*BSD News Article 67454


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From: jm040795@fhda.edu (Raven)
Newsgroups: comp.os.linux.misc,comp.os.linux.hardware,comp.os.ms-windows.nt.setup.hardware,comp.os.ms-windows.setup.win95,comp.os.msdos.misc,comp.os.os2.setup.storage,comp.periphs.scsi,comp.sys.next.misc,comp.unix.bsd.386bsd.misc,comp.unix.solaris,comp.unix.unixware.misc,comp.unix.sys5.r4,comp.os.ms-windows.misc
Subject: Partitioning Woes INFO
Date: 2 May 1996 01:33:33 GMT
Organization: TheSharewareCollector
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Distribution: inet
Message-ID: <jm040795-0105961831030001@mencju.apple.com>
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Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:101019 comp.os.linux.hardware:37700 comp.os.ms-windows.nt.setup.hardware:8724 comp.os.ms-windows.setup.win95:9178 comp.os.msdos.misc:54573 comp.os.os2.setup.storage:4829 comp.periphs.scsi:51413 comp.sys.next.misc:39463 comp.unix.bsd.386bsd.misc:897 comp.unix.solaris:67604 comp.unix.unixware.misc:12598 comp.unix.sys5.r4:10917 comp.os.ms-windows.misc:87054

Okay, when trying to install 13 OSes, I am running into some problems.  Go
figure?  Anyways I'm trying to compile a list of problems and diagnose the
problems.  Maybe others may have some ideas or insight to what's
happening.


Problems                   Cause                    Notes
Can't boot off of second   unknown
  drive

Cannot boot above 1gig     OS uses or is setup      UnixWare and NeXTStep
                           to use BIOS to boot       have this problem.  Linux
                           versus a linear method    has this problems
with                                                                                                                                                                       

                                                     LILO, but can be
workaround                                                      
                                                     with 'linear' option.

Cannot partition drive     unknown                  Maybe a problem with INT13
 with OS fdisk utility                               vs linear partitioning. I
                                                     experienced problems with
                                                     Solaris reporting slice 
                                                     exceeds the end of disk 
                                                     when a drive is formatted
                                                     by PQMagic.  Linux also
                                                     states that the partitions
                                                     are not aligned on correct
                                                     boundries.

Cannot install OS into     OS does not support      WindowsNT, OS/2, and Linux
 extended logical           this feature             support this feature
 partitions

Can only use/create four   Inherent limitation      Microsoft has a standard
 partitions                 PC clones.               partitioning scheme which
                                                     supports more than four
                                                     partitions.  Currently only
                                                     DOS, Window95, WindowsNT
                                                     OSes support this
standard.            

Cannot boot NT or OS2      Some OSes/software       WindowsNT and OS/2 exhibit
and/or run Windows          are configured to        this behavioral problem
software after creating     boot/load from a         when booting.  Windows apps
DOS/Win95 partitions.       static particular        and even some DOS apps
                            partition.               exhibit this problem.


Termanologies/Technologies:

o Volumes - This is where you save you data.  It could be a file, drive, 
   partition, network volume, floppy, serveral network volumes around the 
   network merged together to appear as a drive.
o Soft Partition - A file which exists within a hard partition.  This file is a
   contains the actual data contained within the virtual partition.  On 
   Macintoshes a driver will mount this file as a partition that can be used.  
   On PCs, it could possible load soft partition files as volumes using a driver
   for a propiertary format.  Operating Systems have the ability to mount 
   logical drives existing within the extended partition.  This logical drives 
   are actually files, or soft partitions, existing withing the extended 
   partition.
o Hard Partition - This is a predined area within you hard drive sectioned off 
   for storing data.  A hard partition must be mapped on even cylinder    
   boundries.
o Extended partition - This partition is only used for contianing soft 
   partitions called logical drives.  You cannot use the extended partition 
   itself a drive, but rather smaller partitions within the extended partition.
o Primary partition - This is a partition commonly used on PCs.  You cannot have
   smaller partitions within this volume.
o Geometry - This is how sectors are laid out on a hard drive.  On IDE drives 
   this is all consistant, but for SCSI drives, the geometry layout varies from 
   SCSI card to SCSI card by different vendors.  Many SCSI cards will read
other 
   vendors SCSI geometry, especially Adaptec products.  This causes
problems for 
   users whom try to take devices for one computer to another with SCSI cards 
   made by different vendors.  I believe this can be allievated by smart OSes 
   which can read multiple geometries.

I could be way off here on understanding extended partitions, but from
using PCs for a few years, I believe this is how they works.  I do know
however that you are limited to only four partitions which really sucks.

If anyone has had problems partitioning and installing OSes, let me know. 
I thought of compiling a chart of known problems and possible workarounds.

Send me any suggestions, better descriptions for novice users, or
additional input or even questions/problems.

- joaquin