On Tuesday, December 21, 2010 11:49:05 pm xinyou yan wrote:
> 2010/12/22 Dennis Gilmore <dennis@xxxxxxxx>:
> > On Tuesday, December 21, 2010 11:30:16 pm xinyou yan wrote:
> >> First I add sdb sdc sde fdisk to sdb1 sdc1 sdd1 sde1
> >> then
> >> # mdadm --create --level=5 --raid-devices=4 /dev/sd{b,c,d,e}1
> >> #mkdir /mnt/raid
> >> #mkfs.ext4 /dev/md0
> >> #vi /etc/fstab
> >>
> >> add /dev/md0 /mnt/raid ext4 defaults 1 2
> >>
> >> after reboot
> >>
> >> fsck.ext4: Invalid argument while trying to open 0
> >> /dev/md0:
> >> The superblock could not be read or does not describe a correct ext2
> >> filesystem. If the device is valid and it really contains an ext2
> >> filesystem (and not swap or ufs or something else), then the superblock
> >> is corrupt, and you might try running e2fsck with an alternate
> >> superblock: e2fsck -b 8193
> >> * Fsck could not correct all errors, manual repair needed
>
> .....
>
> > you need to setup /etc/mdadm.conf
> > you want a line like bellow
>
> Now i can't write the file
> What i can see (Repair filesystem) #
>
> the /etc/mdadm.conf is read only
>
> > ARRAY /dev/md0 level=raid5 num-devices=4 uuid=<uuid of your array>
> >
> > to get your uuid run "mdadm --examine /dev/sdc1 |grep UUID"
> >
you need to remount / as rw
mount -o remount,rw /
then it will be writable
Dennis
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