def detect_disks(hw_lst):
"""Detect disks."""
names = diskinfo.disknames()
sizes = diskinfo.disksizes(names)
disks = [name for name, size in sizes.items() if size > 0]
hw_lst.append(('disk', 'logical', 'count', str(len(disks))))
for name in disks:
diskinfo.get_disk_info(name, sizes, hw_lst)
# nvme devices do not need standard cache mechanisms
if not name.startswith('nvme'):
diskinfo.get_disk_cache(name, hw_lst)
diskinfo.get_disk_id(name, hw_lst)
# smartctl support
# run only if smartctl command is there
if which("smartctl"):
if name.startswith('nvme'):
sys.stderr.write('Reading SMART for nvme\n')
smart_utils.read_smart_nvme(hw_lst, name)
else:
smart_utils.read_smart(hw_lst, "/dev/%s" % name)
else:
sys.stderr.write("Cannot find smartctl, exiting\n")
def read_smart(hwlst, device, optional_flag=""):
if not which("smartctl"):
sys.stderr.write("Cannot find smartctl, exiting\n")
return
optional_string = ""
if optional_flag:
optional_string = " with %s" % optional_flag
if os.path.exists(device):
sys.stderr.write(
"read_smart: Reading S.M.A.R.T information on %s%s\n" %
(device, optional_string))
sdparm_cmd = subprocess.Popen("smartctl -a %s %s" %
(device,
optional_flag),
shell=True,
stdout=subprocess.PIPE)
for line in sdparm_cmd.stdout:
line = line.strip()
if isinstance(line, six.binary_type):
line = line.decode()
if (line.startswith("Device does not support SMART")
or ("Unavailable - device lacks SMART capability" in line)
or line.startswith(
"Device supports SMART and is Enabled")):
return read_smart_scsi(hwlst, device, optional_flag)
if line.startswith("ID#"):
return read_smart_ata(hwlst, device, optional_flag)
# If no ID# was found, let's retry with "-d ata"
if optional_flag == "":
return read_smart(hwlst, device, "-d ata")
sys.stderr.write("read_smart: no device %s\n" % device)
return