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тАО06-05-2012 04:23 AM
тАО06-05-2012 04:23 AM
Hi Guys,
I have the following question - with the Smart Array P800 it┬┤s possible to connect 8 Disk-Enclosures - every with 12 disks and with the 8 drives from the internal backplane, I will get the maximum auf 104 drives - so I wanted to know, if there is a limitation of the drives count, when I create an array ? - or is it unlimited so that I can create an array with 96 or 104 drives ???? I know, HP recommended a maximum of 14 disks per Array, when you use Raid5.
Thanks in advance four your help!
Solved! Go to Solution.
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тАО06-05-2012 05:24 AM - edited тАО06-05-2012 05:26 AM
тАО06-05-2012 05:24 AM - edited тАО06-05-2012 05:26 AM
Solutionhttp://h18004.www1.hp.com/products/quickspecs/12616_div/12616_div.html
Capacity
Given the increasing need for high performance and rapid capacity expansion, the SA-P800 offers:
- Up to 12TB of external storage per PCI slot with 4 HP 50 Modular Smart Array enclosures and 40 x 300GB SFF SAS hard drives.
- Up to 57.6 TB of external storage per PCI slot with 8 HP 60 Modular Smart Array enclosures and 96 x 600GB 3.5" SAS hard drives
- Up to 96 TB of external storage per PCI slot with 8 HP 60 Modular Smart Array enclosures and 96 x 1TB 3.5" SATA MDL hard drives
- Up to 30 TB of external storage per PCI slot with 4 HP 70 Modular Smart Array enclosures and 100 x 300GB SFF SAS hard drives
- Up to 25 TB of external storage per PCI slot with 4 HP 70 Modular Smart Array enclosures and 100 x 250GB SFF SATA ETY hard drives
NOTE: Support for greater than 2TB in a single logical drive.
Maximum Capacity 108TB (108 x 1TB SATA 3.5" MDL HDD)
Logical Drives SupportedUp to 32 logical drives
I cannot think of a time when I have passed 24 drives. (too cautious about multi drive failure in a large array vs. the time to rebuild a drive)
When I look at the tech whitepaper, HP says no more than 56 drives in RAID 6:
RAID 6
RAID 6 protects against failure of any two drives. It requires a minimum of four drives, but only two are available for data. RAID 6 can tolerate multiple simultaneous drive failures without downtime or data loss. It is ideal for applications requiring large logical volumes, because it can safely protect a single volume of up to 56 disk drives. RAID 6 also offers lower implementation costs and greater usable capacity per U than RAID 1.
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c00687518/c00687518.pdf
Thinking of the potential for multi drive fails once this system goes into production, all the drives MTBF will generally begin to come due all around the same time...
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тАО06-05-2012 08:48 AM
тАО06-05-2012 08:48 AM