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Re: ReadyNAS OS 6.10.0 (Hotfix 2) - problems after update from 6.9.5
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Hi.
A big problem after upgrading from version 6.9.5 to 6.10.0.0 / patch 2).
Until the previous firmware version in case of power loss due to power failure, the NAS restarted without any problems by going online after a few minutes.
Now, with 6.10.0.0, instead, in the case described above, after booting, the system performs a new resynchronization of the data! So about four days of work for a simple jump of the electric current!
Why all this ??
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The NAS will resync if it detects that one of the disks is a bit behind the others (due to missed writes). But when the disks are out of sync, it is also possible to lose data (depending on what writes were missed).
I always recommend a UPS. Lots of data loss stories here start with an unexpected power cut.
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Re: ReadyNAS OS 6.10.0 (Hotfix 2) - problems after update from 6.9.5
It has nothing to do with the OS revision (at least, not since a change made several versions back), it has to do with what your NAS is doing when the outage hits. It sounds to me like you really need an UPS.
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Re: ReadyNAS OS 6.10.0 (Hotfix 2) - problems after update from 6.9.5
Maybe you didn't understand well what I wrote. I have had this NAS for five years and in all this time it had never happened that after a power surge on reboot a resynchronization started. It only happened after updating to firmware 6.10.0: is it just a coincidence? I don't think so.
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Re: ReadyNAS OS 6.10.0 (Hotfix 2) - problems after update from 6.9.5
It is common for the NAS to do a resync after an unexpected power cut.
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Re: ReadyNAS OS 6.10.0 (Hotfix 2) - problems after update from 6.9.5
I understood. At one point (I forget which update, but it's been a while), Netgear did change from having caching enabled only when an UPS was detected to having it on all the time. Before that time, it was less likely that a sudden power loss would result in a re-sync, and that may account for some of your history with it. But since that change, it's common. You apparently got lucky a lot or just had fewer interruptions, and thus fewer chances.
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The NAS will resync if it detects that one of the disks is a bit behind the others (due to missed writes). But when the disks are out of sync, it is also possible to lose data (depending on what writes were missed).
I always recommend a UPS. Lots of data loss stories here start with an unexpected power cut.