fdisk C/H/S IDE drive question


Subject: fdisk C/H/S IDE drive question
From: Andy Firman (andy@firman.us)
Date: Sat Feb 07 2004 - 09:27:57 AKST


I have 2 WD400BB 40GB drives and getting ready
to start software RAID on a new system.

Motherboard is a simple MSI KM4M with 2 IDE controllers.

This is strange to me:

fdisk reports this when either drive is /dev/hda
Size: 40020664320 bytes
Heads: 255 Sectors per Track: 63 Cylinders: 4865

fdisk reports this when either drive is /dev/hdc
Size: 40020664320 bytes
Heads: 16 Sectors per Track: 63 Cylinders: 77545

man fdisk says Linux never uses CHS but I would like
to know why fdisk reports things differently when the
drives are on different IDE controllers.

When I go into the BIOS, it shows both drives being
exactly the same in all aspects.

Both drives are set to "auto" in the bios and they
both have the jumper on CS (cable select)

Why would fdisk report differently when the drives
are on the second IDE controller?

Must be some sort of motherboard/bios issue right?

Thanks,
Andy
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This archive was generated by hypermail 2a23 : Sat Feb 07 2004 - 09:38:45 AKST