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Forum Discussion
Backup to USB: extrememly slow.
I have about 500Gb of data on a share on my ReadyNAS Duo, which I set up to be backed up to an external USB drive. The drive is formatted NTFS, and is USB2, so I was not expecting great performance (I did enable fast USB disk writes, though). The result was even more disappointing that I expected: it took two weeks!!! (approx. 0.5Mb/s)
I then performed the following test: I made a new share, and wrote a single file to it and backed that up to the USB drive. I re-did this with files of different sizes, measuring the time the backup took. Here are the results:
So it looks like there is a performance problem with large files, at least on my setup. Anyone else experienced the same? Any advice?
- Y.
I then performed the following test: I made a new share, and wrote a single file to it and backed that up to the USB drive. I re-did this with files of different sizes, measuring the time the backup took. Here are the results:
- File Size --- Time --- Rate
40Mb --- 27sec --- 1.5Mb/s
400Mb --- 15min --- 0.44Mb/s
2.5Gb --- 29.5hrs --- 23.5kb/s
So it looks like there is a performance problem with large files, at least on my setup. Anyone else experienced the same? Any advice?
- Y.
3 Replies
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- NTFS performance for USB drives with the Duo v1 (runs RAIDiator 4.1.x) is terrible. Connecting your NTFS drive to a PC and transferring via that would be much faster.
Alternatively you could format the drive to use EXT3 filesystem under Volumes > USB Storage in Frontview.
Welcome to the forum! - Thanks for the welcome!
So I'm out of luck with the external USB drive backups.
The data in question is actually a backup of some other stuff off some servers on the network. A task on one of the servers writes all the data to the NAS on a daily basis. The reason I wanted the NAS to then copy that to the external drive, was to implement off-site backups. I suppose that changing the original task on the server to write to the NAS's external USB share would slow that task down to 2 weeks at a time.
The reason I wanted the USB drive to hang off the NAS is because the off-siting should be as automatic as possible, and performed on a rota by various members of staff - I don't want people to have to mess around with PCs and manually copying files, particularly as some of them are not very technical (having to press [backup] for 10 seconds before pulling the drive off is as far as I would stretch them!).
- Y. - Oh, and BTW, the NAS runs RAIDiator 4.2.17
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