Re: DDS3 Tape drive not compressing?
From: Jan Gerrit Kootstra (jan.gerrit_at_kootstra.org.uk)
Date: 10/24/05
- Next message: Gupta: "Accessing HP-UX 11i file system from Windows XP"
- Previous message: Adam Skeggs: "DDS3 Tape drive not compressing?"
- In reply to: Adam Skeggs: "DDS3 Tape drive not compressing?"
- Next in thread: Frank Slootweg: "Re: DDS3 Tape drive not compressing?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: Mon, 24 Oct 2005 07:06:45 +0200
Adam Skeggs wrote:
> Hi,
>
> I have a HPUX 11.11 box with a C1537A tape drive which is I believe
> DDSIII. Trouble is I can't see that hardware compresssion is working.
>
> Using omniback the media look like DDSIII as the capacity is about 12Gb:
> $omnimm -media_info 581490 -detail
> ...
> Total blocks : 11743616
> (or is this the compressed capacity being reported? No that doesn't make
> much sense)
>
>
> Trouble is when I write 12Gb (added up totals from bdf) it's too much -
> thus there is no compression going on it seems.
>
> I am using the compression device: /dev/rmt/c1t0d0BEST which should be
> the right one.
>
> So I am a bit stumped.
>
> Any clues?
> Thanks,
> Adam.
>
>
Adam,
You do not tell us what kind of data you send to the tape. Some data
does not compress at all, so you end up with a tape that can contain
'only' 11GB (estimated based on your Total blocks).
Regards,
Jan Gerrit
- Next message: Gupta: "Accessing HP-UX 11i file system from Windows XP"
- Previous message: Adam Skeggs: "DDS3 Tape drive not compressing?"
- In reply to: Adam Skeggs: "DDS3 Tape drive not compressing?"
- Next in thread: Frank Slootweg: "Re: DDS3 Tape drive not compressing?"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
