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mogwaing id:mogwaing

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ä¼Šå‹¢é›…è‹±ã®ITè¦‹èžéŒ² SCSIãƒ¦ãƒ¼ã‚¶ã‚‚æ³¨ç›®!? ã® ã‚·ãƒªã‚¢ãƒ«ATA Native Command Queuing
ã‚·ãƒªã‚¢ãƒ«ATAã®åˆ©ç”¨ç¯„å›²æ‹¡å¤§ã‚’ç›®æŒ‡ã—ã¦ç–å®šä¸ã®æ¬¡ä¸–ä»£ä»•æ§˜ã€Œã‚·ãƒªã‚¢ãƒ«ATA IIã€ãŒç™ºè¡¨ã•ã‚Œã¦1å¹´ã‚’çµŒéŽã—ãŸãŒã€ä»Šå¹´9æœˆã«ã¯ã‚·ãƒªã‚¢ãƒ«ATA IIã®æ©Ÿèƒ½ã‚’å¼·åŒ–ã™ã‚‹æ‹¡å¼µä»•æ§˜ãŒã„ãã¤ã‹è¿½åŠ ã•ã‚Œã‚‹ãªã©ã€ã‹ãªã‚Šç©æ¥µçš„ãªæ§˜åãŒã†ã‹ãŒãˆã‚‹ã€‚ä»Šå›žã¯ã€ã‚·ãƒªã‚¢ãƒ«ATAè£½å“ã®é–‹ç™ºã«æºã‚ã‚‹ãƒ™ãƒ³ãƒ€ã‹ã‚‰ã®ã‚³ãƒ¡ãƒ³ãƒˆã‚’äº¤ãˆãªãŒã‚‰ã€ã‚·ãƒªã‚¢ãƒ«ATA IIã§æœ€ã‚‚æ³¨ç›®ã—ãŸã„æ–°æ©Ÿèƒ½ã€ŒNative Command Queuingã€ã®ä»•çµ„ã¿ã‚’è§£èª¬ã—ã¦ã„ãã€‚ â—å¤šãã®PCã§ãƒ‘ãƒ•ã‚©ãƒ¼ãƒžãƒ³ã‚¹å‘ä¸Šã‚’æœŸå¾…ã§ãã‚‹Native Command Queuing ã‚·ãƒªã‚¢ãƒ«ATA IIã¯ã€ã‚µãƒ¼ãƒã‚„ãƒ¯ãƒ¼ã‚¯ã‚¹ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸å‘ã‘ã®æ‹¡å¼µæ©Ÿèƒ½ã‚’æä¾›ã™ã‚‹ã‚·ãƒªã‚¢ãƒ«ATA 1.0ã®è£œåŠ©ä»•æ§˜ã§ã‚ã‚‹ã€‚ã‚·ãƒªã‚¢ãƒ«ATA IIã«è¿½åŠ ã•ã‚ŒãŸæ©Ÿèƒ½ã«ã¯ã€ãƒ‡ãƒ¼ã‚¿ã‚¢ã‚¯ã‚»ã‚¹ã®åŠ¹çŽ‡ã‚’é«˜ã‚ã‚‹Native Command Queuingã€ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã®çä½“å†…éƒ¨(æ¸©åº¦ã€å†·å´ãƒ•ã‚¡ãƒ³ã®å›ž
mogwaing 2009/11/07
sata

hdd

ncq

tcq
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Native Command Queuing - Wikipedia
NCQ allows the drive itself to determine the optimal order in which to retrieve outstanding requests. This may, as here, allow the drive to fulfill all requests in fewer rotations and thus less time. In computing, Native Command Queuing (NCQ) is an extension of the Serial ATA protocol allowing hard disk drives to internally optimize the order in which received read and write commands are executed.
mogwaing 2009/11/07
sata

ncq

hdd
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Tagged Command Queuing - Wikipedia
Tagged Command Queuing (TCQ) is a techno logy built into certain ATA and SCSI[1] hard drives. It allows the operating system to send multiple read and write requests to a hard drive. ATA TCQ is not identical in function to the more efficient Native Command Queuing (NCQ) used by SATA drives.[2] SCSI TCQ does not suffer from the same limitations as ATA TCQ. Without TCQ, an operating system was limite
mogwaing 2009/11/07
sas

sata

tcq

ncq

hdd
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PC
Windowsã®å¤§è¿·æƒ‘ã‚’æ–¬ã‚‹ å½¹ã«ç«‹ãŸãªã„ã“ã¨ãŒå¤šã„Edgeã®ã‚¯ãƒ¼ãƒãƒ³ã€ã„ã£ãæ¶ˆã—ã¦ã—ã¾ãŠã† 2024.03.13
mogwaing 2009/11/07
hdd

sata

ncq
ãƒªãƒ³ã‚¯
SATAII/SATA
ãƒ‘ã‚½ã‚³ãƒ³ã¨å‘¨è¾ºæ©Ÿå™¨ã®é–“ã§ãƒ‡ãƒ¼ã‚¿è»¢é€ã‚’ã™ã‚‹ãŸã‚ã®æŽ¥ç¶šè¦æ ¼ã§ã™ã€‚ ãƒ‘ã‚½ã‚³ãƒ³å†…éƒ¨ã«å†…è”µHDDã‚„å†…è”µãƒ–ãƒ«ãƒ¼ãƒ¬ã‚¤/DVDãƒ‰ãƒ©ã‚¤ãƒ–ãªã©ã‚’å–ã‚Šä»˜ã‘æŽ¥ç¶šã§ãã¾ã™ã€‚â€œSATAâ€ã¨ã¯æœ¬æ¥ã®SerialATAï¼ˆã‚·ãƒªã‚¢ãƒ«ATAï¼‰ã®ç•¥ç§°ãŒå®šç€ã—ãŸã‚‚ã®ã§ã™ã€‚ SATAIIã¨SATAã¯ã‚³ãƒã‚¯ã‚¿ãƒ¼å½¢çŠ¶ãŒåŒã˜ã§äº’æ›æ€§ãŒã‚ã‚Šã¾ã™ã€‚SATAIIã¨SATAã®ä¸»ãªé•ã„ã¯ãƒ‡ãƒ¼ã‚¿ã®è»¢é€é€Ÿåº¦ã€‚SATAIIã®æ–¹ãŒé«˜é€Ÿã§ã™ã€‚ã¾ãŸãƒ‰ãƒ©ã‚¤ãƒ–ã®å®ŸåŠ¹è»¢é€é€Ÿåº¦ã‚’å‘ä¸Šã•ã›ã‚‹æ©Ÿèƒ½ï¼ˆNCQã€AHCIç‰ï¼‰ã«ã‚‚å¯¾å¿œã—ã¦ã„ã¾ã™ã€‚
mogwaing 2009/11/03
hdd

sata

ide
ãƒªãƒ³ã‚¯
SSD vs. SATA RAID: A performance benchmark | Linux.com | The source for Linux information
By Ben MartinÂ¬ï¿½ï¿½ Without going into details, SSDs may use single-level cell (SLC) or multi-level cell storage, with SLC drives typically offering better performance. SSDs offer different read and write speeds, form factors, and capacity. I looked at several models from Mtron. The performance of the 3.5-inch and 2.5-inch form factors is identical, so you might as well get the 2.5-inch drive because
mogwaing 2009/02/08
ssd

hdd

sata

raid

performance
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è£¸æ—ã®ãŠç«‹ã¡å° USB2.0/eSATA ã‚³ãƒ³ãƒœæŽ¥ç¶šã‚¿ã‚¤ãƒ—ï¼ï¼ 2.5â€ï¼†3.5â€SATAãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ç”¨ã‚¯ãƒ¬ãƒ¼ãƒ‰ãƒ«ï¼ SATA HDDã‚’ä¸Šã‹ã‚‰å·®ã—è¾¼ã‚€æ–°æ„Ÿè¦šã®ã‚¯ãƒ¬ãƒ¼ãƒ‰ãƒ«ã‚¹ã‚¿ã‚¤ãƒ«ï¼ HDDå–ã‚Šå‡ºã—è£œåŠ©ãƒœã‚¿ãƒ³æè¼‰ã§ã€æŠœãå·®ã—ã‚‚æ¥½ã€…ã€‚
mogwaing 2008/04/07
hdd

sata
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