- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- VA7100 in RAID 5 disc space management
Disk Enclosures
1753768
Members
5246
Online
108799
Solutions
Forums
Categories
Company
Local Language
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
Discussions
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
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
04-27-2004 09:11 PM
04-27-2004 09:11 PM
VA7100 in RAID 5 disc space management
We have a system with a VA7100 in RAID 5 (with 5 disc of 18Go Each, one
of which is in Hot stare) normally it remain to us 54Go (3 discs) for
data storage but we have only 30Go of free space. Iâ d like to ask the following questions :
1- In general on a system of this type (VA7100 in RAID 5 with 5 discs installed) which percentage of disk space is reserved by VA. There is a means to reduce this percentage ?
2 - To add new disc with VA in RAID 5 how to make, without disturbing the system and the
data which already exists.
3- If we decide to add new discs, the proportionality would remain the
same one (almost 50% of space available is reserved by VA7100 for its
own use) ?.
tha
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-27-2004 11:14 PM
04-27-2004 11:14 PM
Re: VA7100 in RAID 5 disc space management
Sidi,
the VA7100 does not use RAID5. You can select (but not switch to and back) RAID 0/1 and AUTORAID mode. Usually you use autoraid.
This means that if necessary data is moved from RAID 0/1 to RAID5DP to fully use the capacity.
Hot spare mode can be set to automatic, largest disk or largest 2 disks. Usually you use largest disk. The VA uses "active hot spare", i.e. it reserves some space on *all* disks to compensate the possible failure of the largest disk.
Also it *always* keeps the 10 percent top used data in RAID 0/1.
That is why it is difficult to exactly estimate what net capacity will be available with so and so many xGB disks.
Hope the above covers Q1.
Q3: Concluding from the above, your percentage of available net space will somewhat improve when you add more disks (however if you add only *one* larger disk it will go down because of hot spare mode "largest disk"....)
Q2: you can add disks online without taking the VA or any host down. Recommendations *before* you add disks are:
make sure everything is in "good" state (armdsp -a); if newer controller firmware is available upgrade controller fw first; if possible add same size disks; upgrade firmware of existing disks if newer version is available.
Regards,
Bernhard
the VA7100 does not use RAID5. You can select (but not switch to and back) RAID 0/1 and AUTORAID mode. Usually you use autoraid.
This means that if necessary data is moved from RAID 0/1 to RAID5DP to fully use the capacity.
Hot spare mode can be set to automatic, largest disk or largest 2 disks. Usually you use largest disk. The VA uses "active hot spare", i.e. it reserves some space on *all* disks to compensate the possible failure of the largest disk.
Also it *always* keeps the 10 percent top used data in RAID 0/1.
That is why it is difficult to exactly estimate what net capacity will be available with so and so many xGB disks.
Hope the above covers Q1.
Q3: Concluding from the above, your percentage of available net space will somewhat improve when you add more disks (however if you add only *one* larger disk it will go down because of hot spare mode "largest disk"....)
Q2: you can add disks online without taking the VA or any host down. Recommendations *before* you add disks are:
make sure everything is in "good" state (armdsp -a); if newer controller firmware is available upgrade controller fw first; if possible add same size disks; upgrade firmware of existing disks if newer version is available.
Regards,
Bernhard
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
04-28-2004 12:47 AM
04-28-2004 12:47 AM
Re: VA7100 in RAID 5 disc space management
thank you for your response Bernhard.
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