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2.12 SMART Info
Device:
Shows the manufacturer, model
number, and firmware revision of the de-‐
vice.
Serial Number:
Is the serial number: Note
that the actual serial number is just the
rightmost 8 characters. The rest of the
string is a manufacturer-‐unique ID.
Device Type:
Shows the type of the de-‐
vice.
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 wheth-‐
er 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 Celsius) 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 cannot
write to. These are called “surface defects.” There are two defect lists: One is the Manu-‐
facturing Defect List, which contains defects that were found when the manufacturer test-‐
ed 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 ini-‐
tiator, 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
QOS 8-Bay User Manual
QOS Server is a subsidary of Ocean Tides Productions Ltd. © Copyright 2013
