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For SD cardreaders it is extremely common not to have a cache. Consequently, the following messages do not point to a real error one could try to fix but rather describe how the disk works: sd 0:0:0:0: [sda] No Caching mode page found sd 0:0:0:0: [sda] Assuming drive cache: write through Print these messages as warnings instead of errors. Link: https://lore.kernel.org/r/20211013075050.3870354-1-martin.kepplinger@puri.sm Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>