LTO drive microcode may be a factor in this.  (See IBM site Readme
http://www-1.ibm.com/support/docview.wss?uid=ssg1S1002360
for a summary of microcode levels.)
You didn't mention your environment, but the 1117 "errno" would be
a Windows System Error number (rather than a Unix errno). There may be
further details of value in your Windows Event Log to try to get any
specifics, as the messages don't tell you anything much beyond there
being an I/O error.

    Richard Sims

On Jun 21, 2005, at 6:10 AM, Matthew Large wrote:

Chaps,
During the backup stgpool of a 1.7TB file, I got this message in the
actlog:

ANR8341I End-of-volume reached for LTO volume ACO215L2.
ANR8311E An I/O error occurred while accessing drive DRV01
(mt1.0.0.2) for
WEOF
operation, errno = 1117.
ANR9999D pvrntp.c(2648): ThreadId<63> Error writing EOT to NTP volume
ACO215L2.
ANR8468I LTO volume ACO215L2 dismounted from drive DRV01
(mt1.0.0.2) in
library IBM3583.
...