I know what is causing it!

Many thanks

[drago01]

On Fri, Sep 30, 2011 at 10:15 PM, Andy Lawrence <dr.diesel(a)gmail.com&gt; wrote:
>  Thanks for the help!  It appears scsi_wait_scan isn't even getting loaded as
>  lsmod doesn't show it.  I moved the
>  file /lib/systemd/system/fedora-wait-storage.service out of the way, for
>  some reason you can't disable that particular service.  Anyhow the delay is
>  gone, woohoo! 
systemctl mask fedora-wait-storage.service .. in 90% of the cases you
simply don't need it anyway.