having trouble with RAID and FC5

[Dan McCullough]

Thanks got it to work!

On 11/4/06, Gilboa Davara <gilboad at gmail.com> wrote:
> On Thu, 2006-11-02 at 19:49 -0500, Dan McCullough wrote:
> > Okay I am trying to setup RAID on FC5, almost all the examples that I
> > have found are for raidtools2, however FC5 does not have raidtools2.
> > so i have been trying to use mdadm to do it, but I keep getting
> > errors.
> >
> > So anyway I need some help in setting up RAID to work on my system.
> > Here is some preliminary information.
> >
> > ##################################################
> >
> > fdisk -l
> >
> > Disk /dev/sda: 160.0 GB, 160041885696 bytes
> > 255 heads, 63 sectors/track, 19457 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        6540    52428127+  83  Linux
> > /dev/sda3            6541       13067    52428127+  83  Linux
> > /dev/sda4           13068       19457    51327675    5  Extended
> > /dev/sda5           13068       13328     2096451   82  Linux swap / Solaris
> > /dev/sda6           13329       19457    49231161   83  Linux
> >
> > Disk /dev/sdb: 160.0 GB, 160041885696 bytes
> > 255 heads, 63 sectors/track, 19457 cylinders
> > Units = cylinders of 16065 * 512 = 8225280 bytes
> >
> >    Device Boot      Start         End      Blocks   Id  System
> > /dev/sdb1   *           1          13      104391   83  Linux
> > /dev/sdb2              14        6540    52428127+  83  Linux
> > /dev/sdb3            6541       13067    52428127+  83  Linux
> > /dev/sdb4           13068       19457    51327675    5  Extended
> > /dev/sdb5           13068       13328     2096451   82  Linux swap / Solaris
> > /dev/sdb6           13329       19457    49231161   83  Linux
> >
> > ##################################################
> >
> > df -h
> > Filesystem            Size  Used Avail Use% Mounted on
> > /dev/dm-6              46G  1.6G   42G   4% /
> > /dev/dm-1              99M  9.2M   85M  10% /boot
> > tmpfs                 473M     0  473M   0% /dev/shm
> > /dev/dm-3              49G  181M   46G   1% /home
> > /dev/dm-2              49G  233M   46G   1% /var
> >
> > any other questions please ask away.
> >
> > I had been told to use fdisk to change the ID of the drive and to make
> > it a "Linux raid auto detect" and then do that on the other disk.
> > That seemed to be okay, but then that was some instructions for
> > raidtools2.  mdadm I couldn't even get past the first one as it
> > couldn't find sda5 or sdb5, it told me to use the swap partition is
> > there is an increased chance of data loss with RAID 0, to use a
> > partition that does hold any important data.  so as you can see I am
> > right now floating along and I need some help.  If you have a better
> > way I am all ears.
> >
>
> I assume that you want to create raid0/1 on sda6/sdb6, right?
>
> Once you change sd[ab]6 to partition ID to fd (Raid auto detect), just
> run (of the top of my hand... I'm not sure... Check the mdadm man page):
> $ mdadm --build --level=0 --raid-devices=2 /dev/hda6 /dev/hdb6
> (Change to --level=1 if you want RAID1)
> You -may- need to run: (Again, check the man pages)
> $ mdadm --assemble /dev/md0 /dev/sda6 /dev/sdb6
>
> -Gilboa
>
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