[linux-lvm] LVM partition growth after Dell MegaRAID RAID array growth
David Grierson
david.grierson at lumison.net
Fri Feb 4 15:43:33 UTC 2005
Hi,
I'm in the process of installing (so fortunately can reformat, rinse,
repeat as necessary) a new Dell PowerVault attached to a PowerEdge
running RHEL3.
I'm looking to have the facility to be able to grow the RAID arrays at a
later date. The Dell PERC 4/DC card installed supports growing the RAID
array, however since I created the physical volume to utilise the whole
disk it hasn't seen the growth in the PV:
> [root at nbg01-filer-01 root]# pvdisplay /dev/sdb
> --- Physical volume ---
> PV Name /dev/sdb
> VG Name splitbus0
> PV Size 546.48 GB [1146060800 secs] / NOT usable 32.25 MB [LVM: 196 KB]
> PV# 1
> PV Status NOT available
> Allocatable yes (but full)
> Cur LV 1
> PE Size (KByte) 32768
> Total PE 17486
> Free PE 0
> Allocated PE 17486
> PV UUID duXmrI-c1d0-pPew-VNL4-ce6N-5h14-6swMqK
However lvmdiskscan recognises that the disk has grown in capacity:
> [root at nbg01-filer-01 root]# lvmdiskscan
> lvmdiskscan -- reading all disks / partitions (this may take a while...)
> ...
> lvmdiskscan -- /dev/sdb [ 683.11 GB] USED LVM whole disk
> ...
Looking at the lists I realise that extending the physical volumes isn't
supported yet.
So, to ask my question (about time too I hear you say), what advice
would you give me in order to achieve expandability of the RAID array at
a later date when we have filled existing capacity?
Should I partition /dev/sdb before I create the physical volume and then
partition any new space which is added and then add those partitions to
the volume group? Or is there some more clever way to do it?
Cheers,
Dg.
--
David Grierson
Lumison
t: 0845 1199 900
d: +44 131 514 4053
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