https://community.hpe.com/t5/disk-enclosures/msa1500-raid-size-question/m-p/3948300#M22964 Gary,<BR /><BR />The 14HDD single array should be faster than the 2x7HDD array, due to the data being stripped across more disks.<BR /><BR />I do remember reading something somewhere that said never use more than 14HDD in a single RAID5 array, I guess because the chance of 2 failed drives is more probable.<BR /><BR />I assuming your customer doesn't want any online spares e.t.c at all in the array with this config....since there isn't room for any.<BR /><BR />Hope this helps,<BR /><BR />Jeff<BR /><BR />P.S If you go for the 14HDD option, I'd set the rebuild priority to HIGH on the controller....just in case. Tue, 20 Feb 2007 19:37:24 GMT Jefferson Humber 2007-02-20T19:37:24Z https://community.hpe.com/t5/disk-enclosures/msa1500-raid-size-question/m-p/3948299#M22963 I have a customer that wants to create a 14 drive RAID5 set for user data. We are about to recommend they split and make 2 7 drive Raid5. We are doing this for performance reasons but I can not find documentation to back this - so are we worried about nothing? Tue, 20 Feb 2007 16:51:47 GMT https://community.hpe.com/t5/disk-enclosures/msa1500-raid-size-question/m-p/3948299#M22963 Gary crews 2007-02-20T16:51:47Z https://community.hpe.com/t5/disk-enclosures/msa1500-raid-size-question/m-p/3948300#M22964 Gary,<BR /><BR />The 14HDD single array should be faster than the 2x7HDD array, due to the data being stripped across more disks.<BR /><BR />I do remember reading something somewhere that said never use more than 14HDD in a single RAID5 array, I guess because the chance of 2 failed drives is more probable.<BR /><BR />I assuming your customer doesn't want any online spares e.t.c at all in the array with this config....since there isn't room for any.<BR /><BR />Hope this helps,<BR /><BR />Jeff<BR /><BR />P.S If you go for the 14HDD option, I'd set the rebuild priority to HIGH on the controller....just in case. Tue, 20 Feb 2007 19:37:24 GMT https://community.hpe.com/t5/disk-enclosures/msa1500-raid-size-question/m-p/3948300#M22964 Jefferson Humber 2007-02-20T19:37:24Z