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use strict;
use warnings;
...
my @command_output = <$fh>;
close $fh 
  or carp "ERROR: Couldn't close filehandle: $ERRNO\n";

Checking for SCSI ID:0
ioc:0 vol_id:0 type:IM raidlevel:RAID-1 num_disks:2 size(GB):148 state
+: OPTIMAL flags: ENABLED
...
ioc:0 spare_id:2 scsi_id:255 vendor: product_id: revision: size(GB):14
+9 state: MISSING flags: OUT_OF_SYNC sync_state: n/a ASC/ASCQ:0x00/0x0
+0 SMART ASC/ASCQ:0x00/0x00
scsi_id:1 100%
scsi_id:0 100%