home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.os.linux
- Path: sparky!uunet!munnari.oz.au!mel.dit.csiro.au!manta.mel.dit.CSIRO.AU!smart
- From: smart@manta.mel.dit.CSIRO.AU (Robert Smart)
- Subject: SCSI disk partioning
- Message-ID: <1992Nov10.003643.772@mel.dit.csiro.au>
- Sender: news@mel.dit.csiro.au
- Organization: CSIRO, Division of Information Technology, Melbourne
- Date: Tue, 10 Nov 92 00:36:43 GMT
- Lines: 29
-
- The SCSI FAQ says
-
- The problem with partitioning SCSI disks and Linux is that Linux
- talks directly to the SCSI interface. Each disk is viewed
- as the SCSI host sees it : N blocks, numbered from 0 to N-1,
- all error free. There is no portable way to get disk
- geometry.
-
- However, DOS doesn't like things like this, it demmands that
- BIOS present it with a normal Cylinder / Head / Sector
- coordinates. So, BIOS does, and it comes up with some fabrication
- that fits what DOS wants to see. You don't want to disagree with
- what BIOS thinks when you write the partition table.
-
- Moral : if you partition under Linux, and use a disk with
- DOS too, you MUST know the geometry according to the BIOS.
-
- The only DOS partioning program I have is FDISK, and it only seems to
- know how to create one primary plus one extended DOS partition.
-
- Can anyone suggest a better DOS partioning program: preferably free.
-
- Alternatively can anyone tell me how to work out what BIOS's fake
- cylinder/head/sector numbers are, and how to use pfdisk safely.
-
- I'll forward any information I get to the maintainer of the SCSI FAQ
- so that he can provide a more comprehensive answer.
-
- Bob Smart
-