Very Computer

by **Daniel Chue** » Fri, 22 Dec 2000 05:46:57

Hi,

Has anyone tried to created a Software RAID 0 drive under Redhat Linux 7.0?
I followed the instructions to create the /etc/raidtab file with the
following settings on a Abit KT7-RAID motherboard with 2 Maxtor 20GB 7200RPM
ATA100 hard drives. Kernel was recompile to include the raid modules.

/etc/raidtab
--------------------------------------------------------
raiddev /dev/md0
raid-level 0 # it's not obvious but this *must* be
# right after raiddev
persistent-superblock 1 # set this to 1 if you want autostart,
# BUT SETTING TO 1 WILL DESTROY PREVIOUS
# CONTENTS if this is a RAID0 array created
# by older raidtools (0.40-0.51) or mdtools!
chunk-size 16
nr-raid-disks 2
nr-spare-disks 0
device /dev/hde1
raid-disk 0
device /dev/hdg1
raid-disk 1
-----------------------------------------------------------------

when I try to run mkraid, it give the following error:

----------------------------------------------------

handling MD device /dev/md0
analyzing super-block
disk 0: /dev/hde1, 20010784kB, raid superblock at 20010688kB
disk 1: /dev/hdg1, 20010784kB, raid superblock at 20010688kB
mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
----------------------------------------------------------------------------
----------------------

cat /proc/mdstat result in the following:
---------------------------------------------------------
Personalities : [2 raid0]
read_ahead not set
md0 : inactive
md1 : inactive
md2 : inactive
md3 : inactive
---------------------------------------------------------

both hard drives /dev/hde and /dev/hdg are partitioned as type fd
-----------------------------------------------------------
Disk /dev/hde: 16 heads, 63 sectors, 39704 cylinders
Units = cylinders of 1008 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hde1 1 39704 20010784+ fd Linux raid autodetect

Disk /dev/hdg: 16 heads, 63 sectors, 39704 cylinders
Units = cylinders of 1008 * 512 bytes

Device Boot Start End Blocks Id System
/dev/hde1 1 39704 20010784+ fd Linux raid autodetect
----------------------------------------------------------------------------
------------------

The kernel has been patch for the highpoint controller and is functioning
properly. The kernel has no problem detecting and formating the drivers
individually.

Am I missing something here? Any help is greatly appreciated!

Daniel Chuen

by **Luckydaz** » Fri, 22 Dec 2000 07:57:26

I used Mandrake 7.2 and it was so simple to set up software raid mode
0. I'm running it right now. I also tried RH 7.0 and had no problems
either. Number one you must make a boot partition first outside the
raid device. Second, you must create a / or root directory on the MD0
or raid device then just format it. BTW I used the Reiser file system
instead of the ext2 format. Much faster in raid. Mandrake gave me that
option.

On Wed, 20 Dec 2000 13:46:57 -0700, "Daniel Chuen"

>Hi,

>Has anyone tried to created a Software RAID 0 drive under Redhat Linux 7.0?
>I followed the instructions to create the /etc/raidtab file with the
>following settings on a Abit KT7-RAID motherboard with 2 Maxtor 20GB 7200RPM
>ATA100 hard drives. Kernel was recompile to include the raid modules.

>/etc/raidtab
>--------------------------------------------------------
>raiddev /dev/md0
>raid-level 0 # it's not obvious but this *must* be
> # right after raiddev
>persistent-superblock 1 # set this to 1 if you want autostart,
> # BUT SETTING TO 1 WILL DESTROY PREVIOUS
> # CONTENTS if this is a RAID0 array created
> # by older raidtools (0.40-0.51) or mdtools!
>chunk-size 16
>nr-raid-disks 2
>nr-spare-disks 0
>device /dev/hde1
>raid-disk 0
>device /dev/hdg1
>raid-disk 1
>-----------------------------------------------------------------

>when I try to run mkraid, it give the following error:

>----------------------------------------------------

>handling MD device /dev/md0
>analyzing super-block
>disk 0: /dev/hde1, 20010784kB, raid superblock at 20010688kB
>disk 1: /dev/hdg1, 20010784kB, raid superblock at 20010688kB
>mkraid: aborted, see the syslog and /proc/mdstat for potential clues.
>----------------------------------------------------------------------------
>----------------------

>cat /proc/mdstat result in the following:
>---------------------------------------------------------
>Personalities : [2 raid0]
>read_ahead not set
>md0 : inactive
>md1 : inactive
>md2 : inactive
>md3 : inactive
>---------------------------------------------------------

>both hard drives /dev/hde and /dev/hdg are partitioned as type fd
>-----------------------------------------------------------
>Disk /dev/hde: 16 heads, 63 sectors, 39704 cylinders
>Units = cylinders of 1008 * 512 bytes

> Device Boot Start End Blocks Id System
>/dev/hde1 1 39704 20010784+ fd Linux raid autodetect

>Disk /dev/hdg: 16 heads, 63 sectors, 39704 cylinders
>Units = cylinders of 1008 * 512 bytes

> Device Boot Start End Blocks Id System
>/dev/hde1 1 39704 20010784+ fd Linux raid autodetect
>----------------------------------------------------------------------------
>------------------

>The kernel has been patch for the highpoint controller and is functioning
>properly. The kernel has no problem detecting and formating the drivers
>individually.

>Am I missing something here? Any help is greatly appreciated!

>Daniel Chuen

by **Luckydaz** » Fri, 22 Dec 2000 08:02:31

Oh I'm not running it off the drives on the Highpoint controller. I'm
running raid for Win 98 and 2k on that. I have Mandrake on my old
drives on ide 1 and 2 ata 33. You can't run raid off the highpoint
controller AFAIK. I don't think software raid will work either. Let me
know if you get it working. Or, try the drivers for Linux at
www.highpoint-tech.com but they're only for single drives on the HPT
controller. Try it anyway, might work.