Re: Increasing Space in Software Raid

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@xxxxxxxxxxxx> wrote:
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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