- Community Home
- >
- Storage
- >
- Entry Storage Systems
- >
- Disk Enclosures
- >
- Re: How many disks to group at one time on EVA
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
тАО09-27-2005 01:22 AM
тАО09-27-2005 01:22 AM
How many disks to group at one time on EVA
Thanks
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-27-2005 01:43 AM
тАО09-27-2005 01:43 AM
Re: How many disks to group at one time on EVA
The minimum you can group is 8. So at the very least, you can have multiple disk groups with 8 disks apiece.
HP best practice is to place as many disks in 1 group as possible. I have the doc somewhere, but the link is not handy. When I find, I will post, or someone will post.
Some of the reasons for this is because you get better performance when there are more disks handling your data, you also have the highest available disk space with one disk group.
Best practice also says to add disks in increments of 8. This is partly due to how the EVA handles redundancy, which is a whole other conversation. (which we can get into if needed).
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-27-2005 01:56 AM
тАО09-27-2005 01:56 AM
Re: How many disks to group at one time on EVA
see following best practice doc:
http://h200001.www2.hp.com/bc/docs/support/SupportManual/lpg29448/lpg29448.pdf
Page 18.
I have to say that some recommendations seem to me a little bit strange, but on the other hand this is official doc on HP site.
regards,
M.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-27-2005 05:46 AM
тАО09-27-2005 05:46 AM
Re: How many disks to group at one time on EVA
My understanding is that they mean to enhance a disk group by a multiple of 8 disk drives. So if one needs to add capacity to a disk group, one 'should' add, e.g. 16 disks, not 14. In that case I would add all 16 disks to the group, not the first 8 and after leveling the other 8.
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-27-2005 06:14 AM
тАО09-27-2005 06:14 AM
Re: How many disks to group at one time on EVA
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-28-2005 02:20 AM
тАО09-28-2005 02:20 AM
Re: How many disks to group at one time on EVA
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-28-2005 02:39 AM
тАО09-28-2005 02:39 AM
Re: How many disks to group at one time on EVA
8 disks
16 disks
24 disks
32 disks
40 disks
etc...
you make the controllers job easier when it comes to allocating RSS groups, which is done transparently by the controllers.
If you had to add 32 disks to a DG, you do NOT have to add 8, wait for it to level, add the next 8, wait for it to level, add the next 8, level, add the final 8 and level. It is ok to add all 32 at once.
Additionally, if you only needed 1.5TB ( 5 300GB disks), you shouldn't just add the 5 disks... you should add 8 disks. A bit more costly, but better in the long run.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-28-2005 02:50 AM
тАО09-28-2005 02:50 AM
Re: How many disks to group at one time on EVA
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-28-2005 02:56 AM
тАО09-28-2005 02:56 AM
Re: How many disks to group at one time on EVA
Assume your DG is 16 Disks big, your RSS groups should be 2 sets of 8. If you add 8 disks, you get a new RSS group of 8.
If you add 4 disks, you will end up with potentially 2 groups of 10 or perhaps 1 group of 8 and 2 groups of 6.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО09-28-2005 03:09 AM
тАО09-28-2005 03:09 AM
Re: How many disks to group at one time on EVA
And I have seen those small environments.
No: MSA is not the answer!