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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

6751.0. "Erasing revectored blocks on SCSI drive" by CSC32::T_HUTCHIN () Wed Jun 04 1997 13:05

    
    Is there any way to "de-classify" an HSD30-based or HSD05-based RZ29?
    
    This is a secure site and the customer wants to remove the RZ.  However,
    while he can over-write any VMS-accessible block with a DOD erase
    pattern, he's concerned about sensitive data in revectored bad blocks.
    
    Since these blocks are not directly accessible to VMS, data in 
    revectored blocks can't be touched via conventional methods.  
    
    Is there any accepted method for ensuring that ALL blocks on a SCSI 
    drive are completely erased?
    
    Thanks,                           
    
    Terry Hutchin
    MCS Storage
    Colorado Springs
T.RTitleUserPersonal
Name		DateLines
6751.1SUBSYS::VIDIOT::PATENAUDEAsk your boss for ARRAY's...Wed Jun 04 1997 20:288
    
    Reformat and disgard the G list. Not easy in the field without a pc
    tool like CoComp.
    
    Or platter removal.
    
    Roger.
6751.2well, not exactlySUBSYS::BROWNSCSI and DSSI advice given cheerfullyThu Jun 05 1997 10:068
    If you reformat before erasing, then any spares
    used by G-list LBAs won't be erased.
    
    Erasing a disk is one of those subjects where, the more you know,
    the more gotchas you see.  If you don't want to explore the subject
    in depth, and you want an adequate tool, consider Norton and CoComp.
    If you want to learn more, look for some earlier notes on this subject.
    Try NOTES> DIR/TITLE=ERASE or NOTES> DIR/TITLE=DECLASS.