ZyXEL Communications manual 282

Chapter 11 Packages

Table 93 S.M.A.R.T. Attributes			(continued)
ID	ATTRIBUTE	BETTER	DESCRIPTION
	NAME
190	Temperature	High	This indicates the value of 100 - the temperature in degrees Celsius.
	Difference from		Manufacturers can set a minimum threshold that corresponds to a
	100		maximum temperature.
191	G-sense error	Low	This is the number of mistakes caused by impact loads.
	rate
192	Power-off Retract	Low	This is how many times the heads are loaded off the media.
	Count
193	Load/Unload	Low	This is the number of load and unload cycles into head landing zone
	Cycle		position.
194	Temperature	Low	This is the hard drive’s internal temperature.
195	Hardware ECC	High	This is the time between ECC (Error Correction Code)-corrected errors.
	Recovered
196	Reallocation	Low	This is the total number of reallocation (remap) operations. The raw value
	Event Count		is the total attempts to move data from reallocated sectors to a spare
			area. Successful and unsuccessful attempts are both included.
197	Current Pending	Low	This is the number of unstable sectors awaiting reallocation. If the sector
	Sector Count		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.
198	Uncorrectable	Low	This is the number of errors reading or writing a sector that were not
	Sector Count		correctable. An increase in this value is an indicator of disk surface
			defects or mechanical subsystem problems.
199	UltraDMA CRC	Low	This is the number of data transfer errors through the interface cable
	Error Count		according to the ICRC (Interface Cyclic Redundancy Check).
200	Write Error Rate	Low	This is the total number of errors in writing sectors.
	/ Multi-Zone
	Error Rate
201	Soft Read Error	Low	This is the number of read/write head off-track errors. If the value is not
	Rate		zero, make a backup.
202	Data Address	Low	This is the number of data address mark errors. This could also be a
	Mark Errors		different, manufacturer-specific attribute.
203	Run Out Cancel	Low	This is the number of ECC (Error Correction Code) errors.
204	Soft ECC	Low	This is the number of errors corrected by software ECC (Error Correction
	Correction		Code).
205	Thermal Asperity	Low	This is the number of thermal asperity errors. Thermal asperity is a read
	Rate (TAR)		signal spike caused by sensor temperature rise due to touching the disk
			surface or contaminant particles.
206	Flying Height		This is the height of the hard drive’s read/write heads above the disk
			surface.
207	Spin High		This is the quantity of high current used to spin up the drive.
	Current
208	Spin Buzz		This is the number of buzz routines to spin up the drive. When the arm
			holding the read/write heads is stuck, the motor driving it tries to oscillate
			the arm to free it. This causes an audible vibration.
209	Offline Seek		This is the hard drive’s seek performance during offline operations. Offline
	Performance		operations are tests the drive does itself as opposed to those that an
			external diagnostic tool has it do. Seek performance is how quickly the
			drive moves from track to track.

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	Media Server User’s Guide