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I am using an external 1 TB WD hard drive with Advanced Format (4096 bytes sector size). What is the recommended value for the bs option in dd? Should I use dd bs=4096? And if I get this value "wrong" is there any data problem that could appear or is this option only in terms of speed?
Also I am securely wiping the hard drive, could I not fully wipe the drive if I am using the bs option?
Sector size (logical/physical): 512 bytes / 4096 bytes
"If it's too small (i.e. less than the logical sector size), then there could be issues" – Other than in terms of speed? Can you elaborate? What could they be? – Kamil Maciorowski – 2018-01-25T05:33:57.913
@KamilMaciorowski -- If you use the seek option or an oddball count with a less-than-sector-size bs (i.e. expect dd to perform a read before a write in order to perform partial sector operations), then dd will probably not do what you want. – sawdust – 2018-01-25T23:50:36.063
Do you have any code or link to support this? – Kamil Maciorowski – 2018-01-26T04:47:10.227