On Tue, Sep 10, 2019 at 11:12:36AM -0400, Bryan Gurney wrote: > Oh, okay. I'm pretty sure that blkid checks regions near the end of a > device (for example, GPT has what looks like a backup of the "EFI > PART" boot record near the end of the device). Therefore, it may be > worthwhile to double-check the size of the partition, in case they're > not 4 GB, for some strange reason. Some MD RAID suprblocks also are at the end. Either way I'm pretty sure this is legitimate probing and not a bug. > Why is there an "Illegal Request - Unaligned write command" sense > error from sd, right after the failed ata command "READ FPDMA QUEUED"? > Is this an expected failure mode for a read to a locked range? (I'm > not familiar with TCG Opal drives, so unfortunately I don't have > enough context.) It could be that we are just having issues translating the errors, especially given that we don't use sense data in ATA except for ZAC drives.