A systems administrator wants to increase the existing drive space on a Linux server with a software RAID. After physically adding the new drive to the system, and then adding the drive to the RAID…

Question

Options

• ARun to alert the kernel to a new drive.
• BConvert the new drive to a hot spare.
• CSet the RAID type to a RAID 1.
• DGrow the array size to four members.

• A
  5% (1)
• C
  16% (3)
• D
  79% (15)

Explanation

The array status shows 'sdd1[3]S' - the trailing 'S' indicates the new drive was added as a hot spare, not as an active array member. The '[3/3] [UUU]' confirms only 3 active drives in a RAID 5 array, meaning the 4th drive is standing by as a spare. To actually increase usable storage, the administrator must grow the array to include all four members as active devices using 'mdadm --grow /dev/md0 --raid-devices=4'. Simply adding the drive physically or as a spare does not expand the array's data capacity.

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