Every professionally used server should have its disk drives monitored. It is a bit surprising that smartmontools are not installed by default on Citrix XenServer, but fortunately this is easy to fix.
Disk drives will eventually fail! Do use smartmontools!
I am running smartmontools for a few years now, and I have already received several warning emails about failing disk drives. Often, if you know that a disk drive is about to fail, you still have time to gracefully shut down virtual machines, run backups etc.
Installing and configuring smartmontools on Citrix XenServer (or any other Linux system) is trivial and absolutely worth the time.
General installation
To install smartmontools on a general Linux system (not XenServer), run
yum install smartmontools
or
apt-get install smartmontools
Installation on Citrix XenServer
Citrix XenServer 5.5, 5.6 and 6.0 are based on CentOS 5.4, but the smartmontools package is not available in the default Citrix repository, so it can't be installed with yum install smartmontools
(as it would be possible with any other CentOS distribution).
It is probably safest to use the same versions that were in the original CentOS 5.4 distribution. Since that release is no longer the latest, we have to go to an archive server to find the packages. The packages listed below are actually used in other CentOS releases too, so these are probably the latest versions anyway.
wget http://vault.centos.org/5.4/os/i386/CentOS/mailx-8.1.1-44.2.2.i386.rpm wget http://vault.centos.org/5.4/os/i386/CentOS/smartmontools-5.38-2.el5.i386.rpm rpm -hiv smartmontools-5.38-2.el5.i386.rpm mailx-8.1.1-44.2.2.i386.rpm warning: smartmontools-5.38-2.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID e8562897 Preparing... ########################################### [100%] 1:mailx ########################################### [ 50%] 2:smartmontools ########################################### [100%]
Checking the disk status
We can now retrieve the disk status using smartctl -d ata -a /dev/sda
. The most important fields are : SMART overall-health self-assessment test result
- that should always have a value of PASSED
. Other important fields are:
Reallocated_Sector_Ct
, which counts the number of bad blocks that have been reallocated. It should be a low number. If this value increases, it is an alarm signal. Make a backup and replace the disk drive.Current_Pending_Sector
, which is the number of blocks with read errors that are not yet reallocated.Offline_Uncorrectable
.
Also check out the columns VALUE WORST THRESH
. For each attribute, the current value of the field should never be lower than the threshold defined by the manufacturer.
smartctl -d ata -a /dev/sda smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF INFORMATION SECTION === Device Model: ST31500341AS Serial Number: 9VS1Y9GE Firmware Version: CC1H User Capacity: 1,500,301,910,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: ATA-8-ACS revision 4 Local Time is: Wed Mar 2 22:37:23 2011 CET SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED General SMART Values: Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever been run. Total time to complete Offline data collection: ( 625) seconds. Offline data collection capabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine recommended polling time: ( 1) minutes. Extended self-test routine recommended polling time: ( 255) minutes. Conveyance self-test routine recommended polling time: ( 2) minutes. SCT capabilities: (0x103f) SCT Status supported. SCT Feature Control supported. SCT Data Table supported. SMART Attributes Data Structure revision number: 10 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x000f 108 099 006 Pre-fail Always - 20188464 3 Spin_Up_Time 0x0003 100 100 000 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 5 5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 2 7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail Always - 212504152 9 Power_On_Hours 0x0032 083 083 000 Old_age Always - 14961 10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0 12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 5 184 Unknown_Attribute 0x0032 100 100 099 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 188 Unknown_Attribute 0x0032 100 098 000 Old_age Always - 29 189 High_Fly_Writes 0x003a 001 001 000 Old_age Always - 143 190 Airflow_Temperature_Cel 0x0022 064 050 045 Old_age Always - 36 (Lifetime Min/Max 22/47) 194 Temperature_Celsius 0x0022 036 050 000 Old_age Always - 36 (0 19 0 0) 195 Hardware_ECC_Recovered 0x001a 049 011 000 Old_age Always - 20188464 197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 43379169704557 241 Unknown_Attribute 0x0000 100 253 000 Old_age Offline - 3426517151 242 Unknown_Attribute 0x0000 100 253 000 Old_age Offline - 6452474 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Short offline Completed without error 00% 14961 - SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay.
Running tests manually
To test a drive, issue either a short (smartctl -d ata -t short /dev/sda)
or a long (smartctl -d ata -t long /dev/sda)
internal self test. These tests are not destructive and can be executed during normal usage. A short test will complete in a couple of minutes, while a long test can run for hours.
smartctl -d ata -t long /dev/sda smartctl version 5.38 [i686-redhat-linux-gnu] Copyright (C) 2002-8 Bruce Allen Home page is http://smartmontools.sourceforge.net/ === START OF OFFLINE IMMEDIATE AND SELF-TEST SECTION === Sending command: "Execute SMART Extended self-test routine immediately in off-line mode". Drive command "Execute SMART Extended self-test routine immediately in off-line mode" successful. Testing has begun. Please wait 255 minutes for test to complete. Test will complete after Fri Mar 4 12:45:52 2011 Use smartctl -X to abort test.
Check the disk status with smartctl -d ata -a /dev/sda
after the self-test completes.
Automatic monitoring of disk drives
The smartd
daemon handles automatic testing for all drives, logs any status changes in /var/log/syslog
or /var/log/messages
and sends a status email in case of a problem (if mail es enabled, see below). It is configured in the file /etc/smartd.conf
.
The following lines will run a short test every day between 02:00 and 03:00, and a long test on every Saturday between 03:00 and 04:00. If there is a problem, send an email to the configured address. The -M test
option will send a test email whenever the smartd
daemon is started.
The DEVICESCAN
line would normally cause default test runs for all disks that smartd
finds, but does not work on my system for some reason. So it is commented out and the tests will only run for explicitly listed devices.
/dev/sda -d ata -a -s (S/../.././02|L/../../6/03) -t -m arne@schirmacher.de /dev/sdb -d ata -a -s (S/../.././02|L/../../6/03) -t -m arne@schirmacher.de #DEVICESCAN -H -m root
After any change to the /etc/smartd.conf
file the smartd
daemon should be restarted: /etc/init.d/smartd restart
Enabling email on Citrix XenServer
Citrix XenServer is not configured to run a mail server. Therefore without further configuration smartd
might attempt to send out warning emails in case anything fails, but no mails will actually receive their destination.
It is fortunately not necessary to install a full-blown email package. XenServer comes with ssmtp preinstalled, which simply forwards emails to a real mail server.
To enable mail sending on Citrix XenServer, set up /etc/ssmtp/ssmtp.conf
. You need to provide a real mail server and the local domain name.
# # /etc/ssmtp.conf -- a config file for sSMTP sendmail. # root=postmaster mailhub=mail.pixsoftware.de rewriteDomain=pixsoftware.de hostname=server32.pixsoftware.de
After setting up /etc/ssmtp/ssmtp.conf
, send a test email from the console to make sure that the email gets through:
echo "this is a test mail" | mailx -s "Test mail" arne@schirmacher.de
If you are using the -M test
option to a /etc/smartd.conf
device definition, you can also restart the smartd
daemon to have it send out test emails.
See also
Monitoring Hard Disks with SMART
smartmontools Website
Festplatten mit SMART überwachen
11 Comments
Anonymous
This is by far the best tutorial for xenserver I have used in a long time. I have spent untold hours trying to set up nagios with one of the main purposes being monitoring the local hard drives. I could never get it set up to really do what it needed to. I am very glad I found this. Thank you so much!!
Anonymous
this version does not work with LSI controllers. From what i can understand you need at least version 5.39.
Can someone kindly provide a link to this version for use in Xenserver 6.0?
Administrator
I did not find smartmontools 5.39 in a package for CenOS 5.x, only for CentOS 6. Maybe a Fedora package works with XenServer. If all else fails, you could download the source code (SRPM) and build your own smartmontools package.
Here is a list of all kinds of smartmontools packages: http://pkgs.org/download/smartmontools
Anonymous
Thank you Arne
I wish it was that simple! but although i can install and administer Xenserver, i am still a newbie with Linux.This post was perfect, all worked well but not suitable for LSI cards, so maybe there is a volunteer out their to update it with a later smartmon version.
When i tried, i kept getting failures due to dependencies and the list is quite long.
Would appreciate any help you can offer.
Regards
Aldo
Administrator
I have now created a package that works with LSI controllers: see Configuring smartmontools for LSI 9750 RAID Controller on XenServer.
Anonymous
Hello Arne,
I found your articles and have tried to get the SMART going on my Citrix Xenserver.
But it comes with SMART not supported, but it should be supported by this controller MegaRAID 8704EM2
Question, is this controller in your package?
Any help much appreciated
http://sourceforge.net/apps/trac/smartmontools/wiki/Supported_RAID-Controllers#8
Hardware info:
Citrix XenServer 5.6.0-31188p
In console, RAID bus controller, MegaRAID SAS 1078
[root@server ~]# smartctl -a /dev/sda
smartctl 5.42 2011-10-20 r3458 [i686-linux-2.6.27.42-0.1.1.xs5.6.0.44.111158xen] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
Vendor: LSI
Product: MegaRAID 8704EM2
Revision: 1.40
User Capacity: 1,998,912,094,208 bytes [1.99 TB]
Logical block size: 512 bytes
Logical Unit id: 0x600605b001b679b013c0e6474c8fdef0
Serial number: 00f0de8f4c47e6c013b079b601b00506
Device type: disk
Local Time is: Wed Feb 8 14:06:14 2012 GMT
Device does not support SMART
Error Counter logging not supported
Device does not support Self Test logging
Anonymous
Hi Arne,
I found the information of the devices in a previous screenshot I made of the server.
Device IDs are 4,5,6,7, using megaraid did not work and suggested to use the buggy sat+megaraid.
This now shows the following information.
smartctl -i -d sat+megaraid,4 /dev/sda
smartctl 5.42 2011-10-20 r3458 [i686-linux-2.6.27.42-0.1.1.xs5.6.0.44.111158xen] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Model Family: Western Digital RE4-GP
Device Model: WDC WD2002FYPS-01U1B1
Serial Number: WD-WCAVY4062234
LU WWN Device Id: 5 0014ee 259e46bc3
Firmware Version: 04.05G05
User Capacity: 2,000,398,934,016 bytes [2.00 TB]
Sector Size: 512 bytes logical/physical
Device is: In smartctl database [for details use: -P show]
ATA Version is: 8
ATA Standard is: Exact ATA specification draft version not indicated
Local Time is: Sun Feb 12 21:48:31 2012 GMT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
A small step further...
Not sure how to build up the smartd.conf file to get an email if there is a problem with the disk.
Any idea?
Many thanks.
Administrator
If the MegaRAID 8704EM2 controller is supported by smartmontools-5.42, then it should be also supported by the smartmontools package for XenServer that you can download here. But I don't have the controller available so I can't test it. Let me know if you get it working.
Anonymous
Hi Arne, I got it installed and modified the smartd.conf
vi /etc/smartd.conf
/dev/sda -d sat+megaraid,4 -a -s S/../.././6 -t -m email@address repeated for each drive.
However I noticed a real performance issue, not sure if it was down to the test on each drive or just that smartd was not running very well with my Citrix Xenserver version.
Because I had it running on a production server I had to remove it to get the performance back.
No idea why it caused this performance issue
Not sure now how to monitor my drives now for failure..
Cheers.
Anonymous
Hey Arne, Great info. I'm curious, how difficult was it to build and could you offer some tips. I'd like to build 5.43 version is possible.
Cheers,
C
Anonymous
installing smartmontools on xenserver:
yum --enablerepo=base install smartmontools