[Resolved] Interminably Slow Recover from NAS
When I tried to restore a 600 GB drive from the ReadyNAS onto a new drive it gave an estimated time of 23 days (and it took over an hour just to give the estimate). Yikes! I've tried smaller backups, including a small partition that is only about 7 GB. Over the network from the ReadyNAS the estimated time is over 7 hours, but it went fairly quickly when I recovered from a local disk.
I'm using ATI 2012 on a system with multiple drives backing up to a ReadyNAS system on my network. I'm running incremental backups on a daily basis, and these are taking almost not time at all. Even the initial backups seemed to run in a reasonably amount of time, including the drive that has over 600 GB of data (it's just for data -- it's not the boot drive).
I'm at a loss to figure out why restores are taking so long. Clearly, a 23-day restore is not acceptable, and because other people use ATI 2012 with a NAS, I must be doing something different to cause such long restores.
Is the problem that the incremental backup spans a couple of months and has over 60 separate files to piece back together? What else could be going on?
Thanks in advance!
Solution posted here.
I had similar problems with my WD MyBook World Edition NAS. When I replaced it with a Linux box I quickly learned the WD NAS was the problem, not ATI. It was amazing the difference. I know this isn't necessarily your problem, but wanted to share just in case.
Thanks for the feedback. The estimated time turned out to be off by a factor 4 -- the recover took over 6 days. It didn't even complete the restore.
To see if the problem was that I had too many increments, I started another backup of the disk onto the NAS. That took about 6 to 8 hours (I wasn't watching it too carefully), but the restore (no increments, just one backup version) started to take days again.
I don't see how this is a problem with the NAS itself.
I'm at a loss here -- I don't see how I can use this to backup this large drive if restores take a week.
Hello everyone,
Thank you for your posts and your kind assistance Pat and Gork.
dbk, since this a recovery issue I would recommend contacting our Support team. We do not charge for support if it is a recovery issue.
Please collect the following diagnostic information:
1. Acronis System report.
2. Wireshark log.
Please let me know if there is anything else I can do for you.
Thank you.
The problem is resolved ... and I feel like an idiot.
Despite what I thought was snappy performance from my NAS, I discovered (prompted by Acronis Tech Support) that I was getting only ~200 kB/s transfer from NAS to PC.
My PC was going through two switches to the router, so I reconfigured to have it go directly to the router.
That improved transfer speeds to ~10 MB/s.
I then enabled Jumbo Frames on both NAS and PC, and that bumped things up to 20 MB/s to 25 MB/s. With more tweaking, I can likely get above 30 MB/s where the transfer rates really should be.
At 20 MB/s to 25 MB/s, I performed a restore (on the main file, not the increments) of the file which was closer to 700 GB. The complete restore took about 12 hours, which is much, much more manageable. At 20 MB/s, the theoretical time would be closer to 10 hours, so this is pretty good.
Looking through the ReadyNAS forums, I should be able to get to 30 MB/s which I'm going to need since I'm moving this drive to 2 TB!
Acronis support was responsive and helpful -- thanks!
Good to hear - thanks for posting back. I wish there was something I could do about my slow WD MyBook World Edition NAS, but alas - I don't think so. I'd like to replace that as well as my Linux file server and WinXP "server" (runs several server programs as well as Linux on a VMware Workstation which runs my web server) with a nice big fast single computer that would take care of everything for me in one box, all via VMs, but I'm too poor! (I'm curious how well a VM would work as a Linux file server.)
Anyway, glad you figured stuff out. And it's refreshing to hear a good story about Acronis support. Good job Acronis!
Hello dbk and Gork,
Thank you for taking the time to provide us with an update dbk!
Gork, we appreciate your feedback.
Thank you.