HPUX: A disk pair with a PV, multiple PVs form a VG, can be divided into multiple LVs on the VG; specify the size of the PV film when creating the VG (-s parameter, the size must be 2 power, 1 -256M), physical extent; Physical Extent in the same VG is the same; how many logical extents are specified when creating LV; Physical Extent and Logical Extent are one corresponding; PVG is a plurality of PV combinations, one The VG may contain multiple PVG; the PVG name in the same VG cannot be the same, and the different VG can be the same; 1. A physical hard disk (PV) can only belong to a volume group (VG) 2. The maximum logical volume (LV) in a VG is 255 3. Each PV maximum PE number is 65536, the default value is 1016, and 4 can be set via VGCReate -e when creating a VG. The maximum number of PVs in each VG is 255, the default value is 16, and 5 can be set via VGCReate -P when creating VG. Logical Extent in a LV can be AIX on multiple PVs: corresponding to PE-> PP, basically the same as HPUX, the relevant command has a little difference, a PVG occupies an adapter interface, an interface of each PV in PVG, specifically How many PVG can be supported by the hardware by hardware. When I have time, I will add the picture.
