Hi
I need to backup some larger VMs which have a VHDx file that is 24TB in size. When I copy this to my SMB share the copy fails - the reason is that the QNAP file system has a limit of 16TB per single file.
Tested on:
863U
453D
Is there any way around this, i.e. creating a volume with a larger block size for the file system than 4kb? - the Qnap "ionodes option" is something different and does not alleviate this issue.
thx
How to avoid 16TB file size limit ?
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Re: How to avoid 16TB file size limit ?
Not heard of this, however a 16TB FILE??? looks like your have to split this file as getting that over a LAN will be a mission.
Many Thanks
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Re: How to avoid 16TB file size limit ?
Such a file is nothing when you do virtulization in some business areas. The actual file in question is 24TB at the moment. Splitting this up is not possible, I could start a new file no but that would make thing more complicated on the managing side.
Transferring this over a LAN is a simple mission. 7 to 8hrs via 10GB, thats a piece of cake.
All that would need to be done is creating a new volume and format it with ext4 and a 16kb block size - ** can that be done?
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Re: How to avoid 16TB file size limit ?
AFAIK the default block size of 4K only supports file sizes up to 16TB
ext4 can support other settings; I think you can't change those settings from the QTS GUI
man mkfs.ext4
-C cluster-size Specify the size of cluster in bytes for filesystems using the bigalloc feature. Valid cluster-size values are from 2048 to 256M bytes per cluster. This can only be specified if the bigalloc feature is enabled. (See the ext4 (5) man page for more details about bigalloc.) The default cluster size if bigalloc is enabled is 16 times the block size.
ext4 can support other settings; I think you can't change those settings from the QTS GUI
man mkfs.ext4
-C cluster-size Specify the size of cluster in bytes for filesystems using the bigalloc feature. Valid cluster-size values are from 2048 to 256M bytes per cluster. This can only be specified if the bigalloc feature is enabled. (See the ext4 (5) man page for more details about bigalloc.) The default cluster size if bigalloc is enabled is 16 times the block size.