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10-14-2011 11:53 AM
10-14-2011 11:53 AM
p4800 hardware raid question
Hi,
We are implementing a P4800 for a customer, and I have a question about the Hardware raid level.
By default it create 7 raid 5 sets over the 35 disks. Are these sets striped again, so its in reality Hardware RAID 50?
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11-18-2011 10:53 AM
11-18-2011 10:53 AM
Re: p4800 hardware raid question
I'm bumping this up.
I have the same question. How does the RAID work in both the physical and then when you add multiples of these (network RAID).
Lars mentioned that it is setup as 7 Raid 5 sets of 4+1. Can someone confirm that?
If Databases hate RAID 5, then why is HP touting this as having such high IOPS?
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11-18-2011 11:44 AM
11-18-2011 11:44 AM
Re: p4800 hardware raid question
Hi,
There are 2 RAID sets inside a P4xxx environment. On hardware level U have RAID5 (to avoid that specific disk failures will generate performance and availability impact on the network RAID above).
On top of that, the SANiQ software will create network RAID 10 volumes (or 5 or 6) on top of the hardware disks (in RAID5).
Don't worry too much with your databases with the underlying RAID5 since there is RAID10 on top of it... And a lot of RAID controllers with cache...
Kr,
Bart
If my post was useful, clik on my KUDOS! "White Star" !
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11-21-2011 12:14 AM
11-21-2011 12:14 AM
Re: p4800 hardware raid question
On top of that, the SANiQ software will create network RAID 10 volumes (or 5 or 6) on top of the hardware disks (in RAID5).
I doubt that SAN/iQ itself is installed on network RAID 10 volumes.
Remy Zandwijk
VU University Amsterdam
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11-21-2011 12:24 AM
11-21-2011 12:24 AM
Re: p4800 hardware raid question
Hi,
The SANiQ software itself is installed (off course) on the hardware RAID5 volumes on the disks itself...
Kr,
Bart
If my post was useful, clik on my KUDOS! "White Star" !
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11-23-2011 09:36 AM
11-23-2011 09:36 AM
Re: p4800 hardware raid question
Remy Zandwijk
VU University Amsterdam