| Title: | DIGITAL UNIX (FORMERLY KNOWN AS DEC OSF/1) |
| Notice: | Welcome to the Digital UNIX Conference |
| Moderator: | SMURF::DENHAM |
| Created: | Thu Mar 16 1995 |
| Last Modified: | Fri Jun 06 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 10068 |
| Total number of notes: | 35879 |
Hypothetically, if Digital sold a version of the Quantum DLT 7000 could Digital UNIX use all the "densities" it provides, when writing? Tx85 format (2.6 GB) Tx86 format (6 GB) DLT 2000 format (compressed and non-compressed; 10 native) DLT 4000 format (compressed and non-compressed; 20 native) DLT 7000 format (compressed and non-compressed; 35 native) Typically Digital UNIX has only ever supported up to four densities, but the DLT 7000 is a fairly extreme case having 8 choices. There might be some what would like to write tapes that can be read by their old TZ85.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 8860.1 | Up to eight | NETRIX::"[email protected]" | Jan Reimers | Fri Feb 21 1997 15:00 | 14 |
As of V4.0, Digital UNIX has provided the DDR database, which allows
up to 8 densities for tape devices. However, you need to have device
naming turned on (default is turned off), which provides special device
names of the form:
/dev/tape/tape_d0
/dev/tape/tape_d1
...
/dev/tape/tape_d7
Then you may (probably) need to modify the ddr database (/etc/ddr.dbase)
to add the densities for the drive. After doing that, the ddr database
has be be reconfigured with:
# ddr_config -c
[Posted by WWW Notes gateway]
| |||||
| 8860.2 | NABETH::alan | Dr. File System's Home for Wayward Inodes. | Tue Feb 25 1997 19:06 | 16 | |
For any that are interested, I had the opportunity to check what densities correspond to what devices on such a drive (were it to exist...) and got: rmt?h with CompacTape IV: 35 GB + Compression rmt?a with CompacTape IV: 20 GB rmt?m with CompacTape IV: 35 GB rmt?l with CompacTape IV: 20 GB + Compression rmt?h with CompacTape III: 10/15 GB + Compression rmt?m with CompacTape III: 10/15 GB rmt?a with CompacTape III: I/O error rmt?l with CompacTape III: I/O error I was hoping for TZ86 and TZ85 densities for a and l instead of I/O errors, but six out of eight isn't bad. | |||||