This is known limitation of DEFAULT settings of AIX LVM. But you're messing little bit with the terms. Partition can be only power of 2 in range 1-1024 MB. In AIX each physical volume consists of physical partitions (closest equivalent in PC world are cylinders) which can be no more than 1016 on single physical disk multiplied by VG factor. And all disks (physical volumes in AIX terms) in a VG have same physical partition size. Each logical volume (similar to partition in PC disks) consists of logical partitions which have up to three copies thus occupying corresponding number of physical partitions multiplied by one, two or three. Number of logical partitions in a logical volume is limited by default to 512 (but can be changed up to 32 512). So the size of a file system is limited by (PP size of VG) * (max PPs in LV). First parameter can be choosen only when VG was created but latter can be changed at any time. Suggest to your sysadmin to read AIX LVM concepts in "System Management Concepts: Operating System and Devices" book, Chapter 6 - Logical volumes. LVM is very flexible and scalable and its limits do exist but in terabytes area.
Zlatko Krastev IT Consultant "Klein, Robert (CIT)" <[EMAIL PROTECTED]> on 22.10.2001 16:47:44 Please respond to "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] cc: Subject: Setting up TSM on AIX We trying to set up a TSM server on AIX. The person setting up the server is an experienced Unix sysadmin, but is running into a problem defining partitions on the AIX box. The disk system is 350 GB RAID5. When she tries to set up a partition larger than 5 GB, she gets an error message. Anyone have any idea of what she might be doing wrong? Also, does anyone have suggestions on how best to set up the partitions (one partition for both the db/recovery logs and the disk storage pools, separate partitions, etc.?) I checked the ADSM-L archives for the last couple of years and did not see anything on this issue. > Thanks for any help you can provide. >
