Hi,

This weekend we are upgrading all of our tape drives
(in 2 libraries) from 3592-E05 (TS1120) to 3592-E07 (TS1140).

The libraries currently have a mix of JA and JB media.
We will be migrating over time to all new JC media.

JA tapes are READONLY   on 3592-E07 drives.
JB tapes are READ/WRITE on 3592-E07 drives.

The plan is to:
- Export out of the lib all current scratch JA/JB media.
- Mark all existing JA/JB media ReadOnly.
- Insert lots of new JC media.
- TSM will write to the new JC tapes.
- As JA/JB tapes drop to scratch, export them out of the
    Library, and insert more JC media.

When JA/JB tapes drop to SCRATCH status, I'm not sure I will always
be able to export them before TSM might try and reuse them.  If TSM
tries to use a JB tape, that is OK - it will work.  But what
if TSM selects a JA tape and tries to use it.  That would fail since
3592-E07 drives can READ JA media but NOT WRITE to them.

Q) Is TSM smart enough to not load a JA media into a 3592-E07
   drive for writing?

TSM has the media_type of all tapes (q libvol f=d), so I would think it
should know not to do this.

Thanks

Rick






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