Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Can arrays span multiple controllers (all 2720's), and are 5TB+ drives supported?
Document: Both WD and Highpoint confirmed the need to use Enterprise drives for a RAID controller (basic motherboard RAID controllers might not be a problem - stressing the "MIGHT" part of the statement). 3Ware/Adaptec had given me similar advice in the past, so no surprises. If you go with cheap disks, expect random drops, broken arrays, etc.Oh, another interesting note - this card appears to use the common "end" key shortcut to skip its BIOS display.
I have had this card running for 2 years now, and i have 7 WD black 1.5TB (64MB cache) drives in a RAID 10 with 1 hot-spare.everything works and i can 400MB/s write and 600MB/s writes !!!
Does not work. I had 6 2TB and 2 1.5TB drive connected to the card. At boot up, it does not see 2 of the 2TB HDs on port 0 and 1. As a test, I configured the 4x2TB drives into RAID 5 and 2x1.5TB drives int RAID0. While trying to transfer some files to the RAID5 logical drive, the RAID0 logical drive got disconnected and the 2x1.5TB drives dropped off the controller. Sending this piece of junk back and sticking with my old LSI.
RAID-5/6 arrays slow down, RAID-0 and RAID-1 arrays break, etc. Save yourself the aggravation and get the real thing. The price difference between the F3 and F3R drives was $10 when I bought them, although some vendors go for a high premium for their RAID drives. Be sure to shop around.The web interface is adequate. Not really nice and streamlined, but it gets the job done.
I then proceed to build a DOS bootable floppy and add raidtool.exe to that image. I reboot into DOS with high hopes that we can get this resolved. Once I launch the raidtool two windows show up and no arrays or drives are listed. No functions can be performed.At this point I realize just how 'toast' I am. Abhorring engaging support by nature, I finally, begrudgingly log into the web site and create a support ticket since there is no phone support.
I purchased this card after realizing none of the on-board SATA controllers support > 2TB drives on my HP xw8600. I experienced some problems after installing the card and connecting the four 3TB WD Red drives I bought. After the cards bios screen posted and detected the drives the screen would go black with a cursor blinking in the upper left corner of the screen and would not boot the OS. Disconnecting the HD's from the card resolved the booting issue but - this meant the card is useless.
This device would make the system unable to boot. Flashed bios, tried multiple driver versions, multiple raid configs, even tried just having one drive connected, and as long as anything was connected to it, windows would not boot. I've read a lot of spotty reviews for highpoint cards so I should have known better.
Perfect for general Windows-based servers - capacity and security are usually more important than performance, but the 6G SAS support doesn't hurt.I'm not new to RAID (or highpoint) controllers, so I was sure to pick this up sooner or later.
The SGL2720 should not prevent other disc controllers from booting an operating system. Use the Highpoint RAID management software to configure devices on the SGL2720 to meet your requirements.The default RAID configuration utility username is RAID and the password is hpt. Both are case sensitive.
Some of on-board SAT-III (Sata 600) controllers are unable to provide true throughout due to the fact that they are hooked to PCIe-x1 bus. A good example are Marvel controllers on X58 boards. This causes high-speed SSD  performance to suffer significantly.I purchased this card specifically for this reason.
Answer: No. They don't see each other's drives. what you can do is to create an array on each of them and then in the OS use them as a single drive.