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George

To SHR or not

Question

Hi all

 

Just starting out on Xpenology, originally was planning on buying a Synology... and that was primarily because of the SHR/Btfs combination.

 

After installing (for now playing around in a VirtualBox VM to get familiar with the features, until I get my HW and build the actual unit, still deciding if it will be Bare metal build or a Virtualbox build).

 

I created the Volume1 over the 4 drives I configured, immediately realised that this is being done on the previous steps RAID device created, at which time I struck me that this was not SHR.

 

My host will initially have 4 x 4TB Seagate Ironwolf drives, with the plan of expanding with another 4 drives later, that might be 4TB drives, it might be larger.

If they are also 4TB, no problem. if they larger... waste of space.

 

Whats the general experience/feeling with SHR, discovered it's disabled by default on XPEnology.

 

G

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SHR is good if you have mismatched drive sizes.  I have SHR enabled on mine because I have 2x3TB and 2x2TB drives, but when I eventually replace the 2TBs with the 3s that I have, I'll go to a RAID-5

 

If they're all the same, SHR is the same is RAID-5 (SHR-2 = RAID-6)

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I like to have the option, the initial build will be booting off USB, 4 x 4TB drives as primary media storage, I have some 2TB drives lying around that I can also slot in there, they will eventually be removed and replaced with whatever the budget can afford, prob more 4TB or maybe 8TB drives, and this is where I like the SHR idea, I can add them to the same volume.

If this was ZFS I would have added all these bigger drives into a 2nd separate volume of course.

 

How do I get access to SHR-2, I did the /etc.defaults changes to get SHR available, but did not see SHR-2 anywhere as a option.

 

G

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i guess the option will be offered if you add a drive, then you can choose to have a larger volume or add redundancy (or as spare drive)

 

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Makes sense, as I only have 4 drives, it's only offering SHR-1

 

If I have 5-6 drives, then it might offer SHR-2.

 

Will lab it.

 

G

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