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Next Previous Contents Large Disk HOWTO Andries Brouwer, aeb@cwi.nl v2.2s, 9 December 2024 All about disk geometry and the 1024 cylinder limit for disks. For the most recent version of this text, see www.win.tue.nl. 1. The problem 2. Summary 3. Units and Sizes 3.1 Sectorsize 3.2 Disksize 4. Disk Access 4.1 BIOS Disk Access and the 1024 cylinder limit 4.2 History of BIOS and IDE limits 5. Booting 5.1 LILO and the `linear' option 5.2 A LILO bug 5.3 1024 cylinders is not 1024 cylinders 5.4 No 1024 cylinder limit on modern machines 5.5 No 1024 cylinder limit on old machines with IDE 6. Disk geometry, partitions and `overlap' 7. Translation and Disk Managers 8. Kernel disk translation for IDE disks 8.1 EZD 8.2 DM6:DDO 8.3 DM6:AUX 8.4 DM6:MBR 8.5 PTBL 8.6 Getting rid of a disk manager 9. Consequences 9.1 Computing LILO parameters 10. Details 10.1 IDE details - the seven geometries 10.2 SCSI details 11. The Linux IDE 8 GiB limit 11.1 BIOS complications 11.2 Jumpers that select the number of heads 11.3 Jumpers that clip total capacity 12. The Linux 65535 cylinder limit 12.1 IDE problems with 34+ GB disks 13. Extended and logical partitions 14. Problem solving 14.1 Problem: My IDE disk gets a bad geometry when I boot from SCSI. 14.2 Nonproblem: Identical disks have different geometry? 14.3 Nonproblem: fdisk sees much more room than df? Next Previous Contents

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