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July 12th, 2012 09:00
Control stations - VNX 7500
hi guys.
i am new to this vnx7500 which we are getting so my questions might be silly we are getting this vnx as part of vblock300 HX.
whats the purpose of control stations in vnx 7500 ? if we are going to use the vnx for only block ( LUNs )and nfs content still we need this control stations to be configured ?
we have 3 types of disk in this , SAS , NL SAS and flash so can we create a pool with mixtures of these drives or we have to create pool for each disk type ?
raid groups can be spread across multiple DAEs ?
appreciate your help
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Raj_la
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July 12th, 2012 09:00
hi vipin & rainer thank you for your inputs.
i understand to use full adv of FAST VP we have to have mixture drive types in pool.
yes NFS shares , so if we want to use few nfs shares do we need control stations to be configured ?
curios, what kind of monitoring monitoring & reporting we do with this control stations ( i really waiting this to be impleted in my env
)
how about pool Raid type , let say we have 10 SAS and 10 Flash so all we need to create pool of raid 5 type and include these 10 disks into pool then pool will take care of protection or we have to create a raid 5 ( 2 for SAS and 2 for flash ) out of these disks and include those in a pool ?
Rainer_EMC
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July 12th, 2012 09:00
The control station needs to be configured in any case
Rainer_EMC
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July 12th, 2012 09:00
You just create the pool and add drives to it – the creation of the internal (private) raidgroups is automatic
Rainer_EMC
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July 12th, 2012 09:00
If you bought a VNX Unified model with a control station then the control station needs to be configured no matter whether you are using file (NAS) or just for block (SAN)
I will do some of the monitoring & reporting and also be used for administration
Yes you can mix different drive type in a pool.
Currently they would have to be the same RAID level – but if you wait a week or two then this will change with a new OS version
Yes RG’s can span DAE’s
In fact if you use pools you no longer worry about that.
I suggest to look at some older threads here and some while papers to get to know the difference between traditional raidgroups and pool based provisioning
dynamox
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July 12th, 2012 09:00
take a look at white papers i linked in this thread
https://community.emc.com/thread/146753?tstart=0
Vipin VK
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July 12th, 2012 09:00
Control stations are for monitoring and managing the file components of the VNX.
Here we have to know clearly what application you will be running on the VNX and also how this will be going to be used.
The flash drives came may be intended for FAST Cache or it may be used in pools if you want to take advantage of FAST VP. If you will be implementing FAST VP, you must be going for a mixture of the drive types to take the full advantage (should have enough number of drives in each type also).
Let me know one thing, by NFS content you mean NFS shares ?
Configuring RAID Groups again, if you are going for traditional RG and LUNs this again depends on the application here.
If you have powerlink (https://powerlink.emc.com) account, you can access a wide range of white papers which describes Raid Group best practices, FAST, Storage pools etc...
Raj_la
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July 12th, 2012 10:00
one last question: how the hot spare is it one of the disk in that storage pool as well ? or do we need to specifiy somewhere to use one kind of disk a hot spare
dynamox
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July 12th, 2012 10:00
it's not part of the pool, it's a raid group type hot spare
RRR
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July 13th, 2012 01:00
A hot spare is always global, so it's a hot spare for failed pool disks as well as failed regular raid group disks.