What is the largest hard drive or the RAID supported by El Capitan and Yosemite?

What is the largest hard drive or the RAID supported by El Capitan and Yosemite?  Also, WHERE can I find this specification?  Drobo claims that 16 TB is the largest external RAID supported and I do not.

FYI............ 2 UPDATES since I posted this question:

"1. Drobo has updated their FIRMWARE to allow now to 'beyond' 64 power to RAID".  Thus, their original 16 TB limit has now been replaced by their new limit of 64 to.  Also note that when you use a Drobo, Apple Mac OS does correctly shows space 'Drive' and the 'free space', if the Drobo 16TB exceeds the size; but the Application DashBoard of Drobo displays the correct numbers.  For example, my Drobo 5 d contains 5, 8 TB disks, for a total size beyond 40 to RAID (theoretically, since most of us should know, now, that the ACTUAL SIZE IS SLIGHTLY SMALLER than THE THEORETICAL SIZE).  AVAILABLE FOR USE ACTUAL SIZE IS ONLY 28.9 TB.  Thus, 40-28, 9 = 11.1 TB gets used in place for the PROTECTION of RAID beyond and the difference between REAL SPACE and SPACE THEORY.  It IS NORMAL because any RAID 5 device always uses about 1 size of hard drive for its Protection.  So, knowing this, the DeskTop icon showing 28.9 TB disk space and free space as everything that is not yet used.  However, instead, the Mac OS shows 70,37 TB disk space and free space like 68,37 TB, which are both incorrect.  Although I'd love it if Mac OS has been magically increase my disk space, in fact, these two numbers are false.  Drobo knows this, and Apple has not, in my discussions with both.  So I hope, between the two companies, that this problem can be corrected.

2. after many hours on the phone with Apple Support, through no less than 6 people including 2 senior advisers, NONE OF THEM COULD ANSWER MY QUESTION ON CE WHO IS MAXIMUM ALLOWED HARD DRIVE or RAID SPACE AUTHORIZED BY Yosemite and El Capitan.  For me, THIS IMPORTANT FACT SHOULD SIMPLY BE LISTED IN THE OS SPECIFICATION TECHNIQUE, it's quick and easy to read on the Support Site.  But Apple is the new bureaucracy, they are, I don't see what is happening any time soon.  So, be aware that, for now, HE IS No. LIMIT ON SIZE, as an Apple adviser said; but could not confirm in writing; and, IT IS AN INCORRECT DISPLAY SIZE AND FREE SPACE, if your drive is greater than an unknown 16 + TB in size.  Note that I have 3 other RAIDs that are properly in place showing that 9 TB, TB 12 and 18 to size; but I do not know how the SIZE IS IMPORTANT to ensure that the operating system display it correctly, except for my Drobo TB 40.  So, the bottom line, somewhere between to 18 and 40 to is where he goes wrong, in its display of sizes.

Tags: Mac OS & System Software

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