- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: Purpose of different tape device files
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-06-2012 04:51 AM
тАО01-06-2012 04:51 AM
Purpose of different tape device files
Hi All,
I am seeing 8 device files for single tape drive in HPUX...
#ioscan -funC tape
Class I H/W Path Driver S/W State H/W Type Description
=====================================================================
tape 0 0/5/2/0.1.0 stape CLAIMED DEVICE HP Ultrium 1-SCSI
/dev/rmt/0m /dev/rmt/0mn /dev/rmt/c4t1d0BEST /dev/rmt/c4t1d0BESTn
/dev/rmt/0mb /dev/rmt/0mnb /dev/rmt/c4t1d0BESTb /dev/rmt/c4t1d0BESTnb
Could you please explain the purpose of each one and which one is default and which we have to use for better result...
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-06-2012 05:00 AM - edited тАО01-06-2012 05:04 AM
тАО01-06-2012 05:00 AM - edited тАО01-06-2012 05:04 AM
Re: Purpose of different tape device files
BEST is best density possible (same as 0m); BESTb is Berkeley style; "n" always means "no rewind".
For AT&T vs. Berkeley see http://h30499.www3.hp.com/t5/General/Tape-AT-amp-T-and-Berkeley-style/td-p/4472927
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-06-2012 08:49 AM
тАО01-06-2012 08:49 AM
Re: Purpose of different tape device files
The '0m' names (0m, 0mn, 0mb, 0mnb) are alternate names for the c4t1d0BEST names (c4t1d0BEST = 0m, c4t1d0BESTn = 0mn, etc.).
Torsten has already given a good explanation of the *m,mn,mb,mnb names.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-06-2012 05:34 PM
тАО01-06-2012 05:34 PM
Re: Purpose of different tape device files
There is a special command to decode the device files: lssf
lssf /dev/rmt/*
The various device files are used to set specific behaviors for the tape drive such as rewind after close, compression on or off, etc. These device files are used with programs that do not provide methods to handle these features. tar is an example. Although it is called tape file archive, it has no controls for tape drive, so these device files take care of the desired behavior.
Bill Hassell, sysadmin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-12-2012 03:10 AM
тАО01-12-2012 03:10 AM
Re: Purpose of different tape device files
Thanks a lot for your informations...
What is difference between re-wind and no-rewind?
Which option is best and why and where?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-12-2012 03:30 AM
тАО01-12-2012 03:30 AM
Re: Purpose of different tape device files
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-12-2012 04:24 PM
тАО01-12-2012 04:24 PM
Re: Purpose of different tape device files
>Which option is best and why and where?
I depends. If you want to append to the tape, you need norewind.
You also need it to use mt(1) to space forward, otherwise, it is rewound after mt(1) closes the file.