Hard drives (non-SSD) are generally wiped with the command
dd if=/dev/urandom of=/dev/sdX conv=fsync status=progress. Since power outages do occur, this lends to restarting the wipe process multiple times. Additionally, there are often requirements to move equipment.
dd as far as i know and based on my research does not support the ability to resume interruptions.
ddrescue are primarily focused on copying bitwise data from source to destination. Additionally they are concerned about resuming the copying process.
Based on a post to wipe unwritable sectors, it suggests that
ddrescue can be used to wipe disks.
ddrescue be resumed if wiping disks and if so how when using a live CDs or DVDs?
Alternatively, what other options are there if
ddrescue is unable to support this requirement?
ddrescue is not currently in use. If it does support the requirement to resume an interrupted process, it'll be used going forward.