An administrator is asked to create a Dynamic Disk Pools (DDP) pool from eleven 12 TB disks with the requirement that there is adequate space available for a reconstruction if a drive in the pool fails.
In this scenario, what should the administrator do to satisfy this requirement?
A. Create the disk pool, and then edit the pool to reserve 12 TB of space
B. Create the disk pool, and then add another 12 TB drive to the pool
C. Create the disk pool, and then the system automatically reserves 12 TB of space
D. Create the disk pool, and then create a hot spare on another 12 TB disk
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C – Create the disk pool, and then the system automatically reserves 12 TB of space
(tr-4652, october 2020)
Default preservation capacity by pool size (number of equivalent drives)
11 drives: 1
12–31 drives: 2
32–63 drives: 3
64–127 drives: 4
128–191 drives: 6
192–255 drives: 7
256–384 drives: 8
385–480 drives: 10
B
You can change pool settings, but changes are generally not required. Figure 8 shows various pool
settings in SANtricity System Manager. Note the default settings for reconstruction and other background
operations. Here the administrator can also change the preservation capacity equivalent number of
drives. In this case, the default is 3, but the user can select any number from 0 up to a maximum of 10
drives or 20% of the drives, whichever is less.
A is correct.
Default when create pool, preservation capacity is 2 drives, this is recommendation but we can set it to 1 drive
C