Re: Partitioning

At 08:58 PM 8/9/02 -0400, Natarajan K wrote:
>HI,
> I tried changing an existing dos partition into a ext2 one using
> mkfs.ext2
>and mk2efs.
> # mkfs.ext2 /dev/hda7

You do this and it does not return an error?

>But the partition type is still FAT 32 when I use fdisk(in Linux). I am not
>able to mount it as a FAT partition though.

Right. That's because you have a mess, not a working partition/filesystem
combination. You need to change the partition type in fdisk, using the "t"
command.

Only after you have changed the partition type to "Linux" (0x83) should you
try to create a filesystem using mke2fs or mkfs.ext2 .

>If I delete the partition then my
>partition numbers get changed i.e.
>If I am delete /dev/hda7 -- FAT 32 (mentioned above)
>then the following happens
>/dev/hda8 -----> /dev/hda9 (Linux swap)
>/dev/hda9 -----> /dev/hda8 (ext2)
>
>The /dev/hda9 partition houses LInux.

I don't understand this part. If the swap partition became hda7, I would
have a *guess* about what is going on (basically, that logical partitions
need to be numbered in order, so deleting one causes the others to move up
.... I haven't actually seen this behavior, but I doubt I've ever actually
tried anything that would cause it). But I can't think of a reason why the
deletion would cause two other partitions to *exchange* their listings in
the partition table.

>If the partition number changes then I
>may need to run LILO again. But is there no other way out to convert the
>existing FAT partition to an ext2 partition.

There is, and I described it above. Recaping, you need to do it in two steps:

1. Use fdisk to change the partition type to Linux (0x83).
2. Use mke2fs to create an ext2 filesystem in the partition.




--
-------------------------------------------"Never tell me the odds!"--------
Ray Olszewski -- Han Solo
Palo Alto, California, USA ray@comarre.com
------------------------------------------------------------ -------------------

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Re: Partitioning

Hi.

> I tried changing an existing dos partition into a ext2 one using
> mkfs.ext2 and mk2efs.

>> # mkfs.ext2 /dev/hda7

> But the partition type is still FAT32 when I use fdisk (in Linux).
> I am not able to mount it as a FAT partition though.

Actually, the "Windows partition type" is still FAT32 as that's what is
stored in the partition table. You correct this by using the 't' command
within Linux fdisk and setting the relevant partition's value to 83.

> If I delete the partition then my partition numbers get changed i.e.
> If I am delete /dev/hda7 -- FAT 32 (mentioned above) then the
> following happens

> /dev/hda8 -----> /dev/hda9 (Linux swap)
> /dev/hda9 -----> /dev/hda8 (ext2)

> The /dev/hda9 partition houses LInux.

This happens because you are dealing with what Windows calls "Logical
partitions", and those can only be safely deleted from the end.

> If the partition number changes then I may need to run LILO again.

As it happens, you won't need to rerun lilo but you WILL need to tweak
various Linux configuration files to adjust which partitions are mounted
or exported where, so I would suggest you don't do this.

> But is there no other way out to convert the existing FAT partition
> to an ext2 partition.

See above.

Best wishes from Riley.

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Partitioning

HI,
I tried changing an existing dos partition into a ext2 one using mkfs.ext2
and mk2efs.
# mkfs.ext2 /dev/hda7
But the partition type is still FAT 32 when I use fdisk(in Linux). I am not
able to mount it as a FAT partition though. If I delete the partition then my
partition numbers get changed i.e.
If I am delete /dev/hda7 -- FAT 32 (mentioned above)
then the following happens
/dev/hda8 -----> /dev/hda9 (Linux swap)
/dev/hda9 -----> /dev/hda8 (ext2)

The /dev/hda9 partition houses LInux. If the partition number changes then I
may need to run LILO again. But is there no other way out to convert the
existing FAT partition to an ext2 partition.
--
Natarajan
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Re: [Ilugc] Partitioning

On Fri, 9 Aug 2002, Natarajan K wrote:

> I tried changing an existing dos partition into a ext2 one using
> mkfs.ext2 and mk2efs.
> # mkfs.ext2 /dev/hda7
> But the partition type is still FAT 32 when I use fdisk(in Linux). I am not
> able to mount it as a FAT partition though. If I delete the partition then my
[tale of woe deleted]

perhaps, an analogy might help understand what is going on. think of your
hard disk as a book; the partition table is like the table of contents of
the book (only contains information about what is where and such stuff)
and the file system describes the format in which the the information in
each chapter itself is organized. of course, your data itself is like the
actual text matter of the book. using fdisk (or disk druid or some other
such tool) will manipulate the partition table and not touch the file
system that actually resides on the disk. using mkfs or dos/win 'format'
command creates the file system (the way in which the actual data itself
is organized) and will not touch the table of contents er. i mean,
partition table.

as for whether change of partition numbers needs lilo to be run, it
depends. recent linux versions use partition labels to mount partitions -
look in what what /etc/fstab has; if the first column is label=blah, then
you have this later style. if the first column is /dev/blah, then you have
the older style. in the old style, yes, you have to edit fstab
accordingly, but may not need to run lilo unless your / or /boot partition
has changed number. if you have the newer label=blah style, only if /boot
changes (or /, if /boot is not a separate partition but resides within /)
do you have to run lilo after making the change in lilo.conf. if your
partitions dont have lebels, you can use e2label command to create (or
even read) the labels. grub makes it easier to handle such situations.
with lilo, if there is a mistake in lilo.conf, you are in trouble. with
grub, you can edit the grub.conf at boot time and get into the system.

sriram


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RE: Partitioning

Many new Serial ATA controllers have their modules listed as SCSI
devices, I am not sure why, I think it has to do with their standards or
something. This is normal. Also, what the auto partitioning did was
create a 100 Mbyte partition for use as /boot, and the rest of the drive
allocated as LVM (Logical Volume Manager). What you do is create virtual
file systems inside the LVM (such as /, /usr, /var, /home, whatever).
This quickly becoming the norm in the Linux community.

Michael Turcotte
Information Systems
City of North Bay
200 McIntyre St. E
PO Box 360
North Bay, Ontario
P1B 8H8

Mike.Turcotte@cityofnorthbay.ca
http://www.cityofnorthbay.ca

> -----Original Message-----
> From: linux-newbie-owner@vger.kernel.org [mailto:linux-newbie-
> owner@vger.kernel.org] On Behalf Of smertz
> Sent: Thursday, April 07, 2005 10:18 AM
> To: linux-newbie@vger.kernel.org
> Subject: Partitioning
>
> I noticed after installing Red Hat Enterprise Linux ES release 4
> (Nahant) last week when I do a fdisk -l that the automatic
partitioning
> might not have done such a good job of partitioning out my 200 GIG HD.
>
> [root@localhost ~]# fdisk -l
>
> Disk /dev/sda: 200.0 GB, 200049647616 bytes
> 255 heads, 63 sectors/track, 24321 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/sda1 * 1 13 104391 83 Linux
> /dev/sda2 14 24321 195254010 8e Linux LVM
> [root@localhost ~]#
>
>
> Shouldn't there normally be a few more partitions like /swap /usr etc?
> If so is it possible to manipulate these post install? Or better to
go
> back and re-install and manually do the partitions? Either way I would
> appreciate any advice on allocating the HD out. There will be no
other
> OS on this drive/machine, just RH.
>
> Also I'm curious why my Hard drives are listed as sda1. These are ATA
> drives. Just looked at the drive they are the new SATA drives and may
> be recognized incorrectly.
>
> Thanks
>
> -
> To unsubscribe from this list: send the line "unsubscribe
linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
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Re: Partitioning

Mike Turcotte wrote:
> Many new Serial ATA controllers have their modules listed as SCSI
> devices, I am not sure why, I think it has to do with their standards or
> something. This is normal. Also, what the auto partitioning did was
> create a 100 Mbyte partition for use as /boot, and the rest of the drive
> allocated as LVM (Logical Volume Manager). What you do is create virtual
> file systems inside the LVM (such as /, /usr, /var, /home, whatever).
> This quickly becoming the norm in the Linux community.


Is there a command to see how the LV partitioning was done by the
installer? If so what is it? I would think the installer did put a
/var/home/etc there.

THX


>
> Mike.Turcotte@cityofnorthbay.ca
> http://www.cityofnorthbay.ca
>
>
>>-----Original Message-----
>>From: linux-newbie-owner@vger.kernel.org [mailto:linux-newbie-
>>owner@vger.kernel.org] On Behalf Of smertz
>>Sent: Thursday, April 07, 2005 10:18 AM
>>To: linux-newbie@vger.kernel.org
>>Subject: Partitioning
>>
>>I noticed after installing Red Hat Enterprise Linux ES release 4
>>(Nahant) last week when I do a fdisk -l that the automatic
>
> partitioning
>
>>might not have done such a good job of partitioning out my 200 GIG HD.
>>
>>[root@localhost ~]# fdisk -l
>>
>>Disk /dev/sda: 200.0 GB, 200049647616 bytes
>>255 heads, 63 sectors/track, 24321 cylinders
>>Units = cylinders of 16065 * 512 = 8225280 bytes
>>
>> Device Boot Start End Blocks Id System
>>/dev/sda1 * 1 13 104391 83 Linux
>>/dev/sda2 14 24321 195254010 8e Linux LVM
>>[root@localhost ~]#
>>
>>
>>Shouldn't there normally be a few more partitions like /swap /usr etc?
>>If so is it possible to manipulate these post install? Or better to
>
> go
>
>>back and re-install and manually do the partitions? Either way I would
>>appreciate any advice on allocating the HD out. There will be no
>
> other
>
>>OS on this drive/machine, just RH.
>>
>>Also I'm curious why my Hard drives are listed as sda1. These are ATA
>>drives. Just looked at the drive they are the new SATA drives and may
>>be recognized incorrectly.
>>
>>Thanks
>>
>>-
>>To unsubscribe from this list: send the line "unsubscribe
>
> linux-newbie" in
>
>>the body of a message to majordomo@vger.kernel.org
>>More majordomo info at http://vger.kernel.org/majordomo-info.html
>>Please read the FAQ at http://www.linux-learn.org/faqs
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
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>

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Re: Partitioning

On Thu, 7 Apr 2005, smertz wrote:

> Is there a command to see how the LV partitioning was done by the installer?
> If so what is it?

I think the mount command might get what you want. If not, maybe dh. I've
used a system set up with LVM a little, but not enough to remember
precisely.

James
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