- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Re: Write in RAID5 disk space
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
тАО11-29-2000 02:25 AM
тАО11-29-2000 02:25 AM
Write in RAID5 disk space
Autoraid reserves a raid 0/1 space for write requests. If this space is full the autoraid copy data from raid 0/1 to raid 5. This action takes a lot of time.
Is it posible to write data direct into RAID5 space?
If possible does it give a better performance?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-29-2000 05:23 AM
тАО11-29-2000 05:23 AM
Re: Write in RAID5 disk space
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-29-2000 07:11 AM
тАО11-29-2000 07:11 AM
Re: Write in RAID5 disk space
My array had 12 18.2-drives in it. I had 4 8-gig filesystems I blew away and restored as a test. The filesystems were backed up using concurrency of 4 on the devices. The restore took 8 hours. Conversely, the same array (now with 8 18.2-gig drives and 4 36-gig drives and a total of 18 8-gigabyte mount points) was completely blown away, the volume groups recreated, and the data restored. This ALSO took 8 hours. I know that the AutoRAID writes directly to RAID5 when it detects a large sequential write, but I don't know what effect the elimination of the data (effectively creating a "well" to dump data into) on the array may have had. I suspect that since the array wasn't empty the first time, it may have been busy moving stuff around while the restores were going on.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-29-2000 07:20 AM
тАО11-29-2000 07:20 AM
Re: Write in RAID5 disk space
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО11-30-2000 12:35 AM
тАО11-30-2000 12:35 AM
Re: Write in RAID5 disk space
For performance reason this make no different because of the Cache in the Diskarray from 96MB. The write performance is the same in the total amount.
The performance has no different because is backup software dependent. Normally the software is designed to make fast backup and slower restore, because we make more backup than restore.
Best regards
Frank