Extend raid 5

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Hello

I have the following problem.
I have set up a Linux Software Raid 5 with 4 160GB Disks.
This works well. Now i run out of Disk Space and want to add another
160 GB Disk on the fly. Is this possible without loosing Data?
my /etc/raidtab

raiddev /dev/md0
        raid-level      5
        nr-raid-disks   4
        nr-spare-disks  0
        persistent-superblock 1
        parity-algorithm        left-symmetric
        chunk-size      32
        device          /dev/hdi1
        raid-disk       0
        device          /dev/hdj1
        raid-disk       1
        device          /dev/hdk1
        raid-disk       2
        device          /dev/hdl1
        raid-disk       3

My system is a Debian/gnu Linux Woody Box.
Installed is Raidtools2 and mdadm.
I tried the raidreconf tool but always got an error message.
Has anybody the same problem yet and has solved it, or can tell me
a solution?

cYa
Dominik Sennfelder



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