private DiskOfferingVO createdefaultDiskOffering(Long domainId, String name, String description, ProvisioningType provisioningType,
int numGibibytes, String tags, boolean isCustomized, boolean isSystemUse) {
long diskSize = numGibibytes;
diskSize = diskSize * 1024 * 1024 * 1024;
tags = cleanupTags(tags);
DiskOfferingVO newDiskOffering = new DiskOfferingVO(domainId, name, description, provisioningType, diskSize, tags, isCustomized, null, null, null);
newDiskOffering.setUniqueName("Cloud.Com-" + name);
newDiskOffering.setSystemUse(isSystemUse);
newDiskOffering = _diskOfferingDao.persistDeafultDiskOffering(newDiskOffering);
return newDiskOffering;
}