HDDScan 3.1... it only reports SMART for the SATA connected disks on my system... running Windows 7 64bit full patched/current. I have a SANS Digital USB based 4-bay/SATA disk external enclosure, HDDScan shows the disk descriptors same as device manager does, but the SMART button is disabled for the 4 disks. The chipset for the SANS Digital 4-bay enclosure is... Century EX35SW4 based, many vendors use this chipset for the single, dual and quad-bay USB based enclosures, I have 3 different 4 bay enclosures from 3 different vendors and they all use the same chipset, so you may want to consider supporting it? Per my understanding the SMART information is there to be accessed. The drives are Hitatchi 500GB SATA drives in the 4 bay enclosure.

Bump?

HDDScan doesn't support this chipset

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SAN, NAS, RAID, Server, and HDD Data Recovery.

Try smartmontools.

At first glance, your chipset doesn't appear in the list of supported devices:
http://sourceforge.net/apps/trac/smartm ... SB-Devices

However, you could try some of the generic command line switches.

Otherwise you could ask the developers to investigate the possibility of adding support for it:
http://sourceforge.net/mailarchive/foru ... ls-support

Here are Windows versions of smartmontools:
http://smartmontools-win32.dyndns.org/smartmontools/

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A backup a day keeps DR away.

If the environment allows to do so, you can also power down the unit, remove one drive at the time from the unit (saying this so the drive order is not compromised) and check each drive individually for SMART reporting. This is likely more accurate anyway.

I would do this outside of Windows using MHDD utility for example.

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Hard Disk Drive, SSD, USB Drive and RAID Data Recovery Specialist in Massachusetts