raid question 6 UCS 210

Hi all

We have a UCS 210 with a LSI MegaRAID 9261 - 8i 6G card.  There also have 4x146GB 6 GB SAS 15 K RPM HDD SFF.  It is configured with raid 6 with all 4 HDD in the virtual HD group.  It seems he gives me about 278 GB.  about half 4 x 146.  does that make sense for raid 6?

We have an another c220 with with raid 5 gives approximately 1.4 to 6x300HD.  (more than half).  RAID 5 is almost identical to raid 6 and gives less than raid 5 in size.  This is why it makes no sense for ucs210 with disk HARD 4 x 146.

If anyone can clarify this?

very much appreciated.

Thank you

Vijay

Hi Vsaravanamuthu,

The values you get are expected, what you need to know is that for raid 5 you have a failure of the SINGLE player for the fault tolerance and RAID 6, you have TWO disks for fault tolerance. It would make sense that you see more large capacity of raid 5 to raid 6.   You can also find calculators of raid online that will give you and idea of the expected capacity of the raid volume (see below).

RAID calculator

http://wintelguy.com/raidcalc.pl

I would like to know if this helps and don't forget to note the answers useful.

Tags: Cisco DataCenter

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