The question:
Is the CAM SCSI Medium Changer kit (CLCMC314, in this case) a subset of CAM
SCSI Layered Products kit (CLC31)? I've installed a TL891 library on a
4100 and just want to make sure I don't need to load both kits.
The Answer:
My deepest thanks to Allan Rollow for some great info. Here's what he
wrote:
If you have the CLC kit (V3.1A or V3.1B) off the MRU CDROM and
you're running V4.0D or later, your system is about to crash.
As long as you don't touch the "mc" special device files with
any command you're probably ok until you delete the old kit
and install the correct one. MRU V1.2 shipped just enough
before V4.0D that we didn't have time to include the latest
CLC kit. Then we discovered that the CLC kit we included
would install on V4.0D and cause it to crash. Fortunately,
the correct CLC kit is on the Associated Products CDROMs (V3.1C).
Our next version of MRU will include a safer kit, but we do
recommend that you use the Associated Products kit when there
is one.
If you're running V4.0C and earlier, all the CLC kits on the
MRU CDROM are safe. I don't recall V3.1C offering much more
than fixing the V4.0D crash. V3.1D, which is included with
Digital UNIX V4.0E fixes a bug in the internal driver imple-
mentation of Send Volume Tag and "remembers" the permissions
of the "mc" special files across reboots.
And just to be particular, the CLC kit doesn't include a tape
driver. The media changer driver doesn't care what sort of
drive the changer is serviceing; tape, optical, or some SCSI
widget that grabs books of a shelf... The tape driver is
part of the base system and only controls Sequential Access
devices.
Received on Fri Feb 12 1999 - 17:22:44 NZDT