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RAID-5 WRONG CALCULATION BY SERVER

Roushdy84
Occasional Visitor

RAID-5 WRONG CALCULATION BY SERVER

Hi,

 

Im a new IT admin in my cimpany, and I have a server that already is configured with 8 SAS drives in RAID-5, but they have different sizes, let me tell you the server and storage details:

 

HP Proliant DL380 G5

Eight SAS drives:

3 * 72  GB

4 * 146 GB

1 * 300 GB

 

all drives are configured in a signle RAID-5, the total storage is 478 GB!!!!!!!!!!!!!!!, is that correct?! ... how can i calculate this complicated collection?!, the server hosts ESX 4.1, is this config correct for it?

 

awaiting your kind responses

 

 

P.S. This thread ahs been moved from general  to ProLiant Servers (ML,DL,SL). - Hp Forum moderator

2 REPLIES
Torsten.
Acclaimed Contributor

Re: RAID-5 WRONG CALCULATION BY SERVER

Looks good.

 

RAID 5 for 7 * 72 GB disks are round about the value you get.

 

The smallest disk in the RAID set the limit.


Hope this helps!
Regards
Torsten.

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Mike Texter
Regular Advisor

Re: RAID-5 WRONG CALCULATION BY SERVER

Torsten is right, a RAID-5 array of differently sized disks will only use the size of the smallest disk, on ALL of your disks. Raid-5 means you get only 7 disks worth of usable capacity, your 8th is dedicated for parity.