Thursday, October 17, 2013

HP-UX LVM features

www.unixbabuforum.inWe are designing our SAP solution on HP-UX. We are going to use the default LVM that comes with HP-UX and would like to ask if it can be resised online like LVM of IBM AIX ? even the root File Systems like temp, var, usr and so on ??? 


www.unixbabuforum.inIf you will use LVM (smart move) on HP Unix and you want to resize online you need to have a product call "Online JFS". Please note that depending on the grade not version of HP unix it comes with the package. To check if you have ONLINE JFS execute command "swlist -l product | grep -i online". 

Please also note that even with ONLINE JFS installed you will not be able to re-size the first three logical volumes on VG00(/dev/vg00/lvol1, lvol2 and lvol3)all others can be re-sized. The reason being that the first three logical volumes must be contiguous therefore if you absolutely need to re-size the first three logical volumes you can still do it online but you will need many more steps than just the standard "lvextend" followed by a "fsadm"

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