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тАО05-08-2006 10:57 AM
тАО05-08-2006 10:57 AM
Hi,
First time poster.
I've recently become responsible for an N-Class system that has 2 va7400 enclosures in it.
Each one has the max 15 disks, 73G each.
First question: How can I find out how much actual storage is available from each disk? Parity and metadata eat up some space, and I'm just wondering how to determine the amount.
Second question: I ran cvui to look at see how much space is available for LUNs. It shows me the following output:
Redundancy Group = 1
Unallocated (Available for LUNs) = 327.748 GB
Redundancy Group = 2
Unallocated (Available for LUNs) = 336.134 GB
Does this show the free (non-LUN) space for each enclosure?
Thanks for your help with what I'm sure will be lots of questions.
I am currently badgering my boss to approve the Storageworks Class and SAN class so I can get a little more familiar with all of this.
First time poster.
I've recently become responsible for an N-Class system that has 2 va7400 enclosures in it.
Each one has the max 15 disks, 73G each.
First question: How can I find out how much actual storage is available from each disk? Parity and metadata eat up some space, and I'm just wondering how to determine the amount.
Second question: I ran cvui to look at see how much space is available for LUNs. It shows me the following output:
Redundancy Group = 1
Unallocated (Available for LUNs) = 327.748 GB
Redundancy Group = 2
Unallocated (Available for LUNs) = 336.134 GB
Does this show the free (non-LUN) space for each enclosure?
Thanks for your help with what I'm sure will be lots of questions.
I am currently badgering my boss to approve the Storageworks Class and SAN class so I can get a little more familiar with all of this.
Solved! Go to Solution.
3 REPLIES 3
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тАО05-08-2006 05:52 PM
тАО05-08-2006 05:52 PM
Re: CVUI - Available space for LUNs
Rob,
In a VA7400 al the data is striped over the disks (RAID0+1 or Autoraid,depends on the settings) So it is not relevant to speak about free space on each disk. You have to check at the free disk space.
A VA7400 has two redundancy group (disk groups). In the first RG you have 327 GB free and in the second you have 336 GB free.
In a VA7400 al the data is striped over the disks (RAID0+1 or Autoraid,depends on the settings) So it is not relevant to speak about free space on each disk. You have to check at the free disk space.
A VA7400 has two redundancy group (disk groups). In the first RG you have 327 GB free and in the second you have 336 GB free.
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тАО05-09-2006 06:13 AM
тАО05-09-2006 06:13 AM
Re: CVUI - Available space for LUNs
Luk,
Thanks for your reply. I guess what I'm trying to ask is, if I add a 36GB disk to my array, how can I determine how much is usable.
Also, I'm still a little hazy on the redundancy grou thing. Is that a logical partition of the drives in the two enclosures?
Thanks for your reply. I guess what I'm trying to ask is, if I add a 36GB disk to my array, how can I determine how much is usable.
Also, I'm still a little hazy on the redundancy grou thing. Is that a logical partition of the drives in the two enclosures?
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тАО05-09-2006 07:22 AM
тАО05-09-2006 07:22 AM
Solution
The VA74x0 has 2 redundancy groups - that means 2 internal busses. One bus are the odd numbered drives and one controller, the other group are the even drives and the other controller - mainly for performance reasons.
See the attached document.
Expect around 75% percent capacity of a disk to use, this depends of a lot of internal settings, e.g. number of hotspare drives.
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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See the attached document.
Expect around 75% percent capacity of a disk to use, this depends of a lot of internal settings, e.g. number of hotspare drives.
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
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