It sounds like a bad tape to me.
But then, I have seen write errors on tapes that where caused by cancelling 
storage pool reclamation. This will give you read errors when you get to that 
spot on the tape.
We are using AIT tapes and we have reused those tapes without any problems.

Leo Humar
LCS Pty Ltd
lhumar AT bigpond.net DOT au

No trees were killed in the sending of this message. However a large
number of electrons were terribly inconvenienced.

    -----Original Message-----
    From: Michael Garnebode <Michael_Garnebode AT WESTLB DOT DE>
    To: ADSM-L AT VM.MARIST DOT EDU <ADSM-L AT VM.MARIST DOT EDU>
    Date: 4 August 1999 15:31
    Subject: Can i reuse this tape
    
    
    Hi all,
    i do a move data on a DLTIV Tape with dlt7000 drive
    and i have found following error:
     
    ANR9999D pvrgts.c(4273): Invalid block header read from
     volume B0034. (magic=8285, ver=1, Hdr blk=248120
     <expected 248121>, db=262128 <262144,262144,0>)
    ANR1146W Move data process terminated for volume B0034 -
     excessive read errors encountered.
     
    I can restore this volume from my copypool. 
    My question is can i reuse this volume when hi goes scratch 
    or is this tape physical damaged ???
    
    
    Michael Garnebode
    Schmitz-Rz-Consult
    Am Blumersfeld 22
    50259 Pulheim
     
    Fon: +049- 0171-1783561
     
    IBM Certified Specialist RS/6000 SP
    IBM Certified Specialist AIX V4.1 Support