Linux Extend on MSA 1500 cs

[Mecit]

we have an MSA 30 that attached to MSA1500cs and hosted by DL 580 G3 on which is installed Linux RHEL 4 U2.There is a Raid 5 on MSA30 enclosure and we have added new disk to MSA30 and expanded and extended through ACU.But when we check result with fdisk -l command, there is no change on Raid 5 size that is same as old size.We ran hp_rescan command but everything is same.Our partition is LVM volume..What do we have to do?

[m saravanan]

I'm not sure, whether the linux will support the extend of LUNs on the fly. Beacuse, currently HP-UX also not supporting the extension of Physical Extents on the fly.

But, Windows servers do support. (dynamic disks).


Regds,
Saravanan

[Ken Grabowski]

Linux does not do disk extension. Increasing the size of a disk will not dynamically increase the Linux disk. You need to present new disk space as a new disk to the Linux system and then add that disk to the LVM group. You can then use the new space to increase existing file systems or create new ones in the LVM group.

[Mecit]

ok..Will the disk that added to LVM be contained by Raid 5???.if not, when the new disk is disk failure, all data on the disk will be lost??? or replace the disk and will the rebuiding start automatically..????

[Stephen Kebbell]

Hi,

since you've already extended the logical drive, I think you're stuck. You can't undo an extension. If you had just expanded the array, and created a new logical drive, then you would have been OK. And you can set the RAID-level for each logical disk - both RAID-5, or one RAID-5, the other RAID 1 (if you have an even number of disks in the array).

Regards,
Stephen