Add disk to QNap Raid 5

Question

I have a QNap TS-569 Pro configured with Raid 5 of 4 hard drives of 1 Terabyte each. It has 5 disk slots and I want to increase the size of the Raid of another Terabyte.

Reading the manual seem pretty easy operation, but I have a doubt. After adding the new hard drive to the raid, the QNap will rebuild the raid. During this time (usually it's pretty long), can I access the data? Or would it be unavailable until the synchronization process finishes?

score 1 · Answer 1 · answered Jul 19 '21 at 13:29

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You can use the RAID array while it is being reshaped, but access will be slower than normal.

answered Jul 19 '21 at 13:29

Michael Hampton

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Ok thanks, and iScsi connections should also work right? – amicoderozer Jul 19 '21 at 14:10
With the same caveat, yes. – Michael Hampton Jul 19 '21 at 14:11

score 1 · Answer 2 · answered Jul 20 '21 at 13:10

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I answer myself. Tested on QNap TS-569 Pro configured with Raid 5. If you add a disk to the raid, the data will be unavailable until reshape has finished. Hence make sure to do this operation on weekends or overnight.

answered Jul 20 '21 at 13:10

amicoderozer

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That's quite unfortunate and unexpected. Any professional grade system should keep the array online during reshaping. – Michael Hampton Jul 20 '21 at 19:27
@MichaelHampton I know I was really disappointed when I found out! – amicoderozer Jul 22 '21 at 06:35

Add disk to QNap Raid 5

2 Answers2