Shubham Tech blogs

  BIOS vs. UEFI: Boot System Comparison When a computer starts, it needs firmware to initialize hardware and boot the OS. There are two main types of firmware: BIOS (Basic Input/Output System) and UEFI (Unified Extensible Firmware Interface) . Let’s break them down: 1. BIOS (Basic Input/Output System) ✅ Best for: Older systems (pre-2010). Simplicity and compatibility with legacy OS. ❌ Limitations: Slow boot times. Only supports MBR partitioning (max 2TB disks). No mouse support , only keyboard navigation. 🛠️ How to Check if Your System Uses BIOS? If your boot screen has a text-based interface , it’s BIOS. Run this command in Linux: test -d /sys/firmware/efi && echo "UEFI" || echo "BIOS" If it prints BIOS , you are using BIOS. 2. UEFI (Unified Extensible Firmware Interface) ✅ Best for: Modern systems (post-2010). Faster boot times (supports Fast Boot ). Supports GPT partitioning (can use disks larger than 2TB). Secure Boot feature (prot...

  Modern Disk: GPT vs. MBR Partitioning Schemes When setting up a new disk, you have two main partitioning schemes to choose from: MBR (Master Boot Record) and GPT (GUID Partition Table) . Let’s break them down: 1. MBR (Master Boot Record) ✅ Best for: Older systems (Legacy BIOS-based booting). Disks smaller than 2 TB . Simple partitioning needs (up to 4 primary partitions). ❌ Limitations: Maximum disk size: 2 TB . Can have only 4 primary partitions (or 3 primary + 1 extended partition with logical partitions inside). Less resilient to corruption (bootloader issues can make the system unbootable). 🛠️ How to Check if a Disk Uses MBR? sudo fdisk -l /dev/sdX If you see Disklabel type: dos , it means MBR. 2. GPT (GUID Partition Table) ✅ Best for: Modern systems (UEFI-based booting). Disks larger than 2 TB . Creating more than 4 partitions (supports up to 128 partitions). Better error recovery (stores multiple copies of partition data). ❌ Limitations: Not supported on...