Disk buffer (original) (raw)
Ein Festplattencache bezeichnet den schnellen Zwischenspeicher einer Festplatte, der Schreib- und Lesezugriffe auf einen Datenträger puffert, um den Einfluss der Latenzzeit und Datenübertragungsrate des Datenträgerzugriffs auf das System zu verringern.
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| dbo:abstract | يشير مصطلح الذاكرة المؤقتة للقرص الصلب أو المخزن المؤقت للقرص الصلب (disk cache) في سياق تخزين بينات الحاسوب إلى جزء محدد من ذاكرة محرك الأقراص الصلب (HDD) يعمل كمخزن مؤقت للبيانات بين اسطوانة القرص الصلب وأجزاء الحاسوب الأخرى. وتترواح مساحة هذه الذاكرة المؤقتة في محركات الأقراص الصلبة بين 8 إلى 256 ميجابايت، بينما تصل إلى 4 جيجابايت في وسائط التخزين ذات الحالة الثابتة. اعتبارا من أواخر 1980sكان تقريبا جميع الأقراص الصلبة تحتوي على متحكم صغير مدمج، وواجهة مقبس تكنولوجي متقدم أو ساتا أو سكزي أو قناة ألياف، وعادةً ما تحتوي دائرة محرك الأقراص على ذاكرة صغيرة تستخدم لتخزين البيانات التي تصل إلى ألواح القرص وتصدر منها. (ar) Ein Festplattencache bezeichnet den schnellen Zwischenspeicher einer Festplatte, der Schreib- und Lesezugriffe auf einen Datenträger puffert, um den Einfluss der Latenzzeit und Datenübertragungsrate des Datenträgerzugriffs auf das System zu verringern. (de) In computer storage, disk buffer (often ambiguously called disk cache or cache buffer) is the embedded memory in a hard disk drive (HDD) or solid state drive (SSD) acting as a buffer between the rest of the computer and the physical hard disk platter or flash memory that is used for storage. Modern hard disk drives come with 8 to 256 MiB of such memory, and solid-state drives come with up to 4 GB of cache memory. Since the late 1980s, nearly all disks sold have embedded microcontrollers and either an ATA, Serial ATA, SCSI, or Fibre Channel interface. The drive circuitry usually has a small amount of memory, used to store the data going to and coming from the disk platters. The disk buffer is physically distinct from and is used differently from the page cache typically kept by the operating system in the computer's main memory. The disk buffer is controlled by the microcontroller in the hard disk drive, and the page cache is controlled by the computer to which that disk is attached. The disk buffer is usually quite small, ranging between 8 MB to 4 GB, and the page cache is generally all unused main memory. While data in the page cache is reused multiple times, the data in the disk buffer is rarely reused. In this sense, the terms disk cache and cache buffer are misnomers; the embedded controller's memory is more appropriately called disk buffer. Note that disk array controllers, as opposed to disk controllers, usually have normal cache memory of around 0.5–8 GiB. (en) Em armazenamento de computadores, buffer de disco (geralmente chamado de cache de disco ou buffer de cache) é a memória incorporada em uma unidade de disco rígido (HDD) que atua como um buffer entre o restante do computador e o usado para armazenamento. As modernas unidades de disco rígido vêm com 8 a 256 MiB de memória, e as unidades de estado sólido vêm com até 4 GB de memória cache. Desde o final dos anos 80, quase todos os discos vendidos incorporavam microcontroladores e uma interface ATA, Serial ATA, SCSI ou Fibre Channel. O circuito da unidade geralmente possui uma pequena quantidade de memória, usada para armazenar os dados que vão e vêm do/para os pratos do disco. O buffer de disco é fisicamente distinto e é usado de maneira diferente do normalmente mantido pelo sistema operacional na memória principal do computador. O buffer do disco é controlado pelo microcontrolador na unidade de disco rígido e o cache de página é controlado pelo computador ao qual esse disco está conectado. O buffer de disco geralmente é bem pequeno, variando entre 8 e 256 MiB, e o cache de páginas é geralmente toda a memória principal não utilizada. Embora os dados no cache de página sejam reutilizados várias vezes, os dados no buffer do disco raramente são reutilizados. Nesse sentido, os termos cache de disco e buffer de cache são equívocos. A memória do controlador embarcado é mais adequadamente chamada de buffer de disco. Observe que os , em oposição aos controladores de disco, geralmente têm memória cache normal de cerca de 0,5 a 8 GiB. (pt) 磁盘缓存（英語：Disk Buffer、Disk Cache）实际上是将下载到的数据先保存于系统为软件分配的内存空间中（这个内存空间被称之为“内存池”），当保存到内存池中的数据达到一个程度时，便會将数据保存到硬盘中。这样可以减少实际的磁盘操作，有效的保护磁盘免于重复的读写操作而导致的损坏。 磁盘缓存是為了減少CPU透過I/O讀取磁碟機的次數，提昇磁碟I/O的效率，用一塊記憶體來儲存存取較頻繁的磁碟內容；因為記憶體的存取是電子動作，而磁碟的存取是機械動作，感覺上磁碟I/O變得較為快速。 相同的技巧可用在寫入動作，我們先將欲寫入的內容放入記憶體中，等到系統有其它空閒的時間，再將這塊記憶體的資料寫入磁碟中。 (zh) |
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| rdfs:comment | Ein Festplattencache bezeichnet den schnellen Zwischenspeicher einer Festplatte, der Schreib- und Lesezugriffe auf einen Datenträger puffert, um den Einfluss der Latenzzeit und Datenübertragungsrate des Datenträgerzugriffs auf das System zu verringern. (de) 磁盘缓存（英語：Disk Buffer、Disk Cache）实际上是将下载到的数据先保存于系统为软件分配的内存空间中（这个内存空间被称之为“内存池”），当保存到内存池中的数据达到一个程度时，便會将数据保存到硬盘中。这样可以减少实际的磁盘操作，有效的保护磁盘免于重复的读写操作而导致的损坏。 磁盘缓存是為了減少CPU透過I/O讀取磁碟機的次數，提昇磁碟I/O的效率，用一塊記憶體來儲存存取較頻繁的磁碟內容；因為記憶體的存取是電子動作，而磁碟的存取是機械動作，感覺上磁碟I/O變得較為快速。 相同的技巧可用在寫入動作，我們先將欲寫入的內容放入記憶體中，等到系統有其它空閒的時間，再將這塊記憶體的資料寫入磁碟中。 (zh) يشير مصطلح الذاكرة المؤقتة للقرص الصلب أو المخزن المؤقت للقرص الصلب (disk cache) في سياق تخزين بينات الحاسوب إلى جزء محدد من ذاكرة محرك الأقراص الصلب (HDD) يعمل كمخزن مؤقت للبيانات بين اسطوانة القرص الصلب وأجزاء الحاسوب الأخرى. وتترواح مساحة هذه الذاكرة المؤقتة في محركات الأقراص الصلبة بين 8 إلى 256 ميجابايت، بينما تصل إلى 4 جيجابايت في وسائط التخزين ذات الحالة الثابتة. (ar) In computer storage, disk buffer (often ambiguously called disk cache or cache buffer) is the embedded memory in a hard disk drive (HDD) or solid state drive (SSD) acting as a buffer between the rest of the computer and the physical hard disk platter or flash memory that is used for storage. Modern hard disk drives come with 8 to 256 MiB of such memory, and solid-state drives come with up to 4 GB of cache memory. Note that disk array controllers, as opposed to disk controllers, usually have normal cache memory of around 0.5–8 GiB. (en) Em armazenamento de computadores, buffer de disco (geralmente chamado de cache de disco ou buffer de cache) é a memória incorporada em uma unidade de disco rígido (HDD) que atua como um buffer entre o restante do computador e o usado para armazenamento. As modernas unidades de disco rígido vêm com 8 a 256 MiB de memória, e as unidades de estado sólido vêm com até 4 GB de memória cache. Observe que os , em oposição aos controladores de disco, geralmente têm memória cache normal de cerca de 0,5 a 8 GiB. (pt) |
| rdfs:label | ذاكرة مؤقتة للقرص الصلب (ar) Festplattencache (de) Disk buffer (en) Buffer de disco (pt) 磁盘缓存 (zh) |
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