TeraStation TS-1.0TGL/R5 - Firm. 1.04 - Missing disk space.

[willb]

   

I recently upgraded the disks in this NAS from the 250GB disks to 1TB WD black drives.

 

Everything went well but, despite the NAS reporting the disks as the correct size ( 976,762,584 kbytes) the Raid 5 array I built only shows "1674.4 GB" and under disk managment:

 

Status Normal
RAID Mode RAID5
Disk Structure Disk 1, Disk 2, Disk 3, Disk 4
Total Capacity 1,755,708,928 kbytes
Amount Used 11,748 kbytes
Percent Used 0.00 %
File Format XFS

 

Shouldnt I have closer to 3TB of spacein this array?

 

Is this a firmware limitation with this older NAS?

 

Forum searches and google searches havent been much help.

Message Edited by willb on 07-07-2009 03:33 PM

[Colin137]

That's normal. The Terastation Pro used the 2.4 Linux kernel, and can only handle RAID arrays of a maximum 2GB in size.

[willb]

   

Is there any way to combat this? Can you have two RAID 5 arrays on the same disks?

 

Even if not RAID, can I regain that exxtra space?

[Colin137]

You may be able to create two RAID1 arrays of 1 TB available each. If you delete the RAID array, it should go to JBOD mode with four independent 1 TB drives. If you set up RAID 0 on all four disks, it will most likely only have about 2 TB available for use.

 

This is all educated speculation... As the device wasn't designed to use drives larger than 500 GB, its behavior isn't all that predictable.