Topic: raid inquiry

[kryptos]

Hi all,

I have installed 3x500gb drives using sme nospare setup before. Now i want to add 1 drive same capacity. How do i do this?

Regards,
Rocel

[Reinhold]

Rocel ,

I am afraid SME 7.3 is a bit old for your problem...
Kernel 2.6.9-67.0.7.EL
mdadm - v1.12.0 - 14 June 2005
...you need at least kernel 2.6.17 (if memory serves me right) (also mdadm current is at 2.6.1)

otherwise it's a easy as:
(assuming you add identical formatted /dev/sdd   _and_  you used 'nospare nolvm')

mdadm --add /dev/md3 /dev/sdd3
mdadm --grow /dev/md3 --raid-devices=4

Will take "couple of hours" to reshape the array.
cat /proc/mdstat
[>....................] reshape = 0.0% (xxx/yyyy) finish=1234.5min speed=6789K/sec

The filesystem then needs to be expanded to fill up the new space (have a look  here):
fsck.ext3 /dev/md3
resize2fs /dev/md3

WARNING: You could (of course) use a LIVECD (Knoppx?) for this...
...but it sure is dangerous and you'd better know what you do.

Regards
Reinhold

[kryptos]

hi,

I have tried those commands on SME and it gives me an error. I don't know what kernel will i give if update SME. I will try with knoppix.

Thanks,
Rocel