Inquire output.
Lto2 media is 3 brands. No pattern to what will or wont read.


[email protected]:IBM     ULTRIUM-TD4     7381|Tape, /dev/rmt/43cbn
                                           S/N: 1310050477
                                           ATNN=IBM     ULTRIUM-TD4
1310050477
                                           WWNN=500104F00086C086
                                           WWPN=500104F00086C087
                                           PORT=00000001
Kit



-----Original Message-----
From: Francis Swasey [mailto:Frank.Swasey AT uvm DOT edu] 
Sent: Friday, 5 June 2009 9:17 PM
To: EMC NetWorker discussion; Kit Cunningham
Subject: Re: [Networker] LTO2 tapes with L1 in label

This is giving me pause.  The LTO specification is very clear that LTO4
drives must read LTO2 
media -- or they don't meet the specification and are not LTO qualified.

What model IBM drive do you have?  What firmware level?  Who manufactured
your LTO2 media?

Thanks,
   Frank

On 6/5/09 1:14 AM, Kit Cunningham wrote:
> My experience supports what Jock states
> 
> A client replaced 3 x LTO2 with LTO4 in 2 libraries (SL500 , IBM drives).
> The LTO4 drives could randomly read some LTO2 tapes completely, some
> partially and some not at all.
> 
> We had to put an LTO2 back in one library for LTO2 recovery.
> 
> We also had LTO2 tapes with LTO1 barcodes. My memory is that Networker
7.3.x
> would try to load the tape into an LTO4 but the library would give an
> incompatible medium. We had to put LTO2 barcodes on them.
> 
> Regards
> 
> Kit
> 
> Kit Cunningham
> Krisanya PTY Ltd
> IDATATools for NetWorker
> 
> 
> 
> -----Original Message-----
> From: Francis Swasey [mailto:Frank.Swasey AT UVM DOT EDU] 
> Sent: Thursday, 4 June 2009 9:26 PM
> Subject: Re: LTO2 tapes with L1 in label
> 
> On 6/3/09 5:30 PM, Howie Jock wrote:
>> Hi Jim
>>
>> YMMV but in my experience (IBM TS3310 tape library with LTO3 & LTO4
>> drives) LTO4 drives cannot be assumed to read LTO2 tapes. Our LTO3
>> drives can read & write LTO2 tapes reliably but the LTO4 drives cannot
>> even load them.
> 
> The LTO specs *require* that LTO4 drives load and read (not write) LTO2
> media.
> 
> If NetWorker believes the tapes are LTO1 media (because of their barcode),
> it may not even try 
> to load them into the LTO4 drives.  However, if it does actually load the
> media, the drive 
> should be able to figure out it is LTO2 media and properly read it.  If it
> doesn't -- then the 
> drive manufacturer (I assume IBM in this case) is not following the LTO
> specification and can't 
> really claim that the drive is an LTO4 drive.
> 
> Frank
> 
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-- 
Frank Swasey                    | http://www.uvm.edu/~fcs
Sr Systems Administrator        | Always remember: You are UNIQUE,
University of Vermont           |    just like everyone else.
   "I am not young enough to know everything." - Oscar Wilde (1854-1900)

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