[Bug 746262] Re: mkdosfs rounds reserved sectors to cluster size

[Babaei]

Confirmed. I ran into the same problem for the same reason (preparing a
CF for Xilinx SysACE).

I compiled the latest version of dosfstools (3.0.20) from source, and
the reserved sector functionality worked properly.

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https://bugs.launchpad.net/bugs/746262

Title:
  mkdosfs rounds reserved sectors to cluster size

Status in “dosfstools” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: dosfstools

  Some embedded devices require a FAT file-system with one, and only one reserved sector.
  Specifically this is documented at http://www.xilinx.com/support/answers/14456.htm

  mkdosfs.c lines 1060 and 1061 contains
      /* Adjust the reserved number of sectors for alignment */
      reserved_sectors = align_object(reserved_sectors, bs.cluster_size);

  This rounds the number of reserved sectors up to the cluster size, preventing the creation of only one reserved sector.
  Removing these two lines fixes the problem and returns the default number of reserved sectors to 1 for FAT12/16 and 32 for FAT32.

  Ubuntu 10.10
  dosfstools:
    Installed: 3.0.9-1
    Candidate: 3.0.9-1
    Version table:
   *** 3.0.9-1 0
          500 http://za.archive.ubuntu.com/ubuntu/ maverick/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: dosfstools 3.0.9-1 [modified: sbin/mkdosfs]
  ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
  Uname: Linux 2.6.35-28-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Thu Mar 31 09:17:27 2011
  ProcEnviron:
   SHELL=/bin/bash
   LANG=en_ZA.utf8
  SourcePackage: dosfstools

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