- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: raw and block device files
Operating System - HP-UX
1748056
Members
4963
Online
108758
Solutions
Forums
Categories
Company
Local Language
юдл
back
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
юдл
back
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
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- 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
тАО01-30-2009 02:43 AM
тАО01-30-2009 02:43 AM
raw and block device files
Hi,
1.I just want to know the difference between block and raw device files.As per my knowledge block files are used to store datas in hard disk.Then whats the role of raw files.I have heard that raw device used to store dbf files.
I think raw devices are logical,will be used while initializing the hard disk.
2. How we can create a vg for raw files only.
Please help me to understand this
Regards,
himacs
1.I just want to know the difference between block and raw device files.As per my knowledge block files are used to store datas in hard disk.Then whats the role of raw files.I have heard that raw device used to store dbf files.
I think raw devices are logical,will be used while initializing the hard disk.
2. How we can create a vg for raw files only.
Please help me to understand this
Regards,
himacs
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-30-2009 02:54 AM
тАО01-30-2009 02:54 AM
Re: raw and block device files
Hi,
Have a look at this thread.
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=987277
2. How we can create a vg for raw files only.
create a volume group, create a logical volume without creating the filesystem, change the permissions of the raw logical volume device names to the application owner.
Regards,
Robert-Jan
Have a look at this thread.
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=987277
2. How we can create a vg for raw files only.
create a volume group, create a logical volume without creating the filesystem, change the permissions of the raw logical volume device names to the application owner.
Regards,
Robert-Jan
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-30-2009 03:04 AM
тАО01-30-2009 03:04 AM
Re: raw and block device files
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-30-2009 04:10 AM
тАО01-30-2009 04:10 AM
Re: raw and block device files
Raw devices bypass the buffer cache and use DMA directly to/from the program's I/O buffers; they are normally restricted to full-sector transfers. Using raw devices generally will give you faster performance. Raw devices are used when making new filesystems, when checking unmounted filesystems, or for copying quiescent filesystems. The block devices are used to mount filesystems. Each disk has a block device interface where the system makes the device byte addressable and you can write a single byte in the middle of the disk.
>>2. How we can create a vg for raw files only.<<
Example:-
How to creat raw device !
/usr/sbin/lvcreate -L 500 -n syb_trans_data8 vg_raw
vgname : vg_raw
(do'not create new file system) meaning
step1:- lvcreate -L
step2:- chown oracle:dba /dev/vgxx/rlvolxx
stop. (we have done) please pass on the infor of the raw device file to DBA or App's Team
Thx,
Johnson
>>2. How we can create a vg for raw files only.<<
Example:-
How to creat raw device !
/usr/sbin/lvcreate -L 500 -n syb_trans_data8 vg_raw
vgname : vg_raw
(do'not create new file system) meaning
step1:- lvcreate -L
step2:- chown oracle:dba /dev/vgxx/rlvolxx
stop. (we have done) please pass on the infor of the raw device file to DBA or App's Team
Thx,
Johnson
Problems are common to all, but attitude makes the difference
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP