On Wed, Jun 17, 2009 at 03:37:41PM -0400, David Magda wrote:
> On Wed, June 17, 2009 14:52, Tom Birkenbach wrote:
> > Any thoughts on how to reconfigure an existing drive OR bring in the drive
> > as desired?

You could enter the devices manually, but in this case it will have no
effect.  

> You can see that for some technologies only certain things are possible.
> It may be that for LTO-3 there is no "ultra" compression mode--or rather
> it's probably that "ultra density" mode is simply the normal compression
> system that LTO-3 provides; the 'u' and 'c' may be synonyms in a sense,
> and Sun simply decided to only make the 'c' option visible.

It's not solaris in this case.  The 'u' device is just as visible as
'c', but Networker's not choosing to use it.

However, those two devices will always be the same, regardless of drive
type.  Solaris only has four density specifications.  You might think of
them as (l)ow, (m)edium, (h)igh, and (u)ltra.  For a given drive they
might be the same or different.  But the extra moniker (c), is just
another name for (u).

You can see this if you notice the devices are just symlinks, and (u)
and (c) point at the same device.  For instance:

# ls -lL /dev/rmt/0?bn
crw-------   1 root     sys       33,990 Feb 11  2006 /dev/rmt/0cbn
crw-------   1 root     sys       33,982 Feb 11  2006 /dev/rmt/0hbn
crw-------   1 root     sys       33,966 Feb 11  2006 /dev/rmt/0lbn
crw-------   1 root     sys       33,974 Feb 11  2006 /dev/rmt/0mbn
crw-------   1 root     sys       33,990 Feb 11  2006 /dev/rmt/0ubn

-- 
Darren

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