Author Topic: TS4400D How large Raid5 array can it handle?  (Read 78 times)


  • Calf
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TS4400D How large Raid5 array can it handle?
« on: February 22, 2021, 09:02:45 am »
I have a question that I have not been able to figure out anywhere online.

I have 2 buffalo NAS Ts4400D and for the first time ever Iím running RAID5 on them instead of just a bunch of disks. With 4x3tb drives

I know the unit itself can handle at least 12tb hard-drives since i have had one in them as a test.

But I also read somewhere that there is a max size of how large an array a NAS can handle. I am running latest firmware on it 4.12-00.3 on both boxes.
Buffalo support says it supports up to 6tb Drives on these units. So is this the max? 18tb (with 1 drive for parity) ? ) or will it be able to run larger arrays? I believe it has 2gig of RAM if that is of any help :)

Thank you all in advance


  • Debian Wizard
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Re: TS4400D How large Raid5 array can it handle?
« Reply #1 on: February 22, 2021, 01:55:56 pm »
I believe that device is an Intel device. I'm not aware of any known size limits for those devices.

One way to find more information would be to find out which processor that model has and check out the specifications. I know the TS5000 series 4-bay devices use the on-board sata controller of the chipset (the larger devices have an additional PCI sata chip).

I've got links to the relevant datasheets on my wiki page for the TS5000 devices:

I think the TS4000 probably use a different CPU/chipset but you can probably find the equivalent information.

If you're interested you also have the option of installing Debian Linux rather than the stock firmware:


  • Calf
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Re: TS4400D How large Raid5 array can it handle?
« Reply #2 on: February 23, 2021, 07:20:11 am »
Thank you so much for your answer.

I believe itís an Atom D2550. Not sure what to look for exactly when it comes to size of raid arrays. Itís software raid though if I understood it correctly 😊