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Forum Discussion
Time Machine verification failure (again)
I know this has been discussed before but it seems like a perennial question.
The problem occurred with my ReadyNAS Duo every few months and this is the second time it has happened with my RN102 since I got it at the end of last year.
This message appears and gives the choice of creating a new backup now or later:
'Time Machine completed a verification of your backups on “ReadyNAS”. To improve reliability, Time Machine must create a new backup for you.'
Every time it has happened, I have looked on the Netgear forum (and previously the ReadyNAS forum) and then gone off at Google's mercy trying to find a cause or solution.
I can't say I have found any definite information but the finger almost always points at third party incompatibility.
To say that it is irritating to have to create a new backup every few months is a slight understatement. It either slows my Mac down to near unusable for several days if I do it wirelessly or renders it totally unusable for about 36 hours if I do it via ethernet as I have to leave my Mac next to my Netgear DGND3300 and RN102 which are, by necessity, kept in a utility room with no furniture.
Is anybody looking into this matter? Or is it just regarded as an issue which does not bother enough people and, if ignored for long enough, may or may not go away by accident.
I don't rely on the ReadyNAS Time Machine implementation; given my experience, I would be stupid to do so. I have a secondary USB Time Machine backup (yes, I know the old mantra that Time Machine isn't a backup) and I also have other strategies in place to cover the most essential data. But the convenience of wireless backup and occasional recovery of lost files is virtually negated by the regular failures. When I upgraded from my old ReadyNAS Duo to the RN102, I had hoped that the shiny new interface would not be a mere facade and that there would be an undelying robustness on which I could rely.
I know that Mac users are the poor cousins in demographic terms but could somebody please try to address this issue rather than dismiss it as an occupational hazzard; Time Machine integration is sold as a standard feature of ReadyNAS.
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There were a couple of posts on this back in 2011-2012 - but just a few, and none after that. So this might not be a ReadyNAS issue per se.
One poster on the older threads said that he had isolated his problem. It apparently only occurred when time machine was running during a raid scrub. His work-around was to find a free utility on the Mac, which let him "window" time machine, so it didn't run during times the NAS was busy.
Sorry, when I said perennial, I meant 'out there'. There are threads numerous sites about this problem and they tend to point at the hardware as the cause.
I did a search before posting and didn't see a mention of a utility though I already started using a Time Machine scheduler to try to avoid overwhelming the system at busy times a few years ago in an attempt to get around this problem and since then, Time Machine only backs up once a day.
Yesterday's backup was incredibly slow, 1.4GB took about four hours, then today's seemed to stall at 279MB of 900MB before finally giving the dreaded message.
It was claimed way back when on here that it was a known bug in Lion - three (almost four) full OS X iterations ago. Since I originally encountered the problem back on Lion, on a PowerPC system, it continued through to my current Intel Mac via two entirely new system installations on clean drives and about eight completely replaced Time Machine backups. I might be forgiven for asking why it keeps happening to me (and the other poor victims) whilst others escape.
I can, however, say with absolute certainty, that it never happened before I started using a ReadyNAS for Time Machine backups.
okulo wrote:
...I can, however, say with absolute certainty, that it never happened before I started using a ReadyNAS for Time Machine backups.
I wasn't doubting you. Just saying its been a few years since anyone has posted this issue here, and I don't think any of the other posts were for OS6 systems.
It might be on Netgear's list anyway if there are support requests. You probably should report a bug at support.netgear.com (w/o opening a case if you want to avoid a charge).
- Perhaps they should increase the memory in those devices as well. :D Expect significant changes to Time Machibe as APFS arrives.
We live in hope! :smileyhappy:
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