Experimente estes comandos:
lshw -class disk
hwinfo --disk
Você pode ter que instalar o hwinfo .
Concerning hdparm :
hdparm (8) diz:
Although this utility is intended primarily for use with SATA/IDE hard disk
devices, several of the options are also valid (and permitted) for use with
SCSI hard disk devices and MFM/RLL hard disks with XT interfaces.
e:
Some options (eg. -r for SCSI) may not work with old kernels as necessary
ioctl()´s were not supported.