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Conference ssag::ask_ssag

Title:	Ask the Storage Architecture Group
Notice:	Check out our web page at http://www-starch.shr.dec.com
Moderator:	SSAG::TERZAN

Created:	Wed Oct 15 1986
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	6756
Total number of notes:	25276

6399.0. "120m tapes on TLZ07" by ATZIS3::JETZINGER_J () Mon Feb 17 1997 07:11

    A customer has two Prioris HX with SCO OpenServer 5, Mylex RAID
    controller and TLZ07 DAT tape.
    When he uses 120m tapes, the backup program very often shows media
    errors or hangs. When he uses 90m tapes, he almost never has this
    problems.
    On one server the TLZ07 has already been replaced.
    Compression is not used at the moment.
        
    Are there any known problems with 120m tapes ?
        
    Thanks for any info.
        
      Josef Jetzinger
        MCS Austria

T.R Title User Personal
Name Date Lines

6399.1 LEFTY::CWILLIAMS CD or not CD, that's the question Mon Feb 17 1997 12:40 15

T.R	Title	User	Personal Name	Date	Lines
6399.1		LEFTY::CWILLIAMS	CD or not CD, that's the question	`Mon Feb 17 1997 12:40`	15
	Whose 120 meter DDS-2 tapes? Digital labeled, or another mfgr? What code rev TLZ07? What kind of media errors? How often is "very often"? DDS-2 120 M tapes have a slightly higher soft error rate than the shorter tapes, but should work fine. There are no known systematic problems with this tape. Cheap DDS-2 tapes have been known to have problems. Also, it is possible that the customer has a bad batch of tape - have you tries some Digital tapes with a different lot #? Chris

    Whose 120 meter DDS-2 tapes?  Digital labeled, or another mfgr?
    What code rev TLZ07?
    What kind of media errors?
    How often is "very often"?
    
    DDS-2 120 M tapes have a slightly higher soft error rate than the
    shorter tapes, but should work fine. There are no known systematic
    problems with this tape.
    
    Cheap DDS-2 tapes have been known to have problems. Also, it is
    possible that the customer has a bad batch of tape - have you tries
    some Digital tapes with a different lot #? 
    
    Chris