28-09-2005, 11:22
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חבר מתאריך: 09.07.03
הודעות: 7,557
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הסבר על ה NQC יתקבל בברכה (הרבה זמן לא עקבתי אחרי כל ענייני החומרה וכל זה...)
הסגייט שווה את ההפרש (עולה 520 אם אינני טועה)?
עריכה: חברנו הטוב גוגל עזר לי כרגע... הבנתי שהלוח שלי לא תומך ב NCQ למרות שעדיין לא קראתי מה זה... יש לי נפורס 2 (ABIT NF&-S2)
הנה מה שכתוב:
At this time, only Intel's and NVIDIA's newest motherboard chipsets support Native Command queuing, which limits the combinations of hardware that can be used. More specifically, boards like Intel's 910, 915, and 925 chipsets with ICH6 (I/O Controller Hub 6), and NVIDIA's newest nForce4 based motherboards, which have the Advanced Host Controller Interface (AHCI), are the only boards that will allow users to enable NCQ for drives with the feature.
אוקיי גם הבנתי מה זה NCQ והנה הסבר למי שיהיה צריך:
Now, take your applications running on your OS and throw an NCQ enabled drive in the mix. The function of NCQ is all in the name. Native Command Queuing takes the randomized list of requests in the drive's queue and organizes each request based on the location of the requested data on the disk. For example, we have a 30MB Photoshop CS image on our hard drive, which is broken up into five segments on platter 1. The file is spread out on 5 different tracks and to make things more complicated, they are not tracks 1 through 5, but rather 1, 3, 5, 6, and 8, and each piece of the file is not in order on those tracks. When the application requests the PSD file, it sends to the queue of the hard disk the segments that it requires in order from A through E. To get from file segment A to segment B, the read head must skip from track 1 to track 5 to retrieve the data in that order. The read head must then move back to track 3 to pick up segment C of our 30MB PSD file and so on, and this skipping back and forth between tracks takes more time than it should. A more efficient way to gather the requested data would be to read from track 1, then 3, then 5, 6, and 8 last no matter what file fragment is picked up. The file can then be put together in the drive's cache for delivery. This is what NCQ does. As a file is requested, the NCQ feature organizes the five segments of the 30MB PSD file by their locations on the hard disk drive. After the drive reads the data, it is sent off to the OS. Much more efficient, right?
תודה!
רמי.
נערך לאחרונה ע"י system_x בתאריך 28-09-2005 בשעה 11:34.
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