[Bug 441301] Re: update-grub reports error on inexistant device

[dino99]

outdated report & no more maintained distro; please send a new one if
that issue still exist (using ubuntu-bug)

** Changed in: grub (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/441301

Title:
  update-grub reports error on inexistant device

Status in grub package in Ubuntu:
  Invalid

Bug description:
  Binary package hint: grub

  Executing `sudo update-grub` will report error: "error: cannot open `/dev/sdc' while attempting to get disk size"
   many times.

  Full output:
  $ sudo update-grub
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  Generating grub.cfg ...
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  Found linux image: /boot/vmlinuz-2.6.31-11-generic
  Found initrd image: /boot/initrd.img-2.6.31-11-generic
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  Found memtest86+ image: /boot/memtest86+.bin
  Found Windows 7 (loader) on /dev/sda1
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  error: cannot open `/dev/sdc' while attempting to get disk size
  done

  However grub.cfg is correctly created and boot give no problems...

  $ sudo fdisk -l

  Disco /dev/sda: 320.1 GB, 320072933376 byte
  255 testine, 63 settori/tracce, 38913 cilindri
  Unità = cilindri di 16065 * 512 = 8225280 byte
  Identificativo disco: 0xfaaca98d

  Dispositivo Boot      Start         End      Blocks   Id  System
  /dev/sda1   *           1          13      102400    7  HPFS/NTFS
  La partizione 1 non termina al limite del cilindro.
  /dev/sda2              13       12749   102297600    7  HPFS/NTFS
  /dev/sda3           12750       38913   210162330    5  Esteso
  /dev/sda5           12750       24906    97651071   83  Linux
  /dev/sda6           24907       38305   107627436   83  Linux
  /dev/sda7           38306       38913     4883728+  82  Linux swap / Solaris

  Disco /dev/sdb: 1000.2 GB, 1000204886016 byte
  255 testine, 63 settori/tracce, 121601 cilindri
  Unità = cilindri di 16065 * 512 = 8225280 byte
  Identificativo disco: 0x00036009

  Dispositivo Boot      Start         End      Blocks   Id  System
  /dev/sdb1               1      121601   976760001   83  Linux

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