Hi,

can use

Grow  Grow (or shrink) an array, or otherwise reshape it in some way.
Currently supported growth options including changing the
        active size of component devices in RAID level 1/4/5/6
and changing the number of active devices in RAID1.

Try to add two hdd with grow , once if you feel everything ok just
remove the old partition with mdadm.


Or manual method.
create /dev/mdN

with your new two hdd and boot with rescue mode and try something like
tar , dump etc to copy all the data to new raid device.
Change your mounting device in fstab and grub.
Reboot and check.

Thanx



On Jan 30, 2008 8:07 AM, <culkinj3@(protected):
> Hello
>
> I have a server running RHEL 4 and it has a software Raid (1) of 2 250
> gb Sata disks. I want to upgrade this to two 750 gb disks in a Raid 1
> configuration. There is not another SATA slot available.
>
> Here is some more information
>
> # df -ah
> /dev/md1         229G 196G  21G 91% /
> none              0   0   0  - /proc
> none              0   0   0  - /sys
> none              0   0   0  - /dev/pts
> usbfs             0   0   0  - /proc/bus/usb
> /dev/md0          99M  11M  83M 12% /boot
> none            505M   0 505M  0% /dev/shm
> none              0   0   0  - /proc/sys/fs/binfmt_misc
> automount(pid2042)     0   0   0  - /var/autofs/bacula
> /dev/sdc1         451G 340G  88G 80% /mnt/usb
> #
> cat /proc/mdstat
> Personalities : [raid1]
> md1 : active raid1 sda3[0]
>     242983040 blocks [2/1] [U_]
>
> md0 : active raid1 sda1[0]
>     104320 blocks [2/1] [U_]
>
> unused devices: <none>
>
>
> # cat /etc/fstab
> /dev/md1           /               ext3   defaults     1 1
> /dev/md0           /boot             ext3   defaults     1 2
> none             /dev/pts           devpts gid=5,mode=620 0 0
> none             /dev/shm           tmpfs  defaults     0 0
> none             /proc             proc   defaults     0 0
> none             /sys             sysfs  defaults     0 0
> LABEL=SWAP-sdb2      swap             swap   defaults     0 0
> LABEL=SWAP-sda2      swap             swap   defaults     0 0
> /dev/sdc1          /mnt/usb           ext3   defaults     0 0
>
>
> Any suggestions/tips?
>
> -- John C.
>
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ElectroMech
Redhat Channel Partner and Training Partner
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