how to setup netapp FAS2020 to maximize diskspace

This unit has 12- 500GB SATA drives. I am using it for backup only. The data will then go to tape. I want to fully utilize as much of this 6 TB as possible. Idealy i would get 11 drives in one RAID4 array (losing only one disk for parity), and keep one as hot spare. That would give me
10 500GB disks to work with. Any suggestions from the NetApp experts? Thanks in advance.
rofelsohnAsked:
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Paul SolovyovskyConnect With a Mentor Senior IT AdvisorCommented:
I would do 7.3.3, has many bug fixes.  
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Paul SolovyovskySenior IT AdvisorCommented:
Raid 4 will definitly give you more space on drives, and with a single spare will give you some more.

Make sure you configure your volumes with ASIS and Dedupe, this will make better use of your storage.  

keep in mind that 500GB is marketing so you'll end up getting a little less usable.  probably net 9 disk
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rofelsohnAuthor Commented:
That is exacty the scenario that i want. But how to do it?
Currenty i have 1 aggragate with the sys vol  on it in a RAID DP (3 DISK). I am just now trying to add the remaining 9 disks but it would only accept 7. Disks are now zeroing. Almost done. But i want to have only one RAID4 if possilbe with all but 1 disk. Is is possible to change from DP to RAID4? Do i need to format all disks and reinstall?
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rofelsohnAuthor Commented:
ASIS and Dedupe, these are 3rd party tools?
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Paul SolovyovskySenior IT AdvisorCommented:
ASIS is a license.  You'll need to ensure that deduplication is checked on the volumes that you create.  What type of volumes are you using, NFS, LUNs, CIFS?
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rofelsohnAuthor Commented:
I want to create iSCSI LUNS?
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Paul SolovyovskySenior IT AdvisorCommented:
Depends what you want to do.  If you're doing backups you may want to and you have CIFS you can use that for instance.

If you want to use iSCSI LUNs you should dedupe using ASIS,  you'll find the URL below very helpfull


http://blog.scottlowe.org/2008/04/24/using-netapp-deduplication-with-block-storage/
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rofelsohnAuthor Commented:
OK, thank you for that. Now re: the first part. How can i change my RAID DP TO RAID4?
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Paul SolovyovskySenior IT AdvisorCommented:
You'll need to wipe the OS and reinstall the Netapp since it has rewrite all the data.
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Paul SolovyovskySenior IT AdvisorCommented:
If the you're using the same aggregate as the data as vol0
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rofelsohnAuthor Commented:
Yes, that is my plan, exactly.
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Paul SolovyovskySenior IT AdvisorCommented:
You'll need to do a full re-install then, I don't believe there is a way to migrate raid
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rofelsohnAuthor Commented:
Best method for this is to issue commands to reset to factory default? Or is there another way?
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Paul SolovyovskySenior IT AdvisorCommented:
You'll have to blow away the aggr.  Backup etc$ (put the netapp into a workgroup and connect via CIFS)
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rofelsohnAuthor Commented:
Sorry but,
won't let me destroy aggr0 because it it online.
wont' let me make it offiline because it contains a flex volume.
won't let me destroy vol0 because it is online.
won't let me offline the vol0 because offlining root volume is not allowed.
???
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rofelsohnAuthor Commented:
Can i just use:
priv set advanced
halt -c factory
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Paul SolovyovskySenior IT AdvisorCommented:
always set it from scratch, not sure if factory is raid4
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rofelsohnAuthor Commented:
Used CTRL C for special menu
Used option 4 to create RAID4 with traditional volume. Option 4A would have made RAID DP with flex volume.
Disks are zeroing again so i am leaving for the day now. I will start again in the morning.
Thanks for the response. Always appreciate any further thoughts.
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Paul SolovyovskySenior IT AdvisorCommented:
Yep..it will take awhile for the disks to zero out
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rofelsohnAuthor Commented:
I blew it.
Getting errors like cannot read various dirs in etc not available. i may have accidentally blown away the /etc folder. also java in not eabled so i can't use Filer View. Any thoughts?
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Paul SolovyovskySenior IT AdvisorCommented:
From boot recreate vol0 and setup RAID4 from scratch
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rofelsohnAuthor Commented:
Can't seem to do this. Credentials are lost. Setup incomplete. I think i need new OS download perhaps upgrade. Currently using ONTAP ver. 7.3.1.1
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rofelsohnAuthor Commented:
Finally solved my issues with an OS upgrade.
 (OTAP 7.3.4)
Thanks for sticking with me through the mess.
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Paul SolovyovskySenior IT AdvisorCommented:
Didn't realize that 7.3.4 was out since they're deploying ONtap 8 these days.  Good to hear things worked out
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