SAS Drives Showing 0B in lsblk and Missing from Multipath: The 520-Byte Sector Problem

Enterprise SAS SSDs repurposed from storage arrays often arrive formatted with 520-byte sectors — a T10 DIF/PI integrity field used by array controllers that Linux cannot handle. The kernel rejects the drive entirely, reporting 0B in lsblk and leaving multipathd with nothing to work with.