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Kashem
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Nov 12, 2008 04:46:45 GMT
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Hi,
Would you mind informing me which eva (4400/6100/8100) support RAID 6.
Regards,
Kashem
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Uwe Zessin
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Nov 12, 2008 05:41:22 GMT
8 pts
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Today, there is no RAID6 support. |
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Khalique
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Nov 17, 2008 10:00:16 GMT
Unassigned
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VRAID 0, 1 ,5 and cross Vraid snap is supported on EVA. VRAID 6 support is not available yet. |
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IBaltay
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Nov 17, 2008 10:07:36 GMT
Unassigned
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Hi,
RAID6 is the less powerfull from all parity RAIDs. It is used in the XPs but the penalty of the double parity write is not ideal for the on-performance oriented design. |
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Uwe Zessin
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Nov 17, 2008 10:29:07 GMT
Unassigned
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But some customers are interested in safety. This is very important for less-reliable, high-capacity disk drives. I know one IT manager who declared: "I won't buy any storage array that can't do RAID-6. Period.". |
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IBaltay
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Nov 17, 2008 10:34:31 GMT
Unassigned
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From this strict customer request we can come to the conclusion that MSA 1000/1500 with ADG (RAID6) is safer then EVA which is a nice paradox :-) |
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Uwe Zessin
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Nov 17, 2008 10:53:12 GMT
Unassigned
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I agree ;-)
But I don't/did not sell MSA1500cs/MSA20 combinations anyway. |
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sreekanthtm
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Nov 17, 2008 11:05:30 GMT
Unassigned
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Hi,
Everybody says RAID 6 is not supported.... Why?
RAID-6
Striped data with dual distributed parity
RAID-6 is the same as RAID-5 except that it uses a second level of independently calculated and distributed parity information for additional fault tolerance. This extra fault tolerance provides data
security in the event two drives fail before a drive can be replaced.
While this RAID level does provide greater fault tolerance than level 5, there is a significant loss in
write performance due to the requirement for storing parity twice for each write operation. A RAID-
6 configuration also requires N+2 drives to accommodate the additional parity data, which makes it
less cost effective than RAID-5 for an equivalent storage capacity.
Its just a copy paste ferom the attchmnt... :-)
Rgds
Sreekanth |
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Uwe Zessin
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Nov 17, 2008 11:12:30 GMT
Unassigned
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Sreekanth,
the question in this thread is whether a certain set of HP EVA storage arrays provide support for RAID-6 [=have implemented it], not what RAID-6 is or wether some other arrays have it. |
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sreekanthtm
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Nov 17, 2008 11:15:13 GMT
Unassigned
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Its already answered in the first line ( by you) All other comments are just value add....Let him understand why its not supported? and why others are not worried about it.
Rgds
Sreekanth |
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Uwe Zessin
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Nov 17, 2008 11:31:33 GMT
Unassigned
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In this context, 'not supported' means that no currently sold EVA has *implemented* RAID-6. The EVA simply *CAN'T DO* RAID-6.
It DOES NOT mean that the controller firmware could do it, but somebody at HP says: "don't use it / if you use it but have problems - don't call us, because we will not help (support) you". |
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Santhosh D
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Feb 19, 2009 05:09:19 GMT
Unassigned
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Hi..
Good News to you!!
By March end, HP is releasing a new product series in EVA i.e EVA 6400/8400 and this product line supports RAID 6
Cheers! |
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