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- Path: sparky!uunet!wupost!uwm.edu!uwm.edu!usenet
- From: rick@ee.uwm.edu (Rick Miller, Linux Device Registrar)
- Newsgroups: comp.os.linux
- Subject: Re: [Q] Linux fdisk DOS compatible?
- Date: 27 Dec 1992 10:30:45 GMT
- Organization: Just me.
- Lines: 38
- Message-ID: <1hk0klINNaor@uwm.edu>
- References: <9212205626@monad.swb.de> <mrhoten.725408533@Xenon.Stanford.EDU>
- NNTP-Posting-Host: 129.89.2.33
- Summary: Let's get the terminology straight, folks.
-
- mrhoten@cs.stanford.edu (Matt Rhoten) writes:
- >okir@monad.swb.de (Olaf Kirch) writes:
- >
- >> Since DOS fdisk refused to make more than one primary partition, I
- >> used Linux fdisk. However, I left one partition for later use with
- >> DOS. But now, DOS won't recognize my disk at all!
- >
- >I ran into this as well. DOS breaks if you have more than one primary
- >partition. Since you don't need any of your linux partitions to be
- >primary partitions, you could simply remove the "bootable" or primary
- >bit from them with linux fdisk, leaving only your DOS partition marked
- >primary.
-
- WHOA-THERE! I think you guys mean "BOOT" partition, not "primary".
-
- A "primary" partition is not a certain partition, but a certain *kind* of
- partition. A "primary" partition is, itself, a single partition... as
- opposed to an "extended" partition which may be divided into several sub-
- partitions or "logical" partitions.
-
- You can have up to four physical partitions (Primary/Extended) on any one
- hard drive, but the number of partitions you'll see will depend upon how
- many logical divisions each (if any) Extended partition is split into.
-
- Now... As for marking a physical (Primary/Extended) partition as a "boot"
- partition (a single-bit flag), you may only do this with *one* physical
- partition at a time under DOS. It only makes sense, since your machine
- doesn't come with a built-in boot-selector. If you use Linux's fdisk to
- flag more than one partition as "boot", your machine won't know which to
- use (for DOS or for Linux, you're not even in any operating system yet),
- and it will crash.
-
- The best option I've seen is LILO... put it on a Primary partition where
- some of your Linux is (I've heard that can even sit on the swap partition)
- and tell LILO where to find your DOS stuff. It works for me...
-
- Rick Miller <rick@ee.uwm.edu> | <rick@discus.mil.wi.us> Ricxjo Muelisto
- Occupation: Husband, Father, WEPCo. WAN Mgr., Discus Sys0p, and Linux fan
-