https://rickardnobel.se/raid-5-write-penalty/ Specialists in IT infrastructure services Fri, 20 Apr 2018 00:24:52 +0000 hourly 1 https://wordpress.org/?v=6.8.6 https://rickardnobel.se/raid-5-write-penalty/#comment-446941 Fri, 20 Apr 2018 00:24:52 +0000 https://rickardnobel.se/?p=718#comment-446941 You have explained here why the RAID5 write penalty when *changing* blocks. But what if I am only writing new data to the drive. For example writing a very large single file. Then for each block, the controller should first calculate the parity, then write the data and the parity. No need to read any existing blocks. Then the write penalty would be minimal. Am I missing something?

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