Can create iscsi lun greater than 16TB

RAID, Volume, storage pool, hard drive, USB, SSD cache and iSCSI LUN
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peter.rogers
Posts: 2
Joined: 22 Oct 2021, 13:05

Can create iscsi lun greater than 16TB

Post by peter.rogers »

HI All,

I currently have a F5-422 unit with 4 x 14TB drives setup as Raid 5 giving me approx 38TB of usable space.

I am trying to create a new iscsi volume so i can mount the space on my windows backup server.

Everytime i try and create a drive greater than 16TB i get an error

Warning: Division by zero in /usr/www/include/class/iscsiadm.class.php on line 762

and it seems to create a 0 byte lun which cant be connected to via windows,

if i create a LUN of 16000gb it seems to work fine,

How do a create a single Lun to connect to my server?

just updated to firmware 4.2.15-2107221409 which seems to be the latest version available via auto update.

any help would be great,

Peter
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TMSupport
TerraMaster Team
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Joined: 13 Dec 2019, 15:15

Re: Can create iscsi lun greater than 16TB

Post by TMSupport »

Hi! Is the file system of the volume Ext4? Under Ext4, only 16TB LUNs can be created. It is recommended to set the file system to Btrfs.
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peter.rogers
Posts: 2
Joined: 22 Oct 2021, 13:05

Re: Can create iscsi lun greater than 16TB

Post by peter.rogers »

Hi Support,

Thanks for that, yes it was formatted ext4. I have recreated the Volume and was able to create a new LUN at the full 40TB size,

Now to check if its stable.

Thanks

Peter
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