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Conference stkhlm::magtape

Title:MAGNETIC TAPEDRIVES
Moderator:STKHLM::GJOHNSSON
Created:Mon Sep 21 1987
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:3775
Total number of notes:13147

3635.0. "Backup to TLZ06, the system hang." by ZPOVC::DAIVC::HERU () Tue Jan 28 1997 02:35


 Hello...

 I am Heru, my customer PT.AMT has problem with their MV3100-90
 when doing backup a file (+/- 800000 blocks) to internal DAT drive
 (TLZ06) the machine hang. Need to restart the machine for continuing 
 operation.

 The machine has H/W configuration :
 - 3 disks + TLZ06 + TK50 (external) in SCSI bus port A
 - 5 disks in SCSI bus port B
 - Memory 64 MB

 VMS version V5.5-2H4, and user account has UAF parameters below:
 
 Fillm  : 100        WSdef    : 4000
 BIOlm  : 150        WSextent : 16000
 Enqlm  : 2000       WSquo    : 4000
 Bytlm  : 66000      Pgflquo  : 100000
 JTquo  : 4960   

 Are there problem with H/W configuration and parameters ?
 Are there limited file sizes to backup to TLZ06 drive ?

 I am glad with your help and response.

 Thank a lot,

 Heru::daivc
T.RTitleUserPersonal
Name		DateLines
3635.1Need more detailsSUBSYS::adapt1.shr.dec.com::dlanehttp://adapt1.shr.dec.com:80/index.htmTue Jan 28 1997 14:274
How far into the backup before it hangs? Are there any errors reported
in the error log before the hang? A few more details would help.

Dana Lane
3635.2COOKIE::FROEHLINLet's RAID the Internet!Tue Jan 28 1997 21:4913
    What do you mean by "hang"? Do they get a control-t or control-y
    response at that point?
    
    What's the size of the pagefile?
    
    A wild guess: problem on SCSI bus. What kind of disk drives do they
    use?
    
    You can crash the system and find out from the crash dump what's going
    on. They should at least do a "REPLY/ENABLE" before starting the
    backup. This is an online backup, right?
    
    Guenther
3635.3misinformation problemZPOVC::DAIVC::HERUMon Feb 03 1997 04:1316
 Hello Team ...

 Thank you for your replys to my problem. Just the moment I got an information from
 my customer that their machine was not hang when doing backup (all user still can access),
 but the DAT drive's LED blinking for very long time (more than the time needed for -
 +/- 800000 block). In this situation, the user couldn't cancel backup process, so they
 need to restart the system. I am sorry for misinformation.
 I have already delivered the external DAT drive TLZ06-DA to my customer for temporrary
 action, until they send the e-mail for detail information.
 I will inform you  in this topic for the next progress if there is an interresting log.
    
 Regards,

 Heru::daivc
3635.4.3 for the 80 columns challengedCOOKIE::FROEHLINLet's RAID the Internet!Tue Feb 04 1997 01:4217
    Hello Team ...
    
    Thank you for your replys to my problem. Just the moment I got an 
    information from my customer that their machine was not hang when 
    doing backup (all user still can access), but the DAT drive's LED 
    blinking for very long time (more than the time needed for +/- 800000 
    block). In this situation, the user couldn't cancel backup process, 
    so they need to restart the system. I am sorry for misinformation.
    
    I have already delivered the external DAT drive TLZ06-DA to my customer 
    for temporrary action, until they send the e-mail for detail information.
    I will inform you  in this topic for the next progress if there is an 
    interresting log.
    
    Regards,
    
    Heru::daivc
3635.5COOKIE::FROEHLINLet's RAID the Internet!Tue Feb 04 1997 01:457
    Did they try to STOP/ID the user process doing the backup? If so, did
    the process end up in RWAST mode in SHOW SYSTEM?
    
    They could have used a BACKUP/LOG to watch any progress. Or use
    occasional control-Ts at the terminal where BACKUP was started.
    
    Guenther