ã¡ãã£ã¢èšäº
SSDã®èä¹
寿åœã䌞ã°ãããã®æè¡ããŠã§ã¢ã¬ããªã³ã°ãã«æå¹æ§ã¯ãªããšããç 究çµæ
ããºãææ°ããŒã¯ 78
twitterã³ã¡ã³ã 66ä»¶äž 1ïœ66件
ãŸãããã22幎å瀟äŒäººã«ãªã£ããšãäžçªæåã«æžããç¹èš±ããŠã§ã¢ã¬ããªã³ã°é¢ä¿ã§ããw åœæã®ãã©ãã·ã¥ã«å¯ŸããŠã¯æå³ãªãã¯ãªãã£ããã£ãŠããããªããšå€§å€ãªããšã«ãªã£ãã
ãŸãããæ°ã«ãªã
SSDã§ããŠã§ã¢ã¬ããªã³ã°ã®æ©æµãææ°ãªåœ¢ã§ç€ºãããããšããªãã®ã§ãã£ã±ãããããªãïŒãšãããæ©èœããŠããã®ããããããªãïŒãšãããšããããã¯ãOPTANEããDRAMãã£ãã·ã¥ã ããªã
ãã¡ããã
å·¥ãšïœŽã§ïœªïŒÂŽÐŽïœ;ïŒïœªã§ïœŽãšå·¥å·¥
ã«ããã«ã¯ä¿¡ãããã䞻匵ã ãªãTLCãªã©ã®å€å€åãããSSDãå
åãªå®çšæ§ãæã€ã«è³ã£ãã«ã¯ãŠã§ã¢ã¬ããªã³ã°ã®ãããã ããã
ã¿ãŠãã
ã»ãŒã
ãããããã䞻匵ã ãªããŠã§ã¢ã¬ããªã³ã°ã¯ç¹å®ã®ãããã¯(äŸãã°ããã¡ã€ã«ã·ã¹ãã ã®ç®¡ççšãããã¯) ãžã®æžèŸŒã¿ã®éäžãåé¿ãããã®ã ãšæã£ãŠãããã ãããã®ç 究ã¯å
šäœãžã®æžèŸŒã¿ãç¹°ãè¿ããŠãããšããã
ãã®å©çšåœ¢æ ã¯ããšããšããŠã§ã¢ã¬ããªã³ã°ã®ã¿ãŒã²ããå€ã ã
ãã®å©çšåœ¢æ ã¯ããšããšããŠã§ã¢ã¬ããªã³ã°ã®ã¿ãŒã²ããå€ã ã
ããŒãããð
ãã®ç 究ã«ã¯ãŠã§ã¢ã¬ããªã³ã°ã«ã€ããŠäœã®æå³ãå«ãŸããŠãªãããã®ç 究è
ã¯ãçµ±èšå€éå¹æãã«ã€ããŠçŸäžåå匷ãçŽããæ¹ãããïŒç¬ïŒ
ã!?è¡æã®éšåã§NANDãã©ãã·ã¥ã䜿ã話ããã£ããã©ã寿åœå»¶ã°ãããã®ãŠã§ã¢ã¬ããªã³ã°çã³ã³ãããŒã©ãŒã®å®è£
倧å€ã ããäžæ¡çšãšããŸãããããã
Wear Leveling ã¯å±ææžèŸŒãå€ãæã« Write Amplification ãç ç²ã«ããŠæ¶å»åæ°ãå¹³æºåããæè¡ãè©äŸ¡é¢æ°ã¯æ倧æ¶å»åæ°ã§å¹³åã§ã¯ãªããè² è·ãåäžæžèŸŒã ãçå€ãããã
ãã¡ã€ã«ã·ã¹ãã ã®iããŒãé åãšããã£ã¬ã¯ããªãšã³ããªã«å²ãåœãŠãããé åã«ã¯å¹ããŠãããã ãããã©ãããŒã¿ã«ãšããŠã¯ããŸãæå³ããªãã®ãã
ãªããšããããããªãã»ãããããšãã話
ããã¯ã¡ãã£ãšâŠä»æŽã ãªãããããªãç 究ãã
ãããŠã§ã¢ã¬ããªã³ã°ãã¯ãã ã®ãããŸããªããã ã£ãïŒç¬ïŒã ãé©ãã»ã©å¹æããªãéå¹ççã§ããããçµè«ãæ¢ããŸãããã
ãŠã§ã¢ã¬ããªã³ã°ã¯å
šãŠã®ãããã¯ã«ããŒã¿ãåæ£ããŠæžã蟌ãããšã§ãç¹å®ã®ãããã¯ãå£åããæã®ããŒã¿æ¶å€±ãæ
éãé²ããšåæã«ãSSDèªäœã®è£œå寿åœã延ã°ããšãããæè¡ã
ãžãŒãé¢çœããªããŸããã³ã³ã·ã¥ãŒããŒãšãšã³ã¿ãŒãã©ã€ãºã§ã¯éã£ãŠããããªæ°ããããã©ãçŽ åèªäœã®é²æ©ãèµ·å ããŠããã ãããª
å®ãSSDãæå€ãšé·æã¡ããã£ãŠããããŒã¿ã¯å®ã¯ãåœå
æå¿ã®æ¹ãã²ãããããŒã¿ãæžã蟌ã¿ç¶ããã¹ã¯ãªããã§èä¹
ãã¹ãããããŒã¿ããã£ãŠã
PCããŒãããã¢ãç§ã¿ãããªãªã¿ã¯ã¯ã ãããæ¢ç¥ã®æ å ±ã§ç¥ã£ãŠã
ã ãããå®ããããè²·ã
é«ããã€ã»ã©ã¿ã€ããŒå èãªããã
PCããŒãããã¢ãç§ã¿ãããªãªã¿ã¯ã¯ã ãããæ¢ç¥ã®æ å ±ã§ç¥ã£ãŠã
ã ãããå®ããããè²·ã
é«ããã€ã»ã©ã¿ã€ããŒå èãªããã
ã¯ãïŒãä»äºããïŒ
ãã®å®éšæå³ãªããïŒïœ
ãŠã§ã¢ã¬ããªã³ã°ã®å¹æã確èªããã®ã«ãã«ãã©ã€ãæžã蟌ã¿ã§å®éšããã®ïŒã£ãŠæããªãã ãïœ
ãŠã§ã¢ã¬ããªã³ã°ã®å¹æã確èªããã®ã«ãã«ãã©ã€ãæžã蟌ã¿ã§å®éšããã®ïŒã£ãŠæããªãã ãïœ
ã¡ãããšèªããŠãªããã©ãã¯ãŠïŒïŒïŒ
â
â
ð»IDEMAãHPãã
åé¡ïŒSSD
SSDã®èä¹ å¯¿åœã䌞ã°ãããã®æè¡
ããŠã§ã¢ã¬ããªã³ã°ãã«æå¹æ§ã¯ãªããšããç 究çµæ
åé¡ïŒSSD
SSDã®èä¹ å¯¿åœã䌞ã°ãããã®æè¡
ããŠã§ã¢ã¬ããªã³ã°ãã«æå¹æ§ã¯ãªããšããç 究çµæ
"容éå¯å€SSDã®å ŽåããŠã§ã¢ã¬ããªã³ã°ã䜿ããšæžã蟌ã¿å¹çãæ倧6.9ã«éããã®ã«å¯ŸããŠããŠã§ã¢ã¬ããªã³ã°ãªãã®å Žåã¯æžã蟌ã¿å¹çã2.89ã«ãããŸã£ã"
ããããïŒ
GIGAZINE :
ãªãã ãšã
å°æå
ã§ã¯ããããšããããšãã
SSDã®ãŠã§ã¢ã¬ããªã³ã°ã«ã¯å¹æããªããã ã£ãŠãæ¬åœããªïŒ
ããã€ã¹ã§ã¯ãªããã¹ãã§è¡ãã°è¯ããšããçµè«ã«æã¡èŸŒã¿ããã®ããªã
çŸå®ã®äžçã§å®å
šã·ãŒã±ã³ã·ã£ã«æžã蟌ã¿ãšãå®å
šã©ã³ãã æžã蟌ã¿ãšãçºçããªããšæããã ãã©ãå®éã®ç°å¢ã§ãããã¡ãªãã»ãŒäžåæžã蟌ã¿ïŒå»¶ã
ãšæžãæãããç¶ãããã°ãã¡ã€ã«ãçãªãã¹ãããçµæã ãããã
ããžãïŒ
ã¡ãŒã«ãŒããã£ã¡ãæšããŠã¢ããŒã«ããŠãæ©èœãªã®ã«âŠ
ãŸãå®éSSDãæ éããåã«PCã®ãªãã¬ã€ã¹ããã人ã®æ¹ãå€ãã ããã
HDDããããªãé·å¯¿ã ãæ°ã«ããå¿ èŠãªããª
ãã«æå¹æ§ã¯ãªããšããç 究çµæ
ã¡ãŒã«ãŒããã£ã¡ãæšããŠã¢ããŒã«ããŠãæ©èœãªã®ã«âŠ
ãŸãå®éSSDãæ éããåã«PCã®ãªãã¬ã€ã¹ããã人ã®æ¹ãå€ãã ããã
HDDããããªãé·å¯¿ã ãæ°ã«ããå¿ èŠãªããª
ãã«æå¹æ§ã¯ãªããšããç 究çµæ
ããžãw
ãããHDãšã®èä¹ æ§ã®å·®ãçž®ããã£ãŠäºã ã£ãã¯ããã
ãããHDãšã®èä¹ æ§ã®å·®ãçž®ããã£ãŠäºã ã£ãã¯ããã
ãŠã§ã¢ã¬ããªã³ã°ã®è©äŸ¡ãããªãæ³å®å¯¿åœèšå®ããŠå£ãããŸã§åããªããšæå³ãªãã ããã
äŸãšããŠã10å䜿ããšå£ããããã¡ãã10åçšæããŠ8人åæã«éã¹ããµãŒãã¹ãå§ãããšããã
äœã«ãèããã«æ¯åå庫ã®æåããåŒã£åŒµãåºããŠäœ¿ã£ããšãããš(ç¶ã
äŸãšããŠã10å䜿ããšå£ããããã¡ãã10åçšæããŠ8人åæã«éã¹ããµãŒãã¹ãå§ãããšããã
äœã«ãèããã«æ¯åå庫ã®æåããåŒã£åŒµãåºããŠäœ¿ã£ããšãããš(ç¶ã
é ãšå°»ã ãèªãã ãæµ®ãã ã®ã¯ãEvidence Base ââããç§åŠã¯å幎äºå幎ãšèšŒæ ãç©ã¿ã人ã
ã®æžæãå
¬å¹³ã«æºãããä¿¡é ŒãåŸãð
ããã¯âŠWin7æ代ã«ãã£ãé床ã¢ãããã³ã°ã«ã圷圿ãšããããããªâŠ
ãïŒããã¯ã·ã§ãã¯ã ãã
ããžã£ããã
ãããïŒ
ãŠã§ã¢ã¬ããªã³ã°ã«å€±æããŠãã®ïŒïŒ
ãŠã§ã¢ã¬ããªã³ã°ã«å€±æããŠãã®ïŒïŒ
ããžãŒ
ããæè¿ã§äžçªã®è¡æãåããâŠ
å®å¿ã¬ã³ã¿ã«WiFiãªãã¯ã©ãŠãWiFiæ±äº¬äžæïŒ
å²åŒã¯ãŒãã³ã³ãŒãã¯â(cloudsmartch2)
å²åŒã¯ãŒãã³ã³ãŒãã¯â(cloudsmartch2)
ãªããããããªãïŒ ã»ãªããââ
é
ã£ãŠããã®ã§ã¡ãããšã¯èããããªãããã°ã©ããèŠããšãåã«PWLã ããã¯ãœã£ãŠæ°ããããä»ã¯wear levelingãªãã®1.2å以äžã§ã¯ãªããã
Wear levelingããããšã§ç¹å®ã®é åãå£ããŠå šäœã䜿ããªããªãã®ãæãããããªããæå³ã¯ãããšæããã§ããä»ã¯éãã®ããã
Wear levelingããããšã§ç¹å®ã®é åãå£ããŠå šäœã䜿ããªããªãã®ãæãããããªããæå³ã¯ãããšæããã§ããä»ã¯éãã®ããã
ããšã§è©³ããèŠãŠã¿ã
ãŸããããæ»ãã ãšããã次ã
䜿çšäžèœã«ããŠãããŠã ãã ã容éãæžã£ãŠããã»ããç°¡åã§ã¯ãããã ãããã©ããŠãŒã¶ãŒããããèš±ããã£ãŠèšãåé¡ããªãâŠâŠ
ã¡ãŒã«ãŒå瀟ãç 究ããŠããŠãããªè©±ã¯ããåŸãã®ããªïŒ
ããâŠâŠ(å°æ)
ãã¡ãâïž
ãããããŠã§ã¢ã¬ããªã³ã°ã£ãŠWALãæžããæè¡ãããªããšæããã ãã©ð€
ãããæžèŸŒãå¹³æ»åããããã«ç§»åããããã ããWALå¢ããã®ã¯åœããåã§ã¯ð€
ãããæžèŸŒãå¹³æ»åããããã«ç§»åããããã ããWALå¢ããã®ã¯åœããåã§ã¯ð€
ãªããŠãã£ãã
ããžããww
ããã¯ããªããªã誀解ãçã¿ãããèšäºã§ãããåºæ¥ãéããæ£ç¢ºã«è§£èª¬ããŸãã
ãŸããŠã§ã¢ã¬ããªã³ã°ïŒä»¥äžWearïŒã¯ãæ£ç¢ºã«ã¯ãèšæ¶çŽ åã«ãšã£ãŠã®å»¶åœå¹æã¯ç¡ããWearãè¡ãã°ãæžãæãåæ°ã¯æ¶è²»ãããèš³ãªã®ã§åœç¶ã§ãã
äžæ¹ã§ãSSDãšããŠã®å»¶åœå¹æã¯ããïŒç¶ãïŒ
ãŸããŠã§ã¢ã¬ããªã³ã°ïŒä»¥äžWearïŒã¯ãæ£ç¢ºã«ã¯ãèšæ¶çŽ åã«ãšã£ãŠã®å»¶åœå¹æã¯ç¡ããWearãè¡ãã°ãæžãæãåæ°ã¯æ¶è²»ãããèš³ãªã®ã§åœç¶ã§ãã
äžæ¹ã§ãSSDãšããŠã®å»¶åœå¹æã¯ããïŒç¶ãïŒ
ε=â( 'Ï' )⯠寿åœã«æªåœ±é¿ã£ãŠããšïŒ
GIGAZINE :
ãŸã ãŸã éæž¡æãªãã ãªãŒ
ïŒãŠã§ã¢ã¬ããªã³ã°ã¯ãé©ãã»ã©å¹æããªãéå¹ççã§ããã
ïŒãŠã§ã¢ã¬ããªã³ã°ã«ãã£ãŠãã©ãã·ã¥ã¡ã¢ãªã®èä¹ æ§éçãäœäžããŠããããšããè¿ãå°æ¥ã«å®äŸãšããŠå ±åããããšäºæ³
ããã¯é©ãâŠæ¬åœã ãããïŒ
ãããªäºã¯èšèšæãå¿ ãã·ãã¥ã¬ãŒã·ã§ã³ããŠããã¯ãã§ããâŠ
ïŒãŠã§ã¢ã¬ããªã³ã°ã«ãã£ãŠãã©ãã·ã¥ã¡ã¢ãªã®èä¹ æ§éçãäœäžããŠããããšããè¿ãå°æ¥ã«å®äŸãšããŠå ±åããããšäºæ³
ããã¯é©ãâŠæ¬åœã ãããïŒ
ãããªäºã¯èšèšæãå¿ ãã·ãã¥ã¬ãŒã·ã§ã³ããŠããã¯ãã§ããâŠ
ãªãã ã£ãŠãŒ
âãŠã§ã¢ã¬ããªã³ã°ã¯ãããŸã§ããªãç 究ãããŠããããŒãã§ã¯ãããŸãããå®éã«ã¯æ£ããéçšããã®ã¯éåžžã«é£ãããçµæãšããŠãé©ãã»ã©å¹æããªãéå¹ççã§ããããšè©äŸ¡â
ãšã§âŠ
åŒçšïŒç 究ããŒã ã¯ããŠã§ã¢ã¬ããªã³ã°ã¯ãããŸã§ããªãç 究ãããŠããããŒãã§ã¯ãããŸãããå®éã«ã¯æ£ããéçšããã®ã¯éåžžã«é£ãããçµæãšããŠãé©ãã»ã©å¹æããªãéå¹ççã§ããããšè©äŸ¡ã
ãªãããçŽæã«åããçµæããªãŒã
Pocket New item archived:
ð
ð
ãåºæ / å³éžã
ð
ãåºæ / å³éžã
ãããããããã¥ãŒã¹ã