Disk-SMART-Perl

=head1 NAME

Disk::SMART - Provides an interface to smartctl to return disk stats and to run tests.

=head1 SYNOPSIS

Disk::SMART is an object oriented module that provides an interface to get SMART disk info from a device as well as initiate testing. An exmple script using this module can be found at https://github.com/paultrost/linux-geek/blob/master/sysinfo.pl

use Disk::SMART;

my $smart = Disk::SMART->new('/dev/sda', '/dev/sdb');

my $disk_health = $smart->get_disk_health('/dev/sda');

=head1 CONSTRUCTOR

=head2 B

Instantiates the Disk::SMART object

C - Device identifier of a single SSD / Hard Drive, or a list. If no devices are supplied then it runs get_disk_list() which will return an array of detected sdX and hdX devices.

my $smart = Disk::SMART->new();
my $smart = Disk::SMART->new( '/dev/sda', '/dev/sdb' );
my @disks = $smart->get_disk_list();

Returns C object if smartctl is available and can poll the given device(s).

=head1 USER METHODS

=head2 B

Returns hash of the SMART disk attributes and values

C - Device identifier of a single SSD / Hard Drive

my %disk_attributes = $smart->get_disk_attributes('/dev/sda');

=head2 B

Returns scalar of any listed errors

C - Device identifier of a single SSD/ Hard Drive

my $disk_errors = $smart->get_disk_errors('/dev/sda');

=head2 B

Returns the health of the disk. Output is "PASSED", "FAILED", or "N/A". If the device has positive values for the attributes listed below then the status will output that information.

Eg. "FAILED - Reported_Uncorrectable_Errors = 1"

The attributes are:

5 - Reallocated_Sector_Count

187 - Reported_Uncorrectable_Errors

188 - Command_Timeout

197 - Current_Pending_Sector_Count

198 - Offline_Uncorrectable

If Reported_Uncorrectable_Errors is greater than 0 then the drive should be replaced immediately. This list is taken from a study shown at https://www.backblaze.com/blog/hard-drive-smart-stats/


C - Device identifier of a single SSD / Hard Drive

my $disk_health = $smart->get_disk_health('/dev/sda');

=head2 B

Returns list of detected hda and sda devices. This method can be called manually if unsure what devices are present.

$smart->get_disk_list;

=head2 B

Returns the model of the device. eg. "ST3250410AS".

C - Device identifier of a single SSD / Hard Drive

my $disk_model = $smart->get_disk_model('/dev/sda');

=head2 B

Returns an array with the temperature of the device in Celsius and Farenheit, or N/A.

C - Device identifier of a single SSD / Hard Drive

my ($temp_c, $temp_f) = $smart->get_disk_temp('/dev/sda');

=head2 B

Runs the SMART short self test and returns the result.

C - Device identifier of SSD/ Hard Drive

$smart->run_short_test('/dev/sda');

=head2 B

Updates the SMART output and attributes for each device. Returns undef.

C - Device identifier of a single SSD / Hard Drive or a list of devices. If none are specified then get_disk_list() is called to detect devices.

$smart->update_data('/dev/sda');

=head1 COMPATIBILITY

This module should run on any UNIX like OS with Perl 5.10+ and the smartctl progam installed from the smartmontools package.

=head1 AUTHOR

Paul Trost

=head1 LICENSE AND COPYRIGHT

Copyright 2015 by Paul Trost
This script is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License v2, or at your option any later version.