Write speeds with OSX Encryption on?

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  • Last Post 08 February 2019
Greg Benz posted this 07 February 2019

I can't find a way to pause or disable sync of a new array, so I cannot do any speed testing to help configure and optimize my new drive before I put data on it.

I'm seeing 180MB/s for RAID6 as my default write speed, and it drops to about 100MB/s if I enable OSX encryption (1MB stripe, 512 sector, write through).  I see around 400MB/s write for my gen1 Pegasus with encryption on (same RAID 6). I am hoping for 600+ with the Pegasus3 R6 with encryption on, but that seems a vast ways off with my current 100MB/s.

A bit concerned, as LaCie 6Big has a flaw that causes massive drop in write speed with encryption on, and I'm wondering if the Pegasus 3rd gen is also falling victim to a similar issue (the gen 1 runs circles around both, but may simply be the sync process).

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Ranjith kumar posted this 08 February 2019

Hi Greg,

I can see that you have already created a web support case id-20190206184100S where we have

requested you to attach the subsystem report. Kindly attach the report and reply to the case id.

Regards,

Ranjith

 

 

Greg Benz posted this 08 February 2019

Hi Ranjith-

I am not claiming any failure or performance issue. There is no reason to think that the performance of my drive is any different from the typical Pegasus3 R6.

I am asking how to pause or stop the automatic synchronization process so that I may test different configurations in order to find the most optinal settings for my needs. Every time I make a change, I presume the sync will restart. So it could take weeks for me to test if I cannot pause or stop the sync. I understand the purpose of that to protecting my data, but I am just testing the drive before I put any actual data on it. The primary purpose of my forum post here was to get info from other users, as I suspect you may not allow the user to pause or stop the sync.

Thank you,

Greg

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