The error still exists in versoin 9.62.
I downloaded and compiled versions 9.52 - 9.57 and tested the two commands hdparm -I /dev/sda hdparm --Istdout /dev/sda | hdparm --Istdin With version 9.56 both commands give the same output (hdparm -I with an additional line /dev/sda:). With versions 9.52 - 9.55 the "-I" calls give the same output als the 9.56 versions. The "--Istout ... | --Istdin" versions give inplausible information: ATA device, with non-removable media powers-up in standby; SET FEATURES subcmd spins-up. Model Number: .2"5S...
hdparm -I /dev/sda crashes device