Hello everyone! There is storage IBM Storage DS 3521, which is multipath FC (8G) is connected to the IBM BladeCenter H, and it is given to the blades as a shared drive. The task - to prepare the shared storage for the blades which will LVM and hard drives virtual machine (Proxmox). When you create a volume storage requests segment size. In the document "VMware Implementation with IBM System Storage DS3500" is a section dedicated to this, the general sense of which - put 256Kb. But rather vmware file system for virtual machines, and here is pure LVM (block device). If who faced with a similar help advice .