Lenovo ThinkAgile CP 4000 Series, Upgrade Manual

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Increasing the size of the VDO
This section covers the steps required to increase the size of the VDO data after adding the new storage
drives to the RAID array.
Ensure that the set of eight (8) drives are properly included in the RAID array according to the Adding the new
drives to the RAID array section.
Procedure performed by : Customer or field service
To increase the size of the VDO, follow these steps:
Step 1. Calculate the new size of the VDO according to the following formula:
new VDO size
= (
size of the RAID50 device
)
—
(
size of the internal VDO-specific metadata
)
Note: All the sizes are calculated in number of 512–byte sectors.
As calculated in our example in the Adding the new drives to the RAID array section:
• The size of the RAID50 device is
18,628,988,928
• The size of the internal ThinkAgile CP VDO-specific metadata is
2,048
Therefore, the new VDO size is
18,628,988,928
—
2,048 =
18,628,986,880 512–byte sectors.
Step 2. Increase the size of the VDO data and reload the VDO:
d dm msseettu up p rreello oaad d vvd do o__d daattaa ----ttaab bllee ''0 0 1 18 86 62 28 89 98 86 68 88 80 0 lliin neeaarr //d deevv//m md d//m md d5 50 0 2 20 04 48 8''
Step 3. Resume the VDO:
d dm msseettu up p rreessu um mee vvd do o__d daattaa
Step 4. Check the new size of the VDO data:
d dm msseettu up p ttaab bllee vvd do o__d daattaa
0 18628986880 linear 9:50 2048
llssb bllkk || g grreep p vvd do o || h heeaad d --1 1
vdo_data 253:9 0 8.7T 0 dm
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Lenovo ThinkAgile CP Storage Capacity Upgrade Guide