Hi, Our customer have a STK9310 with STK9840-/9940b drives... One of the 9940 drives started to give him the following error in ACSLS when he starts a job in NBU. The error is: "Unkown_LH_TYPE (68612) No format for LH_ADDR_TYPE (68612):Library Error, Cancel Pending" We tried several 9940 drives and had the same error... the drive also goes down and then in a AVR state. It's a Solaris server with NBU5.1... We also reconfigured NBU... all in vain... The drives were all tested with other server/s and worked. Did any body experience the same error or please share some knowledge on the error message. This drive is the only drive direct attached to the server. Your help will be appreciated.