SAN space increase and VVR configuration with no application downtime
Trying to configure VVR after adding SAN space without application downtime on Solaris 10 OS.
On 09/08/2011 Heim Wally from Symantec posted the following solution in relation to Windows OS:
As you mentioned, you can increase the size of a volume in two ways.
1. You can add another disk to the servers, add it to the disk group, then expand the volume on to the new disk (assuming that you are not running a stripe or RAID5 volume.) This can be done with no down time to the application at all - AKA it can be done on a live production system.
2. You can increase the size of the existing lun being presented and then expand the volume to the extra space on the lun. There are some concerns with this approach.
a. If the disk style is GPT then the process can be done online wihtout much concern.
b. If the disk style is MBR, then you should run vxcbr.exe to take a manual backup of the private region before expanding the lun. The reason for this is the private region for MBR disks are at the end of the disk. SFW should during the next rescan move the private region to the new end of the lun. However, if there are problems moving the private region then the disk will revert to the basic group. If the private region does not move then access to the data will be lost until the vxcbr backup is restored. Also keep in mind that MBR disks have a max size of just under 2TB (2TB - 4KB I think.)
Can option 1 be executed on Solaris 10 OS? If so, please provide detailed commands or a reference to documentation with detailed VVR commands.