ZCAV - ορισμός. Τι είναι το ZCAV
Diclib.com
Λεξικό ChatGPT
Εισάγετε μια λέξη ή φράση σε οποιαδήποτε γλώσσα 👆
Γλώσσα:

Μετάφραση και ανάλυση λέξεων από την τεχνητή νοημοσύνη ChatGPT

Σε αυτήν τη σελίδα μπορείτε να λάβετε μια λεπτομερή ανάλυση μιας λέξης ή μιας φράσης, η οποία δημιουργήθηκε χρησιμοποιώντας το ChatGPT, την καλύτερη τεχνολογία τεχνητής νοημοσύνης μέχρι σήμερα:

  • πώς χρησιμοποιείται η λέξη
  • συχνότητα χρήσης
  • χρησιμοποιείται πιο συχνά στον προφορικό ή γραπτό λόγο
  • επιλογές μετάφρασης λέξεων
  • παραδείγματα χρήσης (πολλές φράσεις με μετάφραση)
  • ετυμολογία

Τι (ποιος) είναι ZCAV - ορισμός

Zoned Bit Recording; Zone Constant Angular Velocity; Zoned Constant Angular Velocity; Zone CAV; ZCAV; Z-CAV; Zoned CAV; Zoned constant angular velocity; Zone constant angular velocity; Zone Bit Recording; Zoned bit recording; Multiple Zone Recording; Multiple zone recording
  • Physical layout of sectors in a zone-bit disc: As distance from the centre increases, the number of sectors in a given angle increases from one (red) to two (green) to four (grey).

ZCAV         
Zone Constant Angular Velocity
Zone bit recording         
In computer storage, zone bit recording (ZBR) is a method used by disk drives to optimise the tracks for increased data capacity. It does this by placing more sectors per zone on outer tracks than on inner tracks.

Βικιπαίδεια

Zone bit recording

In computer storage, zone bit recording (ZBR) is a method used by disk drives to optimise the tracks for increased data capacity. It does this by placing more sectors per zone on outer tracks than on inner tracks. This contrasts with other approaches, such as constant angular velocity (CAV) -drives, where the number of sectors per track are the same. On a disk consisting of roughly concentric tracks – whether realized as separate circular tracks or as a single spiral track – the physical track length (circumference) is increased as it gets farther from the centre hub.

The inner tracks are packed as densely as the particular drive's technology allows. The packing of the rest of the disks is changed depending on the type of disk. Zone recording was pioneered and patented by Chuck Peddle in 1961 while working for General Electric.

With a CAV-drive the data on the outer tracks are the same angular width of those in the centre, and so less densely packed. Using ZBR instead, the inner zoning is used to set the read/write rate, which is the same for other tracks. This permits the drive to have more bits stored in the outside tracks compared to the inner ones. Storing more bits per track equates to achieving a higher total data capacity on the same disk area.

However, ZBR influences other performance characteristics of the hard disk. In the outer most tracks, data will have the highest data transfer rate. Since both hard disks and floppy disks typically number their tracks beginning at the outer edge and continuing inward, and since operating systems typically fill the lowest-numbered tracks first, this is where the operating system typically stores its own files during its initial installation onto an empty drive. Testing disk drives when they are new or empty after defragmenting them with some benchmarking applications will often show their highest performance. After some time, when more data are stored in the inner tracks, the average data transfer rate will drop, because the transfer rate in the inner zones is slower; this, combined with the head's longer stroke and possible fragmentation, may give the impression of the disk drive slowing down over time.

Some other ZBR drives, such as the 800 kilobyte 3.5" floppy drives in the Apple IIGS and older Macintosh computers, don't change the data rate but rather spin the medium slower when reading or writing outer tracks, thus approximating the performance of constant linear velocity drives.