Western Digital My Cloud Mirror alternatives

roytom2

thanks for the advice - I'm taking appropriate action on this.

Meanwhile, after setting up the DS220j, about a day after the mains power supply failed twice within a hour. We don't have an UPS - we're in London where its all underground cabling - mains power faults are rare but not unheard of. The first time the box didn't auto restart - looking into the settings (Control Panel>Hardware & Power>Restart automatically when power issue is fixed, needs to be ticked - it wasn't - so I corrected this) - so when the power went out again it did auto restart.
But I got several emails (see below) from Synology about this including Write Cache should be set to Off - but I cannot see how this is achieved. 

"An unstable power supply may be the cause of abnormal state or shutdown of your system. Enabling the write cache of your drive may increase the probability of data corruption."

Thanks

[Deleted User]

roytom2 said:

thanks for the advice - I'm taking appropriate action on this.

Meanwhile, after setting up the DS220j, about a day after the mains power supply failed twice within a hour. We don't have an UPS - we're in London where its all underground cabling - mains power faults are rare but not unheard of. The first time the box didn't auto restart - looking into the settings (Control Panel>Hardware & Power>Restart automatically when power issue is fixed, needs to be ticked - it wasn't - so I corrected this) - so when the power went out again it did auto restart.
But I got several emails (see below) from Synology about this including Write Cache should be set to Off - but I cannot see how this is achieved. 

"An unstable power supply may be the cause of abnormal state or shutdown of your system. Enabling the write cache of your drive may increase the probability of data corruption."

Thanks

Storage Manager- HDD/SDD- Highlight Drive you want to modify- Action- Configure

https://i.imgur.com/Ol1jK73.jpg

https://kb.synology.com/en-global/DSM/help/DSM/StorageManager/disk?version=6#Cache

It probably has write cache disabled anyway by default (I would hope) but settings will be similar to the above.

As for switching back on after a power failure, personally I have my NAS set to remain off following a power failure as sometimes the power can return intermittently and result in several more unnecessary on/off cycles, sometimes very short.

That is the reason it is off by default.

As a result, I want to decide when to power back on, which I can do remotely if needed using WoL (wake on LAN).

Up to you though, if it comes back on reliably then no need to change that.

roytom2

Many thanks - as it happened they were both set (by default) for Write Cache enabled!
So I've now turned it off for both the drives.