cdrom-detect fails when using usb storage as install device

Note: sda is the disk I am trying to install to.

This is not a duplicate of 104113. I do not have a CDROM device.

Hardware:

Dell Precision 380 with no 3 SATA HDD and no CD-ROM Drive

Exact same problem here, with both Ubuntu USB-Creator & Unetbootin

Work-around found by adding "cdrom-detect/try-usb=true" in Unetbootin "Tab" edit command-line screen

According to Bug 234185, this has been resolved for the 10.10 Release candidate _alternate_ CD (per Bug ), but I just confirmed that the problem still exists on the Ubuntu Server RC daily from Oct 5th. "cdrom-detect/try-usb=true" seems to work around it.

Thanks very much for the update Marc.

Kind Regards

Charlotte Rawlings
07791 848346

On 6 Oct 2010 00:15, "MarcRandolph" <email address hidden> wrote:

According to Bug 234185, this has been resolved for the 10.10 Release
candidate _alternate_ CD (per Bug ), but I just confirmed that the
problem still exists on the Ubuntu Server RC daily from Oct 5th.
"cdrom-detect/try-usb=true" seems to work around it.

** Changed in: cdrom-detect (Ubuntu)
  Importance: Undecided => Medium

** Changed in: cdrom-detect (Ubuntu)
      Status: New => Triaged

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cdrom-detect fails when using usb storage as install device
https://bugs.launchpad.net/bugs/582427
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of the bug.

Status in “cdrom-detect” package in Ubuntu: Triaged

Bug description:
Binary package hint: cdrom-detect

Steps to reproduce:

1. Take a Lucid alternate install CD
2. Transfer it to a USB flash drive using either USB creator or unetbootin
3. Boot it, configure keymap
4. Error: No cdrom device could be found

As requested, a syslog after uncommenting "set -x" in
/var/lib/dpkg/info/cdrom-detect.postinst is attached.

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https://bugs.launchpad.net/ubuntu/+source/cdrom-detect/+bug/582427/+subscribe

Ubuntu Server 10.10 release final still has the bug. "cdrom-detect/try-usb=true" suggested work around does not work with both Ubuntu USB-Creator & Unetbootin.

Tried on various machines both i386 and AMD64

related bug https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/234185

The "cdrom-detect/try-usb=true" functionality differs on different USB drivers. On my Kingston DATATraveler 1 GB it does not work at all, but on a Dane Elec 4 GB device it hangs later in the process (Failed loading installer components from CD).

I'am trying this on an INTEL D510MO installing Ubuntu 10.10 server release. Same problem using both Universal USB installer & Unetbootin from windows on a vFat usb stick.

11.04 fixes the issues in at least the the daily server x86_64 builds. I now only have a bug with booting afterwards, but this could be bios related and is an entirely diffrent bug

Hi Floren,

Thanks very much for your great work resolving this problem.

Kind Regards

Charlotte Rawlings
07791 848346

On 7 Dec 2010 16:42, "Floren van Olden" <email address hidden> wrote:

11.04 fixes the issues in at least the the daily server x86_64 builds. I
now only have a bug with booting afterwards, but this could be bios
related and is an entirely diffrent bug

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I still have the problem with apt when trying to install from a USB drive on the 11.04 daily build for x386 (not 64 bit). It copies all the files over then apt stats and cannot detect the CDROM.

Rob

Upstream claims this problem was fixed in cdrom-detect, so the remaining issue may be the 7-zip long file name problem that is described in Bug 234185 (i.e., you may not be able to certain utilities, such as UNetbootin). Rob, which "burning" utilities have you tried?

Hi Marc,

I was using UNetbootin.

Rob