ZyXEL Communications NSA 210 User Manual page 302

Chapter 10 Package Management
Table 85 S.M.A.R.T. Attributes (continued)
ATTRIBUTE
ID
NAME
19 Power-off
2 Retract Count
19 Load/Unload
3 Cycle
19 Temperature
4
19 Hardware ECC
5 Recovered
19 Reallocation
6 Event Count
19 Current
7 Pending Sector
Count
19 Uncorrectable
8 Sector Count
19 UltraDMA CRC
9 Error Count
20 Write Error
0 Rate / Multi-
Zone Error
Rate
20 Soft Read Error
1 Rate
20 Data Address
2 Mark Errors
20 Run Out Cancel
3
20 Soft ECC
4 Correction
20 Thermal
5 Asperity Rate
(TAR)
20 Flying Height
6
20 Spin High
7 Current
302
BETTE
DESCRIPTION
R
Low This is how many times the heads are loaded off the
media.
Low This is the number of load and unload cycles into head
landing zone position.
Low This is the hard drive's internal temperature.
High This is the time between ECC (Error Correction Code)-
corrected errors.
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.
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.
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.
Low This is the number of data transfer errors through the
interface cable according to the ICRC (Interface Cyclic
Redundancy Check).
Low This is the total number of errors in writing sectors.
Low This is the number of read/write head off-track errors. If
the value is not zero, make a backup.
Low This is the number of data address mark errors. This
could also be a different, manufacturer-specific attribute.
Low This is the number of ECC (Error Correction Code) errors.
Low This is the number of errors corrected by software ECC
(Error Correction Code).
Low This is the number of thermal asperity errors. Thermal
asperity is a read signal spike caused by sensor
temperature rise due to touching the disk surface or
contaminant particles.
This is the height of the hard drive's read/write heads
above the disk surface.
This is the quantity of high current used to spin up the
drive.
NSA210 User's Guide