Author Topic: Allow setting FlexRAID reserve by percentage.  (Read 2610 times)

Offline m0t0k0

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Allow setting FlexRAID reserve by percentage.
« on: December 06, 2011, 07:42:32 am »

I get an error message from WHS 2011 Dashboard telling me one or more hard drives are full.

I can fix this by making sure my HDD has at least 2.5% free space.
My HDD is 3TB so I can set a reserve size of 75GB

But that will mean a huge amount of my 250GB HDD will be left unused (30%)

If FR allowed me to say leave 3% of my drive reserved it would mean there would be much less waste when extreme differences in drive sizes existed.

I will put this on mantis when I get the chance
WHS 2011
Transparent RAID

Offline NLS

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Re: Allow setting FlexRAID reserve by percentage.
« Reply #1 on: December 06, 2011, 07:56:20 am »
I agree (totally).
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NLS
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Offline Brahim

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Re: Allow setting FlexRAID reserve by percentage.
« Reply #2 on: December 06, 2011, 08:00:44 am »
Err... maybe the solution is to have Windows keep quiet.
The reserve is meaningful when set according to the largest file you will ever write to the pool.
Using percentages might fail that requirement for smaller drives.

http://www.addictivetips.com/windows-tips/disable-low-disk-space-notification-alert-in-windows-7-vista/

Offline m0t0k0

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Re: Allow setting FlexRAID reserve by percentage.
« Reply #3 on: December 06, 2011, 08:38:08 am »

Ah I see

Thanks for finding that article I have been googling low disk space and disk full ect and only found useless nonsense

When FR writes to the pool does it not pick a destination drive, check space left, reserve size and see if the file will fit?
What happens if I try and write a file larger than my reserve to the pool?
I guess its only a problem if the destination drive is nearly full and the write would cause it to over run?
WHS 2011
Transparent RAID

Offline Brahim

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Re: Allow setting FlexRAID reserve by percentage.
« Reply #4 on: December 06, 2011, 09:38:56 am »
FlexRAID does monitor the free space of each drive, but does so lazily as to not affect performance.
In any case, consider this fixed for the next build.

Offline m0t0k0

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Re: Allow setting FlexRAID reserve by percentage.
« Reply #5 on: December 06, 2011, 10:27:50 am »
FlexRAID does monitor the free space of each drive, but does so lazily as to not affect performance.
In any case, consider this fixed for the next build.


Nice one thanks Brahim
WHS 2011
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