Very Computer

by **Randy Marchan** » Fri, 17 Apr 1998 04:00:00

We have an Ultra 140, running Solaris 2.6, Solstice Backup 5.0.1 and it
has a DLT 4700 autoloader (7 cartridge capacity). We have the drive
loaded with CompactIV tapes which supposedly yield 40GB density.
The Solstice Backup device name is /dev/rmt/1mbn.

We're trying to get the 40GB capacity but are not able to do so. The nwadmin
utility seems to indicate we're getting slightly over 20GB/tape.

We see conflicting information about the density capacity of the
DLT4700. The sun www site DLT4700 spec page says the read/write
compatibility is 20GB for a CompactIV tape. Yet, the product overview
page for the DLT4700 says the drive can store up to 280GB which is the
7*40GB/Tape figure. Which doc should we believe?

So, how do we set up Solstice Backup and the DLT4700 to give us the 40GB
capacity/CompactIV tape? Has anyone else run into this problem?

TIA
Randy Marchany
VA Computing Center
Blacksburg, VA 24060

by **Andreas Sinderman** » Fri, 17 Apr 1998 04:00:00

> We have an Ultra 140, running Solaris 2.6, Solstice Backup 5.0.1 and it
> has a DLT 4700 autoloader (7 cartridge capacity). We have the drive
> loaded with CompactIV tapes which supposedly yield 40GB density.
> The Solstice Backup device name is /dev/rmt/1mbn.

Try /dev/rmt/1cbn which should switch on compress mode.

Andreas

by **Mike Marsha** » Fri, 17 Apr 1998 04:00:00

>> We have an Ultra 140, running Solaris 2.6, Solstice Backup 5.0.1 and it
>> has a DLT 4700 autoloader (7 cartridge capacity). We have the drive
>> loaded with CompactIV tapes which supposedly yield 40GB density.
>> The Solstice Backup device name is /dev/rmt/1mbn.
>Try /dev/rmt/1cbn which should switch on compress mode.

And try pressing the button on the front of the drive which
specifies the highest density. They seem to default to lowest,
and/or default to whatever was last written to the tape.

After high density tracks have been written to a particular tape,
the drive will default to high density whenever that tape
is inserted...

-Mike

by **Oliver Hilgendo** » Sun, 19 Apr 1998 04:00:00

On 16 Apr 1998 16:07:48 GMT, Randy Marchany

>So, how do we set up Solstice Backup and the DLT4700 to give us the 40GB
>capacity/CompactIV tape? Has anyone else run into this problem?

40GB is the compressed capacity. Native is 20GB.

Very Computer

DLT4700 density - how to get 40GB/tape

DLT4700 density - how to get 40GB/tape

DLT4700 density - how to get 40GB/tape

DLT4700 density - how to get 40GB/tape

DLT4700 density - how to get 40GB/tape