[Bug 278176] Re: disk detection is real slow with some hardware (timout shell drops)

[Phillip Susi]

You can change the timeout if you have unusual hardware that needs
longer, so I don't think we're going to change the default since it
works for the vast majority of machines.  There are also other bugs
already about how mdadm handles degraded activation, so I'm closing that
task too.  If there is particular hardware that seems to take longer
than it should to scan that may be a driver problem, we might look into
that.  Please attach /var/log/kern.log.


** Changed in: initramfs-tools (Ubuntu)
       Status: Confirmed => Won't Fix

** Changed in: mdadm (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/278176

Title:
  disk detection is real slow with some hardware (timout shell drops)

Status in “initramfs-tools” package in Ubuntu:
  Won't Fix
Status in “linux” package in Ubuntu:
  Incomplete
Status in “mdadm” package in Ubuntu:
  Invalid
Status in “mountall” package in Ubuntu:
  Invalid

Bug description:
  I have installed Intrepid server i386 beta on a Dell PowerEdge 600SC.
  Everything seemed to install fine but upon boot it always drops into
  the BusyBox shell. The RAID is *not* degraded. At the BusyBox prompt
  if I type 'exit' it will proceed to boot normally and both RAID1
  drives show healthy with all members. I have tried the install twice.

  
  This has shown to be a timeout issue with slow hardware.

  * initramfs: Default rootdelay may need to be larger and event driven
  upstart used.

  * linux: The long delay may have its cause here.

  * mdadm: As RAIDs may take minutes until they come up, but regular ones are quick, this should be handled nicely:
  * This functionality is similar to and could most easily be added with upstart events (the temporary tool) mountall:

        "NOTICE: /dev/mdX required for the root filesystem didn't get up
  within the last 10 seconds.

        We continue to wait up to a total of xxx seconds complying to the ATA spec
        before attempting to start the array degraded.
        (You can lower this timeout by setting the rootdelay= parameter.)

        <countdown> seconds to go.

        Press [ESC] to stop waiting and to enter a rescue shell.


  * see https://wiki.ubuntu.com/ReliableRaid

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