- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- disk array questions
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
тАО05-13-2003 11:54 AM
тАО05-13-2003 11:54 AM
Thanks for any help.
--- Disk space usage --------------------
1. Total physical = 156298 MB *
2. Allocated to LUNs = 110562 MB *
3. Used as Active Hot spare = 17366 MB *
4. Used by non-included disks = 0 MB *
5. Used for Redundancy = 28370 MB *
6. Unallocated (avail for LUNs) = 0 MB *
-----------------------------------------
Solved! Go to Solution.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-13-2003 12:06 PM
тАО05-13-2003 12:06 PM
Re: disk array questions
The "Used for redundancy" is the parity information which is needed to recteate the information in case of a disk failure. This information takes some of the useable disk space. If you add the Allocated and the active hot spare (the useabel space) and compare with the total there is some GB missing. This is the Redundancey.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-13-2003 12:07 PM
тАО05-13-2003 12:07 PM
Re: disk array questions
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-13-2003 01:41 PM
тАО05-13-2003 01:41 PM
Re: disk array questions
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-13-2003 01:58 PM
тАО05-13-2003 01:58 PM
Re: disk array questions
Unfortunately, you have made the classic mistake for AutoRAIDS and allocated all the space for LUN's. For best performance, no more than around 50% of the capacity should be allocated. The arrtay will then run in RAID 1/0 at all times. You at least have active hot spare enabled so that that space is used for additional 1/0 space. In your configuration, about 10% (the most recently used) data is kept in RAID 1/0 while the remainder is RAID5 - with considerably more overlead and thus less performance.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-14-2003 04:09 AM
тАО05-14-2003 04:09 AM
Re: disk array questions
This value is going to change the more you use the array (the more data is on it that is) The data is duplicated (mirrored) in a R1/0 style, which has good perf for RAID, but poor disk efficiency (doubled data), Raid 5 is a comprimise on disk efficiency versus performance. It is a parity based raid and thus requires controllers to calculate (resulting in slower io)
The autoraid decides which data goes in which raid level. It is nice you use the Active Hot Spare, this is used to store in R1/0, if you really need more space you can disactivate HS and use it as LUN capacity.. with the detriment of course of performance.....
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-14-2003 11:01 AM
тАО05-14-2003 11:01 AM
Re: disk array questions
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-15-2003 11:47 AM
тАО05-15-2003 11:47 AM
Re: disk array questions
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-15-2003 11:51 AM
тАО05-15-2003 11:51 AM
Re: disk array questions
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО05-15-2003 11:54 AM
тАО05-15-2003 11:54 AM
Re: disk array questions
What can i do to speed things up with?