On Thu, Mar 26, 2009 at 03:12:52PM -0500, Billy Crook wrote:
...
> Would a SATA drive behind vblade, or behind the LayerWalker 16800 chip
> be a good fit?  If so, I'd be glad to beta it.

I don't think that it's a good fit for the vblade.  The vblade is a
userspace process.  It interacts with a file, whether that's /tmp/foo
or /dev/hda.  Looking "under the hood" to see what's behind the file
abstraction would be a design flaw for vblade.  In the case of vblade
exporting a SATA disk, it would be cleaner to talk SMART to the disk
vblade is exporting and then make that information available as
needed through another mechanism.

The LayerWalker chip would always be talking directly to a real disk,
so it would make sense for it to give SMART commands to the disk.  I
don't know whether it would, but I can't think of a reason why it
wouldn't, since it's no extra effort for it to do so.  It doesn't have
to understand the ATA commands it passes to the disk.

-- 
  Ed Cashin <ecas...@coraid.com>
  Find experimental aoe Linux driver patches at
  http://coraid.typepad.com/aoe_linux_proving_grounds/

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