I also have used SDLT tapes for 2 year and they are still well,
LTO tapes just were bought four month ago. I will check again to see whether
drive is error.
>The capacity of your tapes are related to your compression-rate. Since all
data is not the same, you'll see different rates for >different kinds of
data
I think it is true if I use soft compression.
What is hard-compression different from soft-compression ?
In my opinion, when using hard compression, tape stores more data because
data is written on tape closely .
I use hard compression (no compresss from client) so I think it is only
related to hardware. and capacity of tape is similar ?
----- Original Message -----
From: "Granhagen Anders" <Anders.Granhagen AT ATEA DOT COM>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Tuesday, July 05, 2005 3:16 PM
Subject: SV: LTO2 is unconfident
Read/Write errors happens to all tape technologies, in my experience less
frequently on LTO than many others. If you experience a lot of errors on
your tapes, fist make sure that you clean your tape drives frequently, then
see if you can relate the errors to any specific tape drive. If you can, and
you continue to see problems, contact your vendor for support.
The capacity of your tapes are related to your compression-rate. Since all
data is not the same, you'll see different rates for different kinds of
data. For instance, you might see very high compression rates for some
databases, and low/none compression rates for already compressed data like
jpeg-images, mpeg movies, zip/rar/lz compressed files etc.
Regards,
___________________________________
Anders Granhagen
Atea System Platforms
(Phone: +46 8 4708104 (Mobile: +46 709 197218
-----Ursprungligt meddelande-----
Fren: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Fvr nghiatd
Skickat: den 5 juli 2005 09:02
Till: ADSM-L AT VM.MARIST DOT EDU
Dmne: LTO2 is unconfident
Hi,
I use 4560SLX with two LTO gen2 drives, I have 30 tape LTO2. And now my
system wrote data on 22 tapes. When I use q vol f=d' to check status of
tape, I see :
a.. 9 tapes have 'Access=Read-Only', 'Number of Write Errors: 1'
b.. 1 tape has 'Access=Unavailable', 'Number of Write Errors: 1
In addition, Capacity of tape aslo display lot of different value (629,557.2
MB; 372,665.2 MB; 481,247.3 MB) although capacity of tapes is 200/400 GB.
Nghiatd,
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