Erase Time

Overwrite erase method(HDD, SSD, eMMC)

  • Erase times vary greatly depending on the number of writes, the hardware performance of the PC, and the connection type of HDD, SSD, or eMMC. Please consider this example as a guide only.
  • If a disk has many hardware failures (bad sectors, etc.), it may take more time than shown in this table or the estimated erasure time displayed before the erasure operation may be less accurate.
  • If multiple disks are connected to a single PC, multiple disks can be erased simultaneously.
  • When performing "erasure verification" to confirm that data has been successfully erased, time equivalent to one overwrite erasure is added.
Erase Time (Random numbers 1 time) <Example >
Disc type
Disk space
Connection type		 HDD
500GB/SATA		 HDD
2TB/SATA		 HDD
3TB/SATA		 SSD
256GB/NVMe
Erase Time 1hr. 15min.
9.0sec./1GB		 4hr. 12min.
7.6sec./1GB		 5hr. 57min.
7.1sec./1GB		 11min.
2.5sec./1GB

Secure Erasure Method(HDD, SSD, eMMC)/
Sanitized Erasure Method(HDD, SSD)

  • HDD Secure Erase/Sanitize Erase takes the same amount of time as the Overwrite Erase method.However, unlike overwrite erase, Enhanced Security Erase includes bad sectors.
  • SSD secure erase/sanitize erase uses the erase function of the SSD itself, so data erasure is completed in a shorter time (less than 1 minute) compared to the overwrite erase method, but the subsequent “erase verification” takes time equivalent to one overwrite erase.Unlike the overwrite-erase method, however, it writes meaningless data (random numbers, all zeros, etc.) to all blocks on the disk without using the wear leveling function of flash memory.
  • eMMC Secure Erase uses the erase function of the eMMC itself, so data erasure is completed in a shorter time (less than 1 minute) compared to the overwrite erase method, but the subsequent “erase verification” takes time equivalent to one time of overwrite erase.Unlike the overwrite-erase method, however, it writes meaningless data (random numbers, all zeros, etc.) to all blocks on the disk without using the wear-levelling function of flash memory.
  • If multiple disks are connected to a single PC, multiple disks can be erased simultaneously.