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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

3772.0. "exabyte 8505 can not write into tkz09 initialized tape." by GIDDAY::SHCHIU () Wed Jun 04 1997 03:12

    
    
    I have a customer site two diff tape drive
    exabyte 8505 and tkz09.
    
    the tape written under tkz09 can read read but NOT written under 
    exabyte 8505. But the vendor here claims the tape drive support
    read and write on different density , but they can not give
    info what format/density the 8505 can be written into.
    
    I understand tkz12 is an equivalence of exabyte 8505 , is this true ?
    
    Would tkz12 write with tape been initialize under tkz09 ?
    
    
    Can someone provide me some info pls ?
    
    
    rgds
    
    
    /stanley
T.RTitleUserPersonal
Name		DateLines
3772.1DECWET::RWALKERRoger Walker - Media ChangersWed Jun 04 1997 19:4611
	You don't state what O/S you are using.  The density setting
	for UNIX are in cam_data.c prior to 4.0 and ddr.dbase with	
	4.0 and above.  If the 8505 is not defined the defaults for
	a tape drive may not change the densities in the way you
	expect.  I imagine that VMS may have a similar problem if
	the 8505 is not a recognised device and is treated as a
	'default' tape drive.

	This is the difference between a 85xx and the TKZ versions.
	CSS has made sure that the O/S groups provide device
	recognition for the TKZ devices.
3772.2Compatiblity issueCSC32::GILDEMEYERWed Jun 04 1997 21:2611
    The Exabyte 8505 drive has compression and the power up default is to
    write in compression mode.  The TKZ09 is an Exabyte 8500 without
    compression, therefore the TKZ09 is unable to read a tape written on
    an 8505 in compression. 
    
    If the customer had access to an Exabyte 8500C, the tape from the
    8505 could be read.
    
    Paul Gildemeyer
    Vendor Storage Support
    Colorado Springs CSC
3772.3will try to use /MEDIA=NOCOMPACT GIDDAY::SHCHIUFri Jun 06 1997 09:0217
    
    
    
    reply .*
    
    the exabyte 8505 is connected to ALP/VMS V6.2 system
    tkz09 is on vax/vms v6.2.
    
    if tkz09 is non compress mode tape drive, I think I will
    get user to mount the tape with /media=nocompaction on the
    exabyte 8505 to see if this fixes the problem.
    
    
    thanks.
    
    
    /stanley