1. Fdisk Unable To Write /dev/ Sda Bad File Descriptor Openssl
2. Fdisk Unable To Write /dev/ Sda Bad File Descriptor Printer

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Cmurf wrote:If Secure Boot is enabled, chainloading Windows won't work on either RHEL/CentOS/Fedora, or Canonical. I can't recommend disabling Secure Boot which leaves status quo with the firmware boot manager selection.Secure Boot isn't enabled on this pc.I've noticed that of the people who have resolved this issue on Centos 7 with win7/8, they all seem to be running Centos in legacy bios mode (at least according to their grub2.conf path). I would assume then that they are running both windows and centos in legacy mode. I've considered reinstalling Centos 7 in BIOS mode but if I try force BIOS mode by disabling UEFI prior to the installation I end up not being able to boot from my DVDR to do the installation. Is there another way to force CentOS 7 to use legacy BIOS?I've seen links to documentation on how to convert Windows 8 from BIOS mode to UEFI without reinstalling but I'm not sure this would get me any closer to a solution.Thanks for your help!

After a lot of reading on EFI it’s starting to make sense. I think the best solution is to:.

Fdisk Unable To Write /dev/ Sda Bad File Descriptor Openssl

Take a backup image of my Windows 8 (BIOS) SSD with CloneZilla. Create room on the Windows 8 SSD for an ESP. and enable Secure Boot. Reinstall CentOS7 to the other SSD, this time removing /boot/efi from the partition options and mounting the Windows 8 ESP at /boot/efi instead. I’m not sure if I will still need to install ntfs-3g and utils etc. Then and add Windows 8 to Grub2 afterwards, but that should be easy either way once EFI is setup in this way.

Fdisk Unable To Write /dev/ Sda Bad File Descriptor Printer

Update: The process I outlined above worked perfectly. I now have CentOS 7 and Windows 8 (both EFI) dual-booting with Secure Boot enabled. With separate SSD's I was unable to get CentOS to share windows' ESP as the installer refused to continue with that config. But each OS with their own small ESP worked flawlessly and ntfs-3g etc. Were not required as both ESP are fat32, so when I rebooted after the CentOS install the grub2 loader was pre-configured with both OS included and required no manual configuration by me.