example code using libstoragemgmt to gather HBA RAID info

lsm-hba.py

from collections import namedtuple

import lsm

_hba_plugin_uris = ("hpsa://", "megaraid://")
HBAVolumeInfo = namedtuple('HBAVolumeInfo', ['system', 'nodes', 'raid_type', 'raid_stripe_size'])
""" lighweight data structure containing HBA RAID info:

        system (str): descriptive name of HBA unit
        nodes (list of str): list of device node paths for the volume
        raid_type (int): one of the lsm.Volume.RAID_TYPE_* constants
        raid_stripe_size (int): stripe size in bytes
"""

def get_volume_info():
    """ Return a list of namedtuples containing basic HBA RAID info. """
    volumes = []
    for uri in _hba_plugin_uris:
        client = lsm.Client(uri)
        systems = dict((s.id, s) for s in client.systems())
        for vol in client.volumes():
            nodes = lsm.LocalDisk.vpd83_search(vol.vpd83)
            system = systems[vol.system_id] 
            caps = client.capabilities(system)
            if caps.supported(lsm.Capabilities.VOLUME_RAID_INFO):
                raid_info = client.volume_raid_info(vol)
            else:
                raid_info = [None, None, None, None]

            volumes.append(HBAVolumeInfo(system.name, nodes, *raid_info[:2]))

    return volumes

if __name__ == "__main__":
    import pprint
    pprint.pprint(get_volume_info())