24 Oct
2004
24 Oct
'04
10:10 a.m.
Ethan Dicks wrote:
On Sun, Oct 24, 2004 at 03:41:45PM -0500, Doc Shipley
wrote:
Any recent Linux _should_ be doing the right thing. The only time
I've actually had trouble with a DLT was the aforementioned DLT4000 on
an RS/6000. AIX doesn't really believe that devices not IBM-branded can
perform up to spec, and sets them to the lowest possible common spec.
In this case, a hard setting of 512-byte blocksize.
A mksysb backup speeded up by a factor of 30 when Jonathan coaxed the
OS into using the drive's own settings.
Doc
It's amazing how much faster a DLT4000 runs
when you set the
blocksize to 0 (variable - allows the tape drive to set it and the app
to override) instead of 512 bytes. :)
Ooh! Nice! I may have to fiddle with that (I'm making personal backups
on some DLT drive of that vintage)