Thanks for the replys

Isn't it a little more complicated then that. I would have to make
partitions on the new device and then I would have to expand then later

Let me see if I can get a little Betty Crocker recipe here so that we
are all on the same page

#Fail on device
mdadm --fail /dev/sda1
#Remove the failed drive and then replace it with a larger disk
# mount the disk and format it (would I need a restart in there?)
# Here is where it gets a little tricky for me
# I think I need to make matching partitions on the larger device so
that I can bring it into the RAIDs (one for /boot, one for / root)
#once that is rebuild I will break the raid again so that I can remove
the remaining smaller disk
#I will then insert the new disk and mout and formate it
# before I bring the new disk into the raid I will want to grow the size
of the / root raid - this will also mean that I will have to grow its
partition - any tips on that?

Am I missing anything?

-- John C.

Broekman, Maarten wrote:
> The easiest way would be to break the mirror. Replace the non-live
> device with the new drive. Make a new metadevice with the new device.
> Copy the data. Remove the last old device and put in the second new
> device. Then re-mirror.
>
> To make life easier you might want to use LVM also rather than raw
> metadevices on the new devices.
>
> Maarten Broekman
>
> -----Original Message-----
> From: redhat-list-bounces@(protected)
> [mailto:redhat-list-bounces@(protected)
> culkinj3@(protected)
> Sent: Tuesday, January 29, 2008 9:38 PM
> To: redhat-list@(protected)
> Subject: Increasing Space in Software Raid
>
> 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.
>
>  

--
John J. Culkin      Systems Administrator
John.Culkin@(protected)
Phone: (570) 941-7665

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