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September 27th, 2012 11:00
Useable Disk Space
Hello all,
I just dropped in a new DAE fully populated with 15 2TB SATA drives, using RAID 5 and 1 hot spare. After creating LUNS with all the disk space available, I only got 14 Terabytes of useable Storage. Does that seem right? Each disk is actulllay 1834.35 GB each after the RAID.
Seems like I'm losing alot of storage somewhere. So with 30 TB's I only get 14 TB's after overhead?
Can someone confirm that is correct? Or am I missing something.
Thanks for the great help on this site.
see attached
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dynamox
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September 27th, 2012 13:00
looks correct to me
dynamox
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September 27th, 2012 11:00
how many raid groups and how many disks per raid group ?
STAI
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September 27th, 2012 13:00
I attached the RAID group configuration. See attached.
There are 2 RAID Groups, with 5 disks per Raid group... I can see 4 free disks though...
AnkitMehta
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September 27th, 2012 13:00
You have 4+1 Configuration with RAID Type 5.
And yes, 14674.8 GB (approx) of useable Storage seems just about right with the Current RAID Group Configuration.
I am not quite sure, why you have Enc5 Dsk0 to 3 Empty?! Was left purposely?
STAI
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September 27th, 2012 13:00
Thank you !!!
Michael (Mickey) Agee
DEA 391, S.T.A.I.
Office: 703.495.6800
BB: 571-220-3180
STAI
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September 27th, 2012 13:00
Also I have 1 hot spare
RRR
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October 9th, 2012 02:00
By the way: there's a difference in Gigabyte and binary Gigabyte, also known as GiB. Since the year 2000 the additional "i" is used to differentiate GB from GiB. I understand it's just 12 years, so you're forgiven
A 2 TB disk does NOT hold 2x1024x1024x1024x1024 Bytes!!! But 2 TB = 2,000,000,000,000 Bytes!
So 2 TB = 2,000,000,000,000 / 1024/1024/1024/1024 = 1.819 TiB