問63
頻出度★★☆
SSDの全てのデータを消去し，復元できなくする方法として用いられているものはどれか。
令和6年度 ITパスポート試験 問63
テクノロジ系コンピュータ構成要素 › メモリ
This question's explanation and your answers so far.
解説
問 63
- ア
正解 The correct answer is ア. Secure Erase is a bulk-erase function provided as a standard command for ATA storage (such as Serial ATA); the device itself completely erases all storage areas inside an SSD or HDD drive in accordance with the standard. As a result, even data that would remain after an ordinary deletion or formatting is put into a state where it cannot be recovered. In particular, because an SSD spreads out physical locations through mechanisms such as wear leveling, ordinary overwrite erasure tends not to work well; Secure Erase, however, erases all cells inside the drive, so it is used as a method to make SSD data unrecoverable.
Incorrectイ
Magnetic erasure (degaussing) is a method that destroys magnetic recordings with a strong magnetic field, and is effective for media that record on magnetic material, such as HDDs and magnetic tape. However, an SSD is flash memory that holds data by electric charge without using magnetism, so magnetic erasure cannot erase it. It is unsuitable for SSDs.
Incorrectウ
Secure Boot is a UEFI mechanism that, when a PC starts up, allows only software with a legitimate signature to run, thereby preventing unauthorized programs (such as malware) from launching. It is a security feature at startup and has nothing to do with erasing data.
Incorrectエ
Data cleansing refers to the work of organizing duplicates, inconsistent notation, and errors within a database and the like to improve data quality. It is the cleaning up and correction of data, not a process that erases the data on a drive so that it cannot be recovered.
ここがポイント
- Secure Erase is a standard ATA bulk-erase command; the device itself completely erases all storage areas of an SSD/HDD, making them unrecoverable.
- Magnetic erasure (degaussing) is effective for magnetic media (HDDs, magnetic tape) but does not work on SSDs, which are flash memory that does not use magnetism.
用語