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baeaan
n00b
Joined: 05 Jun 2004
Posts: 37
Location: Illinois, USA
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 Posted: Sun Nov 27, 2005 1:43 am Post subject: cannot determine md version |
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i am trying to build gentoo on a software RAID using the Gentoo 2005.1-rc1 live CD. after writing my raidtab, and creating a md0 block node in the dev directory, and partitioning my disks properly for the raid, when I run mkraid I get the following error:
| Code: |
#mknod /dev/md0 b 0 0
#mkraid /dev/md0
cannot determine md version:6
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Here is my raidtab:
| Code: |
#
# RAID Setup
#
#System RAID
raiddev /dev/md0
raid-level 0
nr-raid-disks 2
persistent-superblock 1
chunk-size 32
device /dev/hdc2
raid-disk 0
device /dev/hdd1
raid-disk 1
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anyone know what I have done wrong? |
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tgh
Apprentice
Joined: 05 Oct 2005
Posts: 222
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| Posted: Sun Nov 27, 2005 2:48 am Post subject: |
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While I use mdadm (and /etc/mdadm.conf), your mknod looks iffy to me (it might be proper). I'm pretty sure you need a '9' after the 'b'.
Prerequisites:
- in fdisk, set partition types as "fd" (linux raid autodetect)
Here's how I initialize my nodes:
| Code: | # modprobe md
# ls /dev/md*
ls: /dev/md*: No such file or directory
# for i in 0 1 2 3; do mknod /dev/md$i b 9 $i; done
# ls /dev/md*
/dev/md0 /dev/md1 /dev/md2 /dev/md3 |
Then I build the RAID arrays, be sure to change things as needed:
| Code: | # modprobe raid1
# mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/hda1 /dev/hde1
# mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/hda2 /dev/hde2
# mdadm --create /dev/md2 --level=1 --raid-devices=2 /dev/hda3 /dev/hde3
# mdadm --create /dev/md3 --level=1 --raid-devices=2 /dev/hda4 /dev/hde4
# cat /proc/mdstat
# mdadm --detail --scan >> /etc/mdadm.conf |
I use: md0 - /boot, md1 - swap, md2 - / (root), md3 - lvm2 volumes. Notice that I use the output of mdadm to create my mdadm.conf file (no messy raidtab file to edit). I haven't mucked with raidtab since a 2004.3 install.
And of course, I build everything into the kernel for md and lvm2:
(D)evice drivers
--> M(u)lti-device support (turn it ON)
--> --> (R)AID support (turn it ON as BUILT-IN)
--> --> --> (R)AID-1 mirroring mode (turn it ON as BUILT-IN)
--> --> (D)evice mapper support (turn it ON as BUILT-IN)
(There's more to my install process then that, but those are the high points.) |
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baeaan
n00b
Joined: 05 Jun 2004
Posts: 37
Location: Illinois, USA
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| Posted: Sun Nov 27, 2005 4:06 am Post subject: it worked |
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| thank you so much! it worked |
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