On Tue, 17 Apr 2007, bob944 wrote:

>> 04/16/2007 19:04:26 - Warning bptm (pid=4728) read error on media id
>> AB1234, drive index 1 reading header block, Cannot allocate memory
>>
>> Anyone ever get this when trying to a restore? How did you fix it?
>
> What buffer size was used to record the backup, how many buffers are you
> using for the restore, and does the media server have enough shared
> memory to handle it?
>
> The bptm log should show all the buffer allocations and shared-memory
> allocation.  Does that show a problem?  Do you have
> NUMBER_DATA_BUFFERS_RESTORE set?  Remember, the restore is going to need
> the number_buffers times the size_buffers as they exist on tape.
>
> For that matter, can the media server's tape device driver handle the
> buffer size?  Untested restores after buffer size tuning, especially
> with Windows drivers, run into this all the time--though I don't
> remember the error message.  Also, restoring a foreign tape which has
> bufsize that was fine on the original environment can run into the same
> thing--yet another good reason not to use "hey, what's a good
> SIZE_DATA_BUFFERS to use for LTO3?" advice.
>
> Workarounds:
> o  shm settings
> o  driver update
> o  is there an environment in which you can duplicate the image to disk
> or tape with favorable buffer settings, and restore from the copy?
> o  dump the tape and see what the files and records look like--perhaps
> it was overwritten
>

The environment's media servers were removed and new ones were put into 
place, all of the *BUFFER* settings should remain the same as that part is 
automated.   I will check the bptm log.  This is a Linux host.