how to take care of this the right way.
Roelof Wobben
Soon im going try to install Openbsd for the first time.
My computer looks like this :
Processor :AMD64
Memory : 1 Gb.
Two hard disk : 1 of 80Gb and 1 of 40Gb.
On th 80 Gb hard disk is Windows and a ghost file of Windows.
On the 40Gb is My documents and some 25Gb for Openbsd.
What;'s the best way to make the 40 Gb disk ready for Openbsd. My documents
are on the first sectors of the 40GB disk. Must i place this on another
place with Partitionmagic ?
Regards,
Roelof
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Josh Grosse
> ...Two hard disk : 1 of 80Gb and 1 of 40Gb.
> On th 80 Gb hard disk is Windows and a ghost file of Windows.
> On the 40Gb is My documents and some 25Gb for Openbsd.
>
> What;'s the best way to make the 40 Gb disk ready for Openbsd. My documents
> are on the first sectors of the 40GB disk. Must i place this on another
> place with Partitionmagic ?
On 5 or 6 architectures, including amd64, OpenBSD uses two levels of
partitioning. The MBR and MBR partitions used by BIOS, and then, its own
disklabel for OpenBSD partitions.
When you boot install media, and run the install script, once you begin
the install you will first be asked which disk you'd like to use for the
root partition, and then, if you'd like to use the entire disk for OpenBSD
or not. If you want to use the entire disk, the MBR will be rewritten
and a single MBR partition will be created. If you answer no (the
default), you will then run an interactive fdisk(8) session, where you can
assign a primary MBR partition (type A6) for OpenBSD, and make it active
so that the BIOS will boot the PBR. After fdisk MBR partitioning
(automated if dedicating the disk, manual if not), you will then run an
interactive disklabel(8) session to partition OpenBSD within the MBR.
Before answering the first disk question, you may want to make sure which
disk (wd0 or wd1 if IDE/ATA, sd0 or sd1 if SCSI) is the 80 and which is
the 40!
If you are not comfortable dealing with manual MBR partitioning, and
Cylinder Head Sector (CHS) addressing, you should consider migrating your
Windows "My Documents" data onto your 80GB drive and dedicating the 40GB
to OpenBSD. There will be less risk that you would have to restore data
due to an unintentional error.
FAQ 4 discusses both dedicated drive and shared drive installations with
MBRs, and there is also the INSTALL.amd64 document for additional detail.
Both should be reviewed, and backups made, prior to starting your first
install.
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Roelof Wobben
I read that part.
What i ment with my question is how big can the partititons are and can the
partitions be after the partition with my documents (15Gb) or do i have to
arrange the partitions ??
Roelof
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news:pan.2007.01.09....@jggimi.homeip.net...
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Josh Grosse
> oke,
>
> I read that part.
> What i ment with my question is how big can the partititons are and can the
> partitions be after the partition with my documents (15Gb) or do i have to
> arrange the partitions ??
I'm not sure what you are asking, exactly. An MBR partition must be
contiguous space, and OpenBSD requires and uses only a single MBR
partition.
If your 15GB of used space on your 40GB drive is in a 40GB MBR
partition, the size of the partition must be reduced before you can add
another partition. If the 15GB of used space is in a 15GB partition, then
you have 25GB of free space that can be partitioned and used by OpenBSD.
I will try to level set:
1. A hard drive may have up to 4 primary MBR partitions.
2. OpenBSD must reside within a single primary MBR partition, type A6.
3. OpenBSD uses disklabels for its own partitioning, using the letters
"a" "b" "c" "d" ...
4. The "c" partition will be the entire physical drive, including the MBR
and all MBR partitions.
5. If a disklabel is not on the drive already, a virtual disklabel
is made available to OpenBSD: the "c" partition, which is the entire
drive, and recognized MBR partition types may be given letters as well.
For example, if your 40GB disk you have a primary MBR FAT32 partition, and
25GB unused space, your virtual disklabel will show 2 partitions: "c" and
"i" -- where "c" is the entire disk, and "i" is the FAT32 partition.
(OpenBSD can also read NTFS partitions, but that support is not in the
GENERIC kernels.) You can then add your own "a" "b" and other partitions
to the disklabel, and write it to disk.
If this didn't answer your question, please ask again.