Rorke Data Galaxy Aurora Series Configuration And System Integration Manual page 101

G A L A X Y ® A U R O U R A C O N F I G U R A T I O N A N D S Y S T E M I N T E G R A T I O N G U I D E
Transport protocol: Connection type - i.e. SAS or SATA
Local Time: Shows the time that this command was executed.
SMART Feature: Indicates whether or not the drive supports the SMART
feature, and whether or not it is enabled.
Temperature Warning: Indicates whether or not a temperature warning is
enabled or disabled.
Overall Health: Indicates the drive Health at the time this command was
executed.
Current Drive Temperature: This is the temperature (in Celcius) at the time
the command was executed.
Drive Trip Temperature: Indicates the maximum internal temperature that the
drive ever recorded.
Elements in Grown Defect List: The drive keeps track of different areas that
it can not write to. These are called "surface defects." There are two defect
lists: One is the Manufacturing Defect List, which contains defects that were
found when the manufacturer tested the drives. This list is fixed and never
changes. The other list is called a grown defect list, which is a list of defects
that occurs after the drive leaves the manufacturer. This list only gets bigger,
hence the "grown" name.
Vendor Cache Information: This is just a category heading which describes
the next 5 lines.
Blocks Sent to the Initiator: In the case of SAS, the host adapter channel is
called an initiator, while the drive itself is the target. This line indicates the
number of blocks of data sent to the initiator – in this case, the blocks are 512
bytes (sectors), however they may or may not be data from the disk – they
could also be SMART data such as the one which was requested here. Most
of the time, these are drive data sectors, so in general, this is the number of
sectors that has ever been read from the drive.
Blocks Received from the Initiator: In general, this is the number of sectors
written to the drive.
Blocks Read from Cache and sent to the Initiator: This is an indicator of
how efficient the caching is on the drive. If the computer (initiator) requested
the same block twice, and it happened to be in the cache of the drive, then the
drive would not have to read it again from the disks, so in general, this number
would be the same or always higher than the Blocks sent to the Initiator. The
higher the number goes, it means the less work the heads on the disks have to
do.
Number of Read or Write Commands who's size <= Segment Size: The
drive only sends data to the computer in groups of blocks, into an area of the
100 Section 3 Management