SCSI DDS tape compression
2009-01-21 12:25:13
Hi,
I am using amanda with DDS tapes without h/w compression and during
boot the compression is disabled using mt. I noticed however a
different behaviour between the mt in the cpio 2.6 package (in opensuse
10.2) and the version 2.9 which is in opensuse 11.1.
The command is "mt -f [dev] datcompression [count]"
The mt man page says:
- if count is 0 -> compression off
- if count == 1 -> status is printed
- if anything else, or blank -> compression on
However in 2.6:
- if count == 0 -> off
- if count == 1 or blank -> status is printed
- anyhing else -> on
And in 2.9:
- if count == 0 -> off
- if anything else (including 1 or blank) -> on
and there is no count value which gives the "status printed"
This is of course not an amanda issue, but I thought it worthwhile to
let you know, in case you were also using "1" as the inquiry count,
but it actually enabled the compression again.
Regards,
Charles
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