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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