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What are the limitations on EXT4 / EXT3 / ZFS / XFS ?

Posted by Yvon Lei on 21 July 2016 11:37

Thecus OS5 X32 N7700 / N8800 series support EXT3, ZFS & XFS file systems. It is up to exist 3 set of RAID volume in one unit at the same time.

There are some limitation of these three file system,

EXT3 supports up to 8TB for each data volume.
ZFS is use for snapshot function only. In Thecus NAS, it is limit to exist up to 1 RAID volume that using ZFS format at the same time. For more ZFS limitation, please refer to http://thecus.kayako.com/default_import/Knowledgebase/Article/View/116/0/zfs-limitations
XFS supports larger than 8TB and all functions, but it doesn't support quota function.

Models: 1U4500, 1U4600, N0503, N4100PRO(*2), N4200, N5200, N5200PRO, N5500, N7700 series, N8800 series
The following limitations are in firmware v1.xx.xx ~ v3.xx.xx

	> 8TB	Folder QUOTA	FTP	AFP	ACL	NFS	SNAPSHOT
EXT3		V	V	V	V	V
XFS	V		V	V	V	V
ZFS	V	V			*(1)		V

Models: 1U4600, N4100PRO(*2), N4200 series, N5500, N7700, N7700SAS, N7700PRO, N7700PLUS, N8800, N8800SAS, N8800PRO, N8800PLUS, XXX series

The following limitations are in firmware v5.xx.xx

	>16TB	>8TB	User Quota	Folder Quota	FTP	AFP	ACL	NFS	SNAPSHOT
EXT3			V		V	V	V	V
EXT4		V	V		V	V	V	V
XFS		V	V		V	V	V	V
ZFS		V		V			*(1)		V

*(1) Top level only, no recursive.
*(2) N4100PRO does not support ZFS.

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