하드디스크(HDD) SMART 정보, 비교

S.M.A.R.T.(Self-Monitoring, Analysis and Reporting Technology, "자가 진단, 분석, 보고 기술", 간단히 SMART)

* 활용방안

- 하드디스크의 상태파악

- 디스크장애 사전감지, 데이터 백업 및 레이드볼륨 사전 백업

- 2007년 구글에서 작성한문서에 따르면 SMART 정보는 오류감지에 별 도움이 안된다고 한다. 하지만 최근 몇년간 백여개의 디스크를 교체한 경험으로 보아 서버 환경에서는 꽤 쓸만하다고 판단된다. SMART 에러가 발생되고나서 실제 읽기/쓰기에 문제가 발생된 장비가 여럿 있었기때문이다.

* smartinfo 내용

ID	16진	특성 이름
01	0x01	읽기 지연 오류(Read Error Rate)
02	0x02	Throughput Performance
03	0x03	Spin-Up Time
04	0x04	Start/Stop Count
05	0x05	Reallocated Sectors Count
06	0x06	Read Channel Margin
07	0x07	탐색 지연 오류(Seek Error Rate)
08	0x08	Seek Time Performance
09	0x09	Power-On Hours (POH)
10	0x0A	Spin Retry Count
11	0x0B	Recalibration Retries / Calibration Retry Count
12	0x0C	Power Cycle Count
13	0x0D	Soft Read Error Rate
180	0xB4	Unused Reserved Block Count Total
181	0xB5	Program Fail Count Total / Non-4K Aligned Access Count
183	0xB7	SATA Downshift Error Count / Runtime Bad Block
184	0xB8	End-to-End error / IOEDC
185	0xB9	Head Stability
186	0xBA	Induced Op-Vibration Detection
187	0xBB	Reported Uncorrectable Errors
188	0xBC	Command Timeout
189	0xBD	High Fly Writes
190	0xBE	Airflow Temperature (WDC) resp. Airflow Temperature Celsius (HP)
190	0xBE	Temperature Difference from 100
191	0xBF	G-sense Error Rate
192	0xC0	Power-off Retract Count / Emergency Retract Cycle Count (Fujitsu)[2]
193	0xC1	Load Cycle Count / Load/Unload Cycle Count (Fujitsu)
194	0xC2	Temperature resp. Temperature Celsius
195	0xC3	Hardware ECC Recovered
196	0xC4	Reallocation Event Count
197	0xC5	Current Pending Sector Count
198	0xC6	Uncorrectable Sector Count / Offline Uncorrectable / Off-Line Scan Uncorrectable Sector Count[2]
199	0xC7	UltraDMA CRC Error Count
200	0xC8	Multi-Zone Error Rate [3]
200	0xC8	Write Error Rate (Fujitsu)
201	0xC9	Soft Read Error Rate / TA Counter Detected
202	0xCA	Data Address Mark errors / TA Counter Increased
203	0xCB	Run Out Cancel
204	0xCC	Soft ECC Correction
205	0xCD	Thermal Asperity Rate (TAR)
206	0xCE	Flying Height
207	0xCF	Spin High Current
208	0xD0	Spin Buzz
209	0xD1	Offline Seek Performance
210	0xD2	Vibration During Write
211	0xD3	Vibration During Write
212	0xD4	Shock During Write
220	0xDC	Disk Shift
221	0xDD	G-Sense Error Rate
222	0xDE	Loaded Hours
223	0xDF	Load/Unload Retry Count
224	0xE0	Load Friction
225	0xE1	Load/Unload Cycle Count
226	0xE2	Load 'In'-time
227	0xE3	Torque Amplification Count
228	0xE4	Power-Off Retract Cycle
230	0xE6	GMR Head Amplitude
230	0xE6	Drive Life Protection Status
231	0xE7	Temperature
231	0xE7	SSD Life Left
232	0xE8	Endurance Remaining
232	0xE8	Available Reserved Space
233	0xE9	Power-On Hours
233	0xE9	Media Wearout Indicator
234	0xEA	Average erase count AND Maximum Erase Count
235	0xEB	Good Block Count AND System(Free) Block Count
240	0xF0	Head Flying Hours
240	0xF0	Transfer Error Rate (Fujitsu)
241	0xF1	Total LBAs Written
242	0xF2	Total LBAs Read
250	0xFA	Read Error Retry Rate
254	0xFE	Free Fall Protection

*Crystaldiskinfo  정보

http://crystalmark.info/software/CrystalDiskInfo/index-e.html

 - 노랗게 표시한 디스크 3개가 크리스털디스크마에서 '주의' 판정한것들이다. (그림을 클릭하면 큰그림이 보입니다)

 - 네번째의 정상인 하드디스크와 값을 비교하기위해 우측에 각 값들의 차를 계산하여 차이가 있는부분이 색칠한부분들이다.

원본첨부 :

smartinfo_cdm.pdf

*SMART 상세내용

http://en.wikipedia.org/wiki/S.M.A.R.T.

http://ko.wikipedia.org/wiki/S.M.A.R.T.

* SMART 정보 삭제

http://softadvice.informer.com/Hdd_Smart_Reset_Tool.html

* HDD 로우레벨포맷

http://hddguru.com/software/HDD-LLF-Low-Level-Format-Tool/

*google의 하드디스크 시험보고서

https://www.google.co.kr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCIQFjAA&url=http%3A%2F%2Fresearch.google.com%2Farchive%2Fdisk_failures.pdf&ei=FpBVVfzLO9S78gWI9IOAAQ&usg=AFQjCNGdAu5mMDlzXvPg0CSZPH6HavPX3g&bvm=bv.93564037,d.dGY