Notes: Preparing for RHCSA & RHCE 1

Partitioning

Supported tools:

• MBR disks: fdisk
• GPT disks: gdisk

To force the Red Hat installer to use GPT, add inst.gpt to the kernel commandline.

Don't convert MBR partitions of a boot-disk to GPT, grub2 will fail to locate stage2 of the boot image.

KB: base-10 (1000x1000)
KiB: base-2 (1024x1024)

fdisk

• fdisk saves partition info in MBR => first 512 bytes of disk

gdisk

• GUID disk identifier
• gdisk saves partition metadata in first MB and a backup in last MB
• 128 possible partition entries
• Shows 2048 sector boundaries => optimal 1MiB rounding for optimal performance

Update kernel partition info

• partprobe
• partition size adjustments: reboot