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What is "Enable Bitmap" on my Qnap NAS? Will it allow me to recover data in case of failures?

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2 Answers 2

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"Bitmap" is used to allow faster RAID rebuild times, but you will be able to recover without it if you have a proper RAID level enabled.

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I have RAID 5... So the only thing about it is speed, non increased safety, right? –  Pitto Oct 13 '11 at 15:21
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Yes, this is correct. The bitmap is said to reduce the speed a litle during normal operation while speeding up recovery. –  Sven Oct 13 '11 at 15:22
    
Do I have a chance to disable it later? –  Pitto Oct 21 '11 at 14:38
    

If I remember correctly, it allows you to recover data faster. (Only in certain RAID scenarios though.) Here's a link -ignore the bickering- that should help.

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Nice link, though in fairness I feel that the bickering is fairly applicable in this case, too. –  MadHatter Oct 13 '11 at 15:34
    
agreed, but not very suitable to helping everyone else get to the answer! –  Ben Campbell Oct 13 '11 at 15:38

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