I've come across an app called scsitools. I don't know where to get an rpm. The deb package is available through the usual channels if you use debian. Have a look around
www.rpm.org for it. It does these things:
scsiinfo: displays SCSI drive low-level information and modifies SCSI
drive settings,
scsidev: makes permanent SCSI LUN -> devicename connections,
scsifmt: low-level SCSI formatter,
sraw: benchmarks raw SCSI I/O rates bypassing the buffer cache,
scsistop: low-level SCSI drive start/stop program,
scsi-spin: program to manually spin up and down a SCSI device.
There's a related package that I've found. It seems to split this up into parts and not all the above is included. The link for it is:
http://www.speakeasy.org/~xyzzy/scsi.html. I just typed in "hdparm scsi" into google and found it in minutes. Mind you it was a polish site that directed me to it but I'm sure there are mentions of it in english.
Btw, they seemed to mention the need for a kernel patch if you want your drive to automatically powerdown after a certain idle timeout. Not sure if this is still the case.