Hi everybody!
3494 Library with four  3590 tape drives dont want to  mount volumes  after TSM 
upgrade  runnig on
aix 4.3.3 from  3.7.4 to 4.2.1.7

Error mesage from tsm console is :

ANR8304E Time out error on drive 3494DRV11 (/dev/rmt0) in library 3494LIB1.
ANR8472I Error reading label of volume in drive 3494DRV11 (/dev/rmt0) of 
library 3494LIB1.
ANR8311E An I/O error occurred while accessing drive 3494DRV11 (/dev/rmt0) for 
OFFL operation,
errno = 22.
failed.
ANR8310E An I/O error occurred while accessing library 3494LIB1.


any help would be great!