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Forum Discussion
Duo v2 only writes to first TB on 2TB USB
Hello,
I have a Duo v2, firmware is 5.3.7 and I'm having issue with writing more than 1 TB to a 2 TB USB external. The external drive is seen as 2 TB by the Duo v2, and is formatted as NTFS. When connected to my PC the full 2 TB are accessible and can be written to. I have 2 user accounts on the Duo v2. I have created a series of backup tasks that are all set to run off the backup button on the front of the Duo. The Backup does work for 1 TB then stops with errors that indicate unknown issue. The log file also just shows unknown issue. I have determined, by experimenting, that once the external drive reaches 1.02 TB all creation of folder and files when connected to the front USB 2.0 or rear USB 3.0 ports is prevented, claiming a permissions issue. I have reset permissions on everything on the internal HDD/shares and on the external to have 'everybody' have full permissions. If I delete some files on the USB external drive, say 100 MB then I can create new folders and new text files and even copy about 100 MB of files to it, but once it reaches 1.02 TB used space, no more can be written or created. The USB drive has a Seagate ST2000DM001 2TB HDD in a VANTEC NST-330SU3-BK R USB 3.0 cradle. Again, the external drive is seen as ~1.8 TB in size by the Duo v2, and can be written to fine until 1.02 TB is used. Is there an account quota imposed on the external? What is the issue? How do I get the Duo v2 to use more than 1.02 TB of this external? I need to backup ALL of the 1.5 TB on the internal drive as it is full and I need to migrate to a 3 TB drive. The internal drive in the Duo v2 is a single Seagate 1.5 TB ST1500DL003 ... is the issue because the external drive is bigger than the internal drive? Please help. Thank you.
I have a Duo v2, firmware is 5.3.7 and I'm having issue with writing more than 1 TB to a 2 TB USB external. The external drive is seen as 2 TB by the Duo v2, and is formatted as NTFS. When connected to my PC the full 2 TB are accessible and can be written to. I have 2 user accounts on the Duo v2. I have created a series of backup tasks that are all set to run off the backup button on the front of the Duo. The Backup does work for 1 TB then stops with errors that indicate unknown issue. The log file also just shows unknown issue. I have determined, by experimenting, that once the external drive reaches 1.02 TB all creation of folder and files when connected to the front USB 2.0 or rear USB 3.0 ports is prevented, claiming a permissions issue. I have reset permissions on everything on the internal HDD/shares and on the external to have 'everybody' have full permissions. If I delete some files on the USB external drive, say 100 MB then I can create new folders and new text files and even copy about 100 MB of files to it, but once it reaches 1.02 TB used space, no more can be written or created. The USB drive has a Seagate ST2000DM001 2TB HDD in a VANTEC NST-330SU3-BK R USB 3.0 cradle. Again, the external drive is seen as ~1.8 TB in size by the Duo v2, and can be written to fine until 1.02 TB is used. Is there an account quota imposed on the external? What is the issue? How do I get the Duo v2 to use more than 1.02 TB of this external? I need to backup ALL of the 1.5 TB on the internal drive as it is full and I need to migrate to a 3 TB drive. The internal drive in the Duo v2 is a single Seagate 1.5 TB ST1500DL003 ... is the issue because the external drive is bigger than the internal drive? Please help. Thank you.
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- I have a 1.5 TB drive attached to my NV+ v1 USB port and have found the same problem. I get a "no apace left on device" error when it is ~50% empty. If I disconnect the external drive from the Readynas and plug it into my Mac the drive is happy to accept more data. Sure seems there is a quota being applied.
- I was thinking maybe it was a quota issue as I have 2 accounts on the ReadyNAS. I have a ticket open with the support team and will post more info when I hear something from them. Right now, I'm away from my NAS and they are requesting the log files. Just curious, do you also have 2 accounts on your ReadyNAS?
- No I only have one account on it.
- Here's an update and one solution, and I'm working on a second better solution.
The first ingredient to the problem: the external drive was formatted with MBR (master-boot-record) which can only be done on up to 2TB drives, above that GPT is needed. Second: the drive in the NAS has to be smaller than the partition you are trying to back up to. When I reduced the external drives partition by 30GB, thinking maybe there was just a slight difference in what 2TB meant to Windows and the NAS, the backup could proceed about 30-40GB further, then failed again. I then reduced the partition to 1.42TB with the NAS having 1.38TB (that's what 1.5 trillion byte drive formats to) and the backup completed fully. It even backed up the new files written after the first series failed. So once it works, it really rocks! This is the first and only issue I've had and overall I'm very impressed with the Duo v2. The issue is definitely within the firmware, and Tech support is aware of the issue up to the Engineering Dept. I'm sure they will have a fix out in the next (or so) firmware release(currently we're at 5.3.7) ... The second solution/test I'll try is to get rid of the MBR and use GPT partition for the whole 1.8TB (2 trillion bytes). I have a feeling it will work, otherwise a lot more people would be having this issue. - The second test worked flawlessly. By wiping the drive, initializing it as GPT and then partitioning it as a single 1.82TB (2TB) partition, the whole C volume backup (1.27TB) of the NAS completed in just 9.5 hours (2x faster) without the slightest issue. So This issue is PURELY a MBR one, and the best Solution is to have the drive setup as GPT.
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