RE: Tape Density Question

["Allen, Stuart" <sallen@xxxxxxxxxxxx>]

These 8mm drives can take a tape thats formatted up to *FMT7GB.  The message
is basically warning you that you aren't formatting the tapes to the
"standard" format for that device - ie 7gb.
Of course you'll need to have tapes that are capable of being formatted to
7gb - I haven't got any Maxell ones, but my Exabyte tapes are "160m XL".

Data transfer should be circa 500Kb/sec uncompressed, with up to 1Mb/sec
compressed.

I can't find any info as to settings for data compression/compaction for
this drive.  However, in the Backup & Recovery manual, the recommended
settings for our internal 8mm drive(6390) is DTACPR *DEV, COMPACT *DEV,
USEOPTBLK *NO.  I'd experiment with the latter to see if it makes any
difference.

HTH

Regards,
Stuart
                                     
Stuart Allen
European Systems Analyst
Fellowes

mailto:sallen@fellowes.com


> -----Original Message-----
> From: Howard Weatherly [SMTP:hweatherly@dlis.dla.mil]
> Sent: Thursday, December 02, 1999 2:19 PM
> To:   MIDRANGE-L@midrange.com
> Subject:      Re: Tape Density Question
> 
> What value does *DEVD refer to? Maybe changing that would get rid of the
> messages. We have an Exabyte 8mm and we have not been able to get it to go
> very
> fast either.
> 
> Chuck Lewis wrote:
> 
> > Hi Folks,
> >
> > We have an IBM 9427-210 Cartridge tape unit (if anyone wants to donate
> > something faster...).
> >
> > I format the tapes (Maxell HS-8/112 Helical-Scan 8mm Data Cartridge) at
> > 5GB.
> >
> > When I save something I get a message CPF4204 "Volume 'nnnnnnnnnn' on
> > device TAP01 is density *FMT5GB". And the cause "The output volume is a
> > different density than specified for file QSYSTAP in QSYS. blah, blah,
> > blah".
> >
> > File QYS/QSYSTAP shows as DENSITY(*DEVD). Everything saves (and
> > restores) OK, but not very fast...
> >
> > Is this OK or is there something I should be doing ?
> >
> > TIA,
> >
> > Chuck
> >
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