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SoftRAID Volumes
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Topic starter
Hello,
I use a LaCie 5big Thunderbolt 2. I had 5 4tb drives in it. One drive failed and I decided to replace it with a 10TB. Now I should have 26TB. But I can only use 20TB in the Hardware Raid config. So I thought maybe it is a limitation of the hardware RAID controller. So I used JBOD and created a SoftRAID RAID. But I can only choose 20TB here as well.
Can you help me out?
Is it a problem with SoftRAID, with the LaCie 5big Thunderbolt 2 or maybe with the drive?
Posted : 16/06/2020 9:54 am
You will get higher capacity when you replace all the disks.
With SoftRAID, however, you can create an additional non RAID volume with the 6TB available.
RAID requires all partitions to be identical in size.
Some enclosures have something similar to RAID that uses different drives to make a larger volume, but it is not really RAID, and is more prone to problems.
Posted : 16/06/2020 10:58 am
Topic starter
You will get higher capacity when you replace all the disks.
Currently I don't need the extra 6TB. I think I will wait until the others drives die and I replace them all with the same size.
RAID requires all partitions to be identical in size.
Strange. I thought this only applies to RAID 5 and others. I use RAID 0. I thought they just add all the drives together.
I used this calculator:
https://www.synology.com/de-de/support/RAID_calculator?hdds=10%20TB|4%20TB|4%20TB|4%20TB|4%20TB
Maybe this just applies for Synology NAS and not for all RAID 0 in general?
Thank you for your reply.
I have another question:
Do you recommend using the LaCie 5big with the hardware RAID or use it via SoftRaid? I will lose some speed due to software, but on the other hand I have more infos about S.M.A.R.T of the single drives.
Posted : 16/06/2020 4:55 pm
What Synology is doing is built into the hardware. I would guess, without looking into it, that the stripe unit size of each disk is proportional to the relative size of the disk. With a 2 and a 4TB drive, the 4TB drives must have double the stripe unit size.
Posted : 17/06/2020 12:45 am
