optools/storage/badblocks.py

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#!/usr/bin/env python3
# Email alerts about disks if there are any errors found.
# It can take a LONG time depending on the speed/type of disk and size of disk.
# Should probably only cron it once a week or so.
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import datetime
import os
import subprocess
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import sys
# needs badblocks, smartctl, and parted installed also
def getDisks():
disks = []
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with open(os.devnull, 'w') as _DEVNULL:
_rawlist = subprocess.run(['parted',
'--list',
'--machine',
'--script'],
stdout = subprocess.PIPE,
stderr = _DEVNULL).stdout.decode('utf-8')
for l in _rawlist.splitlines():
if l in ('', 'BYT;'):
continue # Skip empty lines and markers for new devices
elif l.startswith('/'):
# It's a device path.
_l = l.split(':')
if _l[2] not in ('md', 'dm'): # Skip non-block devices like MDADM arrays, LVM volumes
if _l[0] not in disks:
disks.append(_l[0])
return(disks)
def chkDisk(disk):
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d = '.'.join(os.path.split(disk)[1:])
os.makedirs('/var/log/badblocks', exist_ok = True)
if os.path.isfile('/var/log/badblocks/{0}.log'.format(d)):
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# for some reason this file was just created within the past 24 hours,
# so we better play it safe and write to a different log file
now = datetime.datetime.now()
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modified = datetime.datetime.fromtimestamp(os.path.getmtime('/var/log/badblocks/{0}.log'.format(d)))
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diff = now - modified
timedelta = datetime.timedelta(days = 1)
if not diff >= timedelta:
d += '_secondary'
bb = ['badblocks',
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'-o', '/var/log/badblocks/{0}.log'.format(d),
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disk]
smctl = ['smartctl',
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'-t', 'long',
'-d', 'sat',
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disk]
with open(os.devnull, 'w') as DEVNULL:
for c in (bb, smctl):
subprocess.run(c, stdout = DEVNULL)
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return()
def userChk():
# Needs to be run as root/with sudo, because of e.g. cryptsetup, etc.
if os.geteuid() != 0:
raise PermissionError('This script must be run with root privileges.')
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def main():
userChk()
for d in getDisks():
chkDisk(d)
if __name__ == '__main__':
main()