ITEM: P8408L

Getting missing header block errors with sysback ver 3

Response:

Env: AIX 3.2.5
     RISC 380
     Tape: 8mm 5gb (7208-011)
     sysback 3.1.0.27

Desc:  
      Customer is restoring from a sysback full system backup.
      and is getting the following errors.
     
       Missing Header Block - Attempt to Resync after error,
       Resync @ file: filename

       He states that he is getting multiple filenames with this message
       repeated.

Action:
       The customer has another 3.2.5 system with a tape drive.
       The customer was able to verify the data on the system with
       the sysrestore -lf /dev/rmt0 -vrootvg
       (This worked correctly)

       It sounds like the problem with the libc.a and fwrite at
       3.2.5R. (3.2.5 E3 Oct '94  Release Notes 1.3)
       
       I am having the customer create bosboot (sysback) diskettes
       on the system he could read and verify the backup on.  

        1.  Create diskettes (other system)
        2.  boot system off of diskettes
        3.  change input device to tape drive
        4.  start the install
           

  I am going to have the customer check for these ptfs:

  A problem was found in AIX 3.2.5 Enhancement 3 with the fwrite
 subroutine in libc.  A technical description of the problem
 follows.  This problem exists in the following AIX 3.2.5 PTFs:

 U432990, U433061, U433288, U433563, U433872, U434069

 The problem is fixed in PTF U434513, which is currently available.

  When sysback ver 3 reads the data it uses this method:
  sbread | restore

  The sbread command uses the fwrite to send the data to stdout
  So since the fwrite command is messed up it will cause the data
  to look corrupt even though the data is not.  

  NOTE:  The data is not corrupt!!!!!!!!!


Response:

  The customer called back the system rebooted up fine.

  The cutomer had ptf U433288 on his system so I ordered
  ptf U434997 which is the supercede U434513 for for the customer.

 THE FOLLOWING PTFS HAVE BEEN ORDERED:
 U434997 (3250)
 EVERYTHING HAS BEEN ORDERED  



Support Line: Getting missing header block errors with sysback ver 3 ITEM: P8408L

Dated: December 1994 Category: N/A

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