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Chapter 10 Package Management
NSA320 User’s Guide
283
19
0
Airflow
Temperature
Low This indicates the temperature of the airflow measured
by a Western Digital hard drive.
19
0
Temperature
Difference
from 100
High This indicates the value of 100 - the temperature in
degrees Celsius. Manufacturers can set a minimum
threshold that corresponds to a maximum temperature.
19
1
G-sense error
rate
Low This is the number of mistakes caused by impact loads.
19
2
Power-off
Retract Count
Low This is how many times the heads are loaded off the
media.
19
3
Load/Unload
Cycle
Low This is the number of load and unload cycles into head
landing zone position.
19
4
Temperature Low This is the hard drive’s internal temperature.
19
5
Hardware ECC
Recovered
High This is the time between ECC (Error Correction Code)-
corrected errors.
19
6
Reallocation
Event Count
Low This is the total number of reallocation (remap)
operations. The raw value is the total attempts to move
data from reallocated sectors to a spare area. Successful
and unsuccessful attempts are both included.
19
7
Current
Pending Sector
Count
Low This is the number of unstable sectors awaiting
reallocation. If the sector is later successfully written or
read, this value decreases and reallocation is not
performed. Only failed write attempts cause a
reallocation, not read errors. This can be difficult to test
since only direct I/O writes to the disk cause
reallocations, not cached writes.
19
8
Uncorrectable
Sector Count
Low This is the number of errors reading or writing a sector
that were not correctable. An increase in this value is an
indicator of disk surface defects or mechanical subsystem
problems.
19
9
UltraDMA CRC
Error Count
Low This is the number of data transfer errors through the
interface cable according to the ICRC (Interface Cyclic
Redundancy Check).
20
0
Write Error
Rate / Multi-
Zone Error
Rate
Low This is the total number of errors in writing sectors.
20
1
Soft Read Error
Rate
Low This is the number of read/write head off-track errors. If
the value is not zero, make a backup.
20
2
Data Address
Mark Errors
Low This is the number of data address mark errors. This
could also be a different, manufacturer-specific attribute.
20
3
Run Out Cancel Low This is the number of ECC (Error Correction Code) errors.
20
4
Soft ECC
Correction
Low This is the number of errors corrected by software ECC
(Error Correction Code).
Table 81 S.M.A.R.T. Attributes (continued)
ID
ATTRIBUTE
NAME
BETTE
R
DESCRIPTION