[Bug 548513] Re: Some firewire & usb disks not working under 10.04

[Peter Petrakis]

@Colin

That's a good compromise, it documents the issue, and it works well. I thought
 I had found a glimmer of hope in the hdparm manpage.

       --prefer-ata12
              When  using the SAT (SCSI ATA Translation) protocol, hdparm nor‐
              mally prefers to use the 16-byte command format whenever  possi‐
              ble.   But  some  USB drive enclosures don't work correctly with
              16-byte commands.  This flag can be used to  force  use  of  the
              smaller  12-byte  command  format with such drives.  hdparm will
              still revert to 16-byte commands for things that cannot be  done
              with the 12-byte format (eg. sector accesses beyond 28-bits).

But it doesn't live up to it's claims, what we need is "force-ata12" not
"prefer".

The next version of hdparm has yet to be officially released. We should
also consider adding a kernel quirk for this drive wrt 16 byte ID cmds.

-- 
Some firewire & usb disks not working under 10.04
https://bugs.launchpad.net/bugs/548513
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