C7) UDMA 校验错误计数 hdtune的意思？

nyj

C7) UDMA 校验错误计数  hdtune的意思？
这个我、有一块硬盘有数据了，数据室100，具体是什么意思？

Peter-Huang

我也不清楚，友情帮顶了。

nyj

自己顶顶

bcyj

这个就是硬盘线传输时出错的次数，硬盘线的质量不好而出现的机会比较大

scowj

smart每条的意思
这下非常清楚了吧?


Known ATA S.M.A.R.T. attributes

This article may contain original research or unverified claims. Please improve the article by adding references. See the talk page for details. (September 2007)

The following chart lists some S.M.A.R.T. attributes and the typical meaning of their raw values. Normalized values are always mapped so that higher values are better (with only very rare exceptions such as the "Temperature" attribute on certain Seagate drives[12]), but higher raw attribute values may be better or worse depending on the attribute and manufacturer. For example, the "Reallocated Sectors Count" attribute's normalized value decreases as the number of reallocated sectors increases. In this case, the attribute's raw value will often indicate the actual number of sectors that were reallocated, although vendors are in no way required to adhere to this convention. As manufacturers do not necessarily agree on precise attribute definitions and measurement units, the following list of attributes should be regarded as a general guide only.

scowj

ID	Hex	Attribute name	Better	Description
01	01	Read Error Rate		Indicates the rate of hardware read errors that occurred when reading data from a disk surface. A non-zero value indicates a problem with either the disk surface or read/write heads. Note that Seagate drives often report a raw value that is very high even on new drives, and does not thereby indicate a failure.
02	02	Throughput Performance		Overall (general) throughput performance of a hard disk drive. If the value of this attribute is decreasing there is a high probability that there is a problem with the disk.
03	03	Spin-Up Time		Average time of spindle spin up (from zero RPM to fully operational [millisecs]).
04	04	Start/Stop Count		A tally of spindle start/stop cycles. The spindle turns on, and hence the count is increased, both when the hard disk is turned on after having before been turned entirely off (disconnected from power source) and when the hard disk returns from having previously been put to sleep mode. [13]
05	05	Reallocated Sectors Count		Count of reallocated sectors. When the hard drive finds a read/write/verification error, it marks this sector as "reallocated" and transfers data to a special reserved area (spare area). This process is also known as remapping, and "reallocated" sectors are called remaps. This is why, on modern hard disks, "bad blocks" cannot be found while testing the surface – all bad blocks are hidden in reallocated sectors. However, as the number of reallocated sectors increases, the read/write speed tends to decrease. The raw value normally represents a count of the number of bad sectors that have been found and remapped. Thus, the higher the attribute value, the more sectors the drive has had to reallocate.
06	06	Read Channel Margin		Margin of a channel while reading data. The function of this attribute is not specified.
07	07	Seek Error Rate		Rate of seek errors of the magnetic heads. If there is a partial failure in the mechanical positioning system, then seek errors will arise. Such a failure may be due to numerous factors, such as damage to a servo, or thermal widening of the hard disk. More seek errors indicates a worsening condition of a disk’s surface or the mechanical subsystem, or both. Note that Seagate drives often report a raw value that is very high, even on new drives, and this does not normally indicate a failure.[citation needed]
08	08	Seek Time Performance		Average performance of seek operations of the magnetic heads. If this attribute is decreasing, it is a sign of problems in the mechanical subsystem.
09	09	Power-On Hours (POH)		Count of hours in power-on state. The raw value of this attribute shows total count of hours (or minutes, or seconds, depending on manufacturer) in power-on state.
10	0A	Spin Retry Count		Count of retry of spin start attempts. This attribute stores a total count of the spin start attempts to reach the fully operational speed (under the condition that the first attempt was unsuccessful). An increase of this attribute value is a sign of problems in the hard disk mechanical subsystem.
11	0B	Recalibration Retries		This attribute indicates the number of times recalibration was requested (under the condition that the first attempt was unsuccessful). An increase of this attribute value is a sign of problems in the hard disk mechanical subsystem.
12	0C	Power Cycle Count		This attribute indicates the count of full hard disk power on/off cycles.
13	0D	Soft Read Error Rate		Uncorrected read errors reported to the operating system.
184	B8	End-to-End error		This attribute is a part of HP's SMART IV technology and it means that after transferring through the cache RAM data buffer the parity data between the host and the hard drive did not match.
187	BB	Reported Uncorrectable Errors		A number of errors that could not be recovered using hardware ECC (see attribute 195).
188	BC	Command Timeout		A number of aborted operations due to HDD timeout. Normally this attribute value should be equal to zero and if you have values far above zero, then most likely you have some serious problems with your power supply or you have an oxidized data cable.
189	BD	High Fly Writes		HDD producers implement a Fly Height Monitor that attempts to provide additional protections for write operations by detecting when a recording head is flying outside its normal operating range. If an unsafe fly height condition is encountered, the write process is stopped, and the information is rewritten or reallocated to a safe region of the hard drive. This attribute indicates the count of these errors detected over the lifetime of the drive. This feature is implemented in most modern Seagate drives[citation needed] and some of Western Digital’s drives, beginning with the WD Enterprise WDE18300 and WDE9180 Ultra2 SCSI hard drives, and will be included on all future WD Enterprise products.[14]

scowj

190	BE	Airflow Temperature (WDC)		Airflow temperature on Western Digital HDs (Same as temp. [C2], but current value is 50 less for some models. Marked as obsolete.)
190	BE	Temperature Difference from 100		Value is equal to (100 – temp. °C), allowing manufacturer to set a minimum threshold which corresponds to a maximum temperature. (Seagate only?)[citation needed] Seagate ST910021AS: Verified Present[citation needed] Seagate ST9120823ASG: Verified Present under name "Airflow Temperature Cel" 2008-10-06 Seagate ST3802110A: Verified Present 2007-02-13[citation needed] Seagate ST980825AS: Verified Present 2007-04-05[citation needed] Seagate ST3320620AS: Verified Present 2007-04-23[citation needed] Seagate ST3500641AS: Verified Present 2007-06-12[citation needed] Seagate ST3250824AS: Verified Present 2007-08-07[citation needed] Seagate ST3250620AS: Verified Present Seagate ST31000340AS: Verified Present 2008-02-05[citation needed] Seagate ST31000333AS: Verified Present 2008-11-24[citation needed] Seagate ST3160211AS: Verified Present 2008-06-12[citation needed] Seagate ST3320620AS: Verified Present 2008-06-12[citation needed] Seagate ST3400620AS: Verified Present 2008-06-12[citation needed] Samsung HD501LJ: Verified Present under name "Airflow Temperature" 2008-03-02[citation needed] Samsung HD753LJ: Verified Present under name "Airflow Temperature" 2008-07-15[citation needed]
191	BF	G-sense error rate		Frequency of mistakes as a result of impact loads[citation needed]
192	C0	Power-off Retract Count		Number of times the heads are loaded off the media. Heads can be unloaded without actually powering off.[citation needed] (or Emergency Retract Cycle count – Fujitsu)[15]
193	C1	Load/Unload Cycle Count		Count of load/unload cycles into head landing zone position.[16]
194	C2	Temperature		Current internal temperature.
195	C3	Hardware ECC Recovered		Time between ECC-corrected errors[citation needed] or number of ECC on-the-fly errors. Sources differ on this point.[17]
196	C4	Reallocation Event Count		Count of remap operations. The raw value of this attribute shows the total number of attempts to transfer data from reallocated sectors to a spare area. Both successful & unsuccessful attempts are counted.
197	C5	Current Pending Sector Count		Number of "unstable" sectors (waiting to be remapped). If the unstable sector is subsequently written or read successfully, this value is decreased and the sector is not remapped. Read errors on the sector will not remap the sector, it will only be remapped on a failed write attempt. This can be problematic to test because cached writes will not remap the sector, only direct I/O writes to the disk.
198	C6	Uncorrectable Sector Count		The total number of uncorrectable errors when reading/writing a sector. A rise in the value of this attribute indicates defects of the disk surface and/or problems in the mechanical subsystem. (or Off-Line Scan Uncorrectable Sector Count – Fujitsu)[15]
199	C7	UltraDMA CRC Error Count		The number of errors in data transfer via the interface cable as determined by ICRC (Interface Cyclic Redundancy Check).
200	C8	Write Error Rate / Multi-Zone Error Rate		The total number of errors when writing a sector.
201	C9	Soft Read Error Rate		Number of off-track errors.

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202	CA	Data Address Mark errors		Number of Data Address Mark errors (or vendor-specific).[citation needed]
203	CB	Run Out Cancel		Number of ECC errors
204	CC	Soft ECC Correction		Number of errors corrected by software ECC[citation needed]
205	CD	Thermal Asperity Rate (TAR)		Number of errors due to high temperaure.[18]
206	CE	Flying Height		Height of heads above the disk surface. A flying height that's too low increases the chances of a head crash while a flying height that's too high increases the chances of a read/write error.[citation needed]
207	CF	Spin High Current		Amount of surge current used to spin up the drive.[18]
208	D0	Spin Buzz		Number of buzz routines needed to spin up the drive due to insufficient power.[18]
209	D1	Offline Seek Performance		Drive’s seek performance during its internal tests.[18]
211	D3	Vibration During Write		Vibration During Write[citation needed]
212	D4	Shock During Write		Shock During Write[citation needed]
220	DC	Disk Shift		Distance the disk has shifted relative to the spindle (usually due to shock or temperature). Unit of measure is unknown.
221	DD	G-Sense Error Rate		The number of errors resulting from externally-induced shock & vibration.
222	DE	Loaded Hours		Time spent operating under data load (movement of magnetic head armature)[citation needed]
223	DF	Load/Unload Retry Count		Number of times head changes position.[citation needed]
224	E0	Load Friction		Resistance caused by friction in mechanical parts while operating.[citation needed]
225	E1	Load/Unload Cycle Count		Total number of load cycles[citation needed]
226	E2	Load 'In'-time		Total time of loading on the magnetic heads actuator (time not spent in parking area).[citation needed]
227	E3	Torque Amplification Count		Number of attempts to compensate for platter speed variations[citation needed]
228	E4	Power-Off Retract Cycle		The number of times the magnetic armature was retracted automatically as a result of cutting power.[citation needed]
230	E6	GMR Head Amplitude		Amplitude of "thrashing" (distance of repetitive forward/reverse head motion)[citation needed]
231	E7	Temperature		Drive Temperature
240	F0	Head Flying Hours		Time while head is positioning[citation needed]
250	FA	Read Error Retry Rate		Number of errors while reading from a disk
254	FE	Free Fall Protection		Number of "Free Fall Events" detected [19]