https://community.hpe.com/t5/disk-enclosures/raid-adg-stripe-size/m-p/3616081#M17416 I would like to know why to use RAID ADG instead of RAID 5 with spare. To prevent two exactly simultaneous disk failures?<BR /><BR />I prefer RAID 5 with spare for performance.<BR /><BR />The stripe size depends of the data type to be stored on the disk.<BR /><BR />A large chunk size (relative to the average request size) increases the request rate<BR />by enabling multiple disk drives to respond to multiple requests.<BR /><BR />Large chunk sizes also tend to increase the performance of random reads and<BR />writes. HP recommends that you use a chunk size of 10 to 20 times the average<BR />request size, rounded to the closest prime number. RAID 5 sets intended for high<BR />data rate performance should use a relatively large number<BR /><BR />RAID 0 and RAID 0+1 sets intended for high data transfer rates should use a<BR />relatively low chunk size. If you have mostly sequential reads or writes (like those needed to work with<BR />large graphic files), make the chunk size for RAID 0 and RAID 0+1 a small<BR />number.<BR /><BR /> Wed, 31 Aug 2005 15:25:24 GMT Ivan Ferreira 2005-08-31T15:25:24Z https://community.hpe.com/t5/disk-enclosures/raid-adg-stripe-size/m-p/3616080#M17415 What is the optimal stripe size using RAID ADG on MSA 500 G2 Disk Array? Wed, 31 Aug 2005 14:46:33 GMT https://community.hpe.com/t5/disk-enclosures/raid-adg-stripe-size/m-p/3616080#M17415 Luke LaFebre_1 2005-08-31T14:46:33Z https://community.hpe.com/t5/disk-enclosures/raid-adg-stripe-size/m-p/3616081#M17416 I would like to know why to use RAID ADG instead of RAID 5 with spare. To prevent two exactly simultaneous disk failures?<BR /><BR />I prefer RAID 5 with spare for performance.<BR /><BR />The stripe size depends of the data type to be stored on the disk.<BR /><BR />A large chunk size (relative to the average request size) increases the request rate<BR />by enabling multiple disk drives to respond to multiple requests.<BR /><BR />Large chunk sizes also tend to increase the performance of random reads and<BR />writes. HP recommends that you use a chunk size of 10 to 20 times the average<BR />request size, rounded to the closest prime number. RAID 5 sets intended for high<BR />data rate performance should use a relatively large number<BR /><BR />RAID 0 and RAID 0+1 sets intended for high data transfer rates should use a<BR />relatively low chunk size. If you have mostly sequential reads or writes (like those needed to work with<BR />large graphic files), make the chunk size for RAID 0 and RAID 0+1 a small<BR />number.<BR /><BR /> Wed, 31 Aug 2005 15:25:24 GMT https://community.hpe.com/t5/disk-enclosures/raid-adg-stripe-size/m-p/3616081#M17416 Ivan Ferreira 2005-08-31T15:25:24Z