disco ssd Storing Notes HDD, SSD

disco ssd Storing Notes HDD, SSD

disco duro solidoSSD OEMdisco ssd HDD <

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(i) Track – is a toroidal area

(ii) sector – an arc segment on a trackdisco ssd, is the smallest physical storage unit of the disk

(iii) Cylindrical

in the

next string of platters disco ssd, a cylindrical ring wall composed of tracks of the same radius, is called a cylindrical

(4) Seek time

The shorter the seek time required for the head to move from the beginning (moving in radius) to the track where the data is located, the faster the I/O operation,

disk access time includes seek time, time to locate sectors, and time to read and write data

Disk access time includes seek time, rotation delay time, and data transfer time

Mainly the first two times are expensive.

which makes sequential readings much faster than random readings.

disk scheduling algorithms are (FIFO, SSTF, SCAN, CSCAN, FSCAN)

SSD SSDs

SSD SSD storage media are divided into two types: flash memory (FLASH), DRAM

SSD has no process of seeking and locating sectors, mainly using the characteristics of flash memory to locate directly, and the performance of random reading and sequential reading is relatively close, unlike the difference between HDDs.

ssd Fundamentals see my Youdao Cloud notes with the illustration disco duro solidoSSD OEMdisco ssd