Any one used DC 6250 tapes?

[Dan Watts]

Anyone ever use the new 3M DC6250 data cartridges? The label
says they are 250 Mbytes (1020 ft [310.9m]).  There's a note
about usage of extended tapes on certain tape drives may cause
a change in the head wear pattern which could lead to increased
error rates and reduced head life, especially when using both
standard and extended length tapes on the same drive.

Anyone able to comment on this warning? Anyone from SGI?  My
system is a Personal Iris with the stock QIC-150 drive that
came with the system.
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