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From Rick Hillegas <rick.hille...@gmail.com>
Subject Re: Write Cache - Data Corruption
Date Sun, 16 Jul 2017 14:28:23 GMT
On 7/15/17 10:12 PM, Shreyans Jain wrote:
> If we have write cache off, do we need a ups or some other power backup ?
I'm not an expert on ups's, but my understanding is that they provide 
other kinds of protective power conditioning which you would want in a 
production environment. See, for instance, 
https://en.wikipedia.org/wiki/Uninterruptible_power_supply.

Hope this helps,
-Rick
>
> On Sat, Jul 15, 2017 at 8:02 PM, Rick Hillegas 
> <rick.hillegas@gmail.com <mailto:rick.hillegas@gmail.com>> wrote:
>
>     On 7/14/17 6:21 PM, Shreyans Jain wrote:
>
>         If we have a ups and we properly shutdown the OS, will then we
>         have to disable write cache for the hard-disk in order to
>         prevent data corruption. Are there any chances left for the
>         data to be corrupted by power failure with write cache on?
>
>         Regards,
>         Shreyans Jain
>
>
>     That will reduce your risk. But operating systems can crash before
>     flushing the cache to disk.
>
>


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