No.  As soon as you relabel the tape, it is not possible using normal
means to read past the EOM (end of media) marker.  I'm not saying it's
not possible.  I'm saying that you won't be able to read it without
writing hacking/custom code.  You should consult with a legal advisor as
to whether or not it would still be considered residual/discoverable
data.  I have my opinion, but I wouldn't want to be accused of giving
legal advice. ;)

---
W. Curtis Preston
Backup Blog @ www.backupcentral.com
VP Data Protection, GlassHouse Technologies 

-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Wood, R A (Bob)
Sent: Tuesday, October 02, 2007 2:42 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] How best to script re-labeling tapes ...

Curtis,
        That's an interesting concept. Does that imply that any tape
that is reused and only partially written will have discoverable
residual data on it from its previous use? 

        Taken to its logical conclusion, then, either the tape has to be
zeroed throughout its entire length before reuse or destroyed when it
becomes recyclable. I'm sure I read somewhere that LTO tapes can't be
degaussed, that would place an operational overhead, writing to the
whole tape before reuse, that may make recycling less economically
viable than destruction. Not very 'green' is it?

Regards
Bob

Bob Wood
Senior Technical Analyst

ITC - EMEAE London eHub
Chevron Limited
1 Westferry Circus, Canary Wharf
London, E14 4HA
Tel +44(0)20 7719 3885
Fax +44(0)20 7719 5101
woodr AT chevron DOT com

Chevron Limited. Registered in England and Wales (145197). Registered
office 1 Westferry Circus, Canary Wharf, London, England, E14 4HA


 

>-----Original Message-----
>From: EMC NetWorker discussion 
>[mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On Behalf Of Curtis Preston
>Sent: 01 October 2007 22:17
>To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
>Subject: Re: [Networker] How best to script re-labeling tapes ...
>
>Tim Mooney said:
>>Why, you ask?  Because I work for an institution in an American state 
>>that has "Open Records" laws.  If NetWorker hasn't relabled a
>recycleable
>>tape and an information discovery request comes in, I'm 
>obligated to do 
>>the restore.  If we force NetWorker to recycle tapes as soon as all
>data
>>on the tape has passed our retention window, rather than 
>leaving it to 
>>NetWorker's whims, we have greater control over our data retention.
>
>Actually, according to the recently updated Federal Rules for 
>Civil Procedures, this now applies to all states.  What you've 
>described is considered "residual data," the likes of a file 
>that's deleted on a filesystem that can make it un-deleted.  
>Residual data is discoverable.
>
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