Drive Health; Drive Health Display - ATTO Technology SC 5550E Installation And Operation Manual

Drive Health

FastStream provides access to drive data which may
help estimate the drive health of SAS or SATA disk
drives. This data is provided through SMART or
Informational Exceptions provided by the drive
manufacturer and the results may be subjective and
differ by manufacturer.
For SAS drives, a Read Defect Data command is sent
to the drives. If supported, the drive will respond with
its internal count of defective LBAs (Logical Blocking
Addresses) containing medium defects. A high or
rapidly increasing count could indicate the drive may
be failing or about to fail. Informational Exceptions are
received by reading the drive's Informational
Exceptions Control mode page. These are internal
errors detected by the drive during background scans,
self test or vendor specific operations and can lead to
a myriad of possible results, including catastrophic
failures. Usually the number will be 0 (zero). A high or
Exhibit 6.0-2 Drive Health Data tab
rapidly increasing count could indicate the drive may
be failing or is about to fail.
For SATA drives, Self-Monitoring, Analysis and
Reporting Technology or S.M.A.R.T. is available to
monitor hard disk drives for detection and reporting on
various indicators of reliability. This is provided by
drive manufacturers in the hope of anticipating drive
failures before they fail so a user may replace a drive
before data has a chance to be lost.
Note
The FastStream provides this data from the
drives and it is up to the user to determine if
this data may be predicting a failure

Drive Health Display

This information is accessed from the Health Data Tab
in the Drive Performance and Health page. It displays
drive health data for SAS and/or SATA drives.
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