You have a new 2-node FAS8700 ONTAP 9.8 cluster. One of the nodes has 24x16 TB NL-SAS disks assigned and available for a new aggregate. You created the aggregate with one RAID group and two spare disks.
In this scenario, how many data drives are in the aggregate?
To determine the number of data drives in the new aggregate, we need to account for the number of spare and parity disks given the type of RAID used. In this scenario, the drives are NL-SAS 16TB, which only supports RAID-TEC. RAID-TEC requires three parity disks. Out of the 24 available disks, you have two designated as spare disks, leaving 22 disks to be used in the aggregate. From these 22 disks, three are used as parity disks, leaving 19 disks available for data storage. Thus, the number of data drives in the aggregate is 19.
Should be D. After Ontap 9 , disk larger than 6TB and more than 7 drives are required to use RAID-tec ,which contains 3 parities https://docs.netapp.com/us-en/ontap/disks-aggregates/default-raid-policies-aggregates-concept.html
NL-SAS 16TB only supports RAID-TEC, so 24 disck - 3 Parity - 2 Spare = 19 Data disk
Thank you for your kind response. I understand now.
raiddp 2 disk ,raidtec 3 disks as parity. since its 16tb , it will use 3 parity disks. 24-2=22 disks used 22-3=19 data disks
16TB can only use RAID-TEC which uses 3 parity disks. 24 Disks - 2 Spares - 3 Parity = 19 data disks
Should be B The FAS8700 NL-SAS 16TB only supports RAID-TEC. The minimum number of RAID-TEC is 7. 24-7=17. https://hwu.netapp.com/Home/Index
Should be B The FAS8700 NL-SAS 16TB only supports RAID-TEC. The minimum number of RAID-TEC is 7. 24-7=17. https://hwu.netapp.com/Home/Index