4.5. Monitoring Physical Disks

The S.M.A.R.T. status of physical disks is monitored by the smartctl tool installed along with Virtuozzo Infrastructure Platform. For it to work, S.M.A.R.T. functionality must be enabled in node’s BIOS. The tool is run every 10 minutes as a cron job also added during installation. The smartctl tool polls all physical disks attached to nodes in the cluster, including caching and journaling SSDs, and reports the results to the MDS server.

You can view disk poll results for the last 10 minutes in the output of the vstorage top command. For example:

../_images/image027.png

If the SMART warning message is shown in the main table, one of the physical disks is in pre-failure condition according to S.M.A.R.T. Press d to switch to the disks table to see more details. For example:

../_images/image028.png

The disks table shows the following parameters:

DISK
Disk name assigned by operating system.
SMART

Disk’s S.M.A.R.T. status:

OK
The disk is healthy.
Warn

The disk is in pre-failure condition. Pre-failure condition means that at least one of these S.M.A.R.T. counters is nonzero:

  • Reallocated Sector Count
  • Reallocated Event Count
  • Current Pending Sector Count
  • Offline Uncorrectable
TEMP
Disk temperature in Celsius.
CAPACITY
Disk capacity.
SERIAL
Disk serial number.
MODEL
Disk model.
HOST
Disk’s host address.

To disable S.M.A.R.T. disk monitoring, delete the corresponding cron job.