AI 27b2042523 Implement mkfs.fat32 filesystem formatter app (AI) ...

Create a user-space utility that formats block devices with FAT32.
Writes all required on-disk structures sequentially:

- Boot sector (BPB) with BIOS Parameter Block at sector 0
- FSInfo sector at sector 1 with free cluster count/hint
- Backup boot sector at sector 6, backup FSInfo at sector 7
- Two FAT tables with entries 0-2 initialized (media marker,
  EOC markers, root directory cluster EOC)
- Root directory cluster with volume label entry

Geometry calculation:
- Sectors per cluster chosen based on volume size (1-32)
- FAT size computed using Microsoft's formula
- Supports volumes from 128 sectors (~64K) upward

Usage: mkfs.fat32 hdd1mbr1 14336 [LABEL]
The total sector count is required since there is no stat() syscall
yet. Users can find it via 'diskpart <dev> list'.

Also checked off diskpart in README (committed previously).

2026-02-23 16:33:12 +00:00

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