Quote:>On AIX, it is possible to change the block size of the tape drive. Maybe
>this it possible in Solaris too???
It's been a while since I used AIX much (seven years), so "block size
of a tape drive" isn't making a lot of sense to me. Does that mean
that you set a block size for the tape drive, and then whenever you
write a tape from then on, the kernel uses blocks of that size?
On Solaris, this is handled differently. Whenever you insert a tape
and start writing to it, whatever size block is the first write() you
issue becomes the block size for the tape. (Or is that the block size
just for the one file? I can't remember.)
In fact, IIRC there used to be a bug where if you inserted a tape that
had data on it, then Solaris would determine the block size of the data
already written on it and use that, no matter what you tried to do.
This was pretty irritating, as it meant that running the same backup
script on a recycled tape (from a big pile of incremental backups that
were used 3 months ago, for example) gave different results than
running it on a completely new tape. (There was some workaround for
this, too, but I can't remember what it was. But that was on SunOS
4.1.3, so I probably don't care anyway...)
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