How do TSM decide need to copy tape

Subject:	How do TSM decide need to copy tape
From:	"Frank Tsao, email is tsaof AT sce DOT com" <Frank.Tsao AT SCE DOT COM>
To:	ADSM-L AT VM.MARIST DOT EDU
Date:	Mon, 3 Apr 2006 10:09:12 -0700

I had an interesting situation: A volume in primary pool had a read error.
I used q vol f=d and found the last date of data written is around
January. Since then, I had several good backup on this tape. However, I
found on March 26, it had requested to make copy of this tape. Since this
tape is in error condition, the copy failed.

Do I have good data on the copy tape?

How do TSM decide need to copy tape?

How reliable I can trust the last read or written date?

Thanks for your help.

Frank Tsao
Frank.Tsao AT sce DOT com
PAX 25803, 626-302-5803
FAX 626-302-7131

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