- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- Re: Question about the disk space on mirrored vg00
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
тАО07-02-2009 06:06 AM
тАО07-02-2009 06:06 AM
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-02-2009 06:13 AM
тАО07-02-2009 06:13 AM
SolutionSo if you have 100 physical extents free in a VG, and you want to mirror whatever LV uses those free extents, you will only be able to create 50 mirrored logical extents (assuming the free PEs are equally distributed across ane even number of disks in the VG.
So simple answer - if you have 100 PEs free in your VG, you can only create a mirrored LV of 50 extents
HTH
Duncan
I am an HPE Employee
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-02-2009 06:21 AM
тАО07-02-2009 06:21 AM
Re: Question about the disk space on mirrored vg00
Answer is NO. Whatever the free extends available is the actual free space.
You should not confuse these free extends with mirror.
Free PE show's by vgdisplay is the total free PE's in that VG.
Free PE show's by pvdisplay is the total free PE's in that PV.
If you are creating non-mirrored lv, you can use the full space. if you are creating mirrored lv, you can use maximum of half of the space.
Ganesh.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-02-2009 06:00 PM
тАО07-02-2009 06:00 PM
Re: Question about the disk space on mirrored vg00
If your vgdisplay is showing 100 Free PE,you have 100 PE to create a new non-mirrored Logical volume however you have only 50 free PE to extend/create a mirrored logical volume.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-02-2009 09:17 PM
тАО07-02-2009 09:17 PM
Re: Question about the disk space on mirrored vg00
Does the free space as given by free extents on a mirrored disk is double the original space?
No - Free space what ever given is correct and you can use that.If it is showing 100 PE free in Vgdisplay you can create a new LV with 100 PE
BUT
If you are extending size of an already existing mirrord LV, It will use double sapce ( for extending 1 PE it will take 1 PE from each disk = 2 PE)
That case if you ask
In order to calculate the real space we need to make it half. Is it true?
YES.
Regards,
Sooraj U
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-02-2009 09:20 PM
тАО07-02-2009 09:20 PM
Re: Question about the disk space on mirrored vg00
Still if the mirror policy is wrong and if it is non-strict( by mistake), it will take double space from same disk itself. This is a rare case.
regards,
Sooraj
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-03-2009 06:24 PM
тАО07-03-2009 06:24 PM
Re: Question about the disk space on mirrored vg00
What Ganesan said absolutely right!
Already Mirrored root vg00 has free face(free PE).we can you all free PE to create new LV.
available free PE-100 and PE size-4MB then available free space in VG 400MB.
So we can create 400MB a new LV.
If you want to mirror the new LV then create new LV in root disk and mirror to another disk in same VG.(only use 50PE.
I hope you got the logic.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО07-03-2009 10:04 PM
тАО07-03-2009 10:04 PM